/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_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:05:31,283 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:05:31,286 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:05:31,342 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:05:31,343 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:05:31,348 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:05:31,351 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:05:31,360 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:05:31,364 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:05:31,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:05:31,382 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:05:31,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:05:31,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:05:31,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:05:31,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:05:31,391 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:05:31,392 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:05:31,393 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:05:31,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:05:31,397 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:05:31,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:05:31,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:05:31,402 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:05:31,403 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:05:31,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:05:31,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:05:31,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:05:31,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:05:31,419 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:05:31,446 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:05:31,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:05:31,448 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:05:31,448 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:05:31,449 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:05:31,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:05:31,449 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:05:31,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:05:31,449 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:05:31,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:05:31,450 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:05:31,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:05:31,450 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:05:31,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:05:31,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:05:31,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:05:31,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:05:31,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:05:31,452 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:05:31,452 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:05:31,452 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:05:31,452 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:05:31,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:05:31,453 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:05:31,453 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:05:31,453 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:05:31,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:05:31,900 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:05:31,904 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:05:31,905 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:05:31,906 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:05:31,907 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 09:05:31,988 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbe4aa0d9/018a4d2071d24443b7eb3fa8c27785ee/FLAGe8f05f298 [2020-12-22 09:05:32,687 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:05:32,687 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 09:05:32,719 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbe4aa0d9/018a4d2071d24443b7eb3fa8c27785ee/FLAGe8f05f298 [2020-12-22 09:05:32,954 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbe4aa0d9/018a4d2071d24443b7eb3fa8c27785ee [2020-12-22 09:05:32,959 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:05:32,962 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:05:32,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:05:32,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:05:32,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:05:32,974 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:05:32" (1/1) ... [2020-12-22 09:05:32,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fcb0f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:32, skipping insertion in model container [2020-12-22 09:05:32,977 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:05:32" (1/1) ... [2020-12-22 09:05:32,985 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:05:33,071 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:05:33,444 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_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[15460,15473] [2020-12-22 09:05:33,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:05:33,552 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:05:33,845 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_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[15460,15473] [2020-12-22 09:05:34,008 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:05:34,030 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:05:34,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:34 WrapperNode [2020-12-22 09:05:34,031 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:05:34,032 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:05:34,032 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:05:34,032 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:05:34,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:34" (1/1) ... [2020-12-22 09:05:34,062 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:34" (1/1) ... [2020-12-22 09:05:34,126 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:05:34,127 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:05:34,127 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:05:34,128 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:05:34,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:34" (1/1) ... [2020-12-22 09:05:34,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:34" (1/1) ... [2020-12-22 09:05:34,156 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:34" (1/1) ... [2020-12-22 09:05:34,156 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:34" (1/1) ... [2020-12-22 09:05:34,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:34" (1/1) ... [2020-12-22 09:05:34,214 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:34" (1/1) ... [2020-12-22 09:05:34,225 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:34" (1/1) ... [2020-12-22 09:05:34,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:05:34,244 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:05:34,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:05:34,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:05:34,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:05:34,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:05:34,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:05:34,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:05:34,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:05:36,223 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:05:36,223 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 09:05:36,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:05:36 BoogieIcfgContainer [2020-12-22 09:05:36,226 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:05:36,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:05:36,228 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:05:36,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:05:36,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:05:32" (1/3) ... [2020-12-22 09:05:36,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29ceaadd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:05:36, skipping insertion in model container [2020-12-22 09:05:36,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:34" (2/3) ... [2020-12-22 09:05:36,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29ceaadd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:05:36, skipping insertion in model container [2020-12-22 09:05:36,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:05:36" (3/3) ... [2020-12-22 09:05:36,235 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 09:05:36,242 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:05:36,248 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 09:05:36,269 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 09:05:36,300 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:05:36,300 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:05:36,300 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:05:36,301 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:05:36,301 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:05:36,301 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:05:36,301 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:05:36,301 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:05:36,325 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states. [2020-12-22 09:05:36,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-12-22 09:05:36,342 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:36,344 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] [2020-12-22 09:05:36,344 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:36,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:36,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1491324598, now seen corresponding path program 1 times [2020-12-22 09:05:36,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:36,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006405223] [2020-12-22 09:05:36,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:36,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:05:37,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006405223] [2020-12-22 09:05:37,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:37,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:05:37,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140113511] [2020-12-22 09:05:37,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:05:37,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:37,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:05:37,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:37,092 INFO L87 Difference]: Start difference. First operand 344 states. Second operand 3 states. [2020-12-22 09:05:37,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:37,360 INFO L93 Difference]: Finished difference Result 702 states and 1220 transitions. [2020-12-22 09:05:37,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:05:37,362 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 155 [2020-12-22 09:05:37,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:37,384 INFO L225 Difference]: With dead ends: 702 [2020-12-22 09:05:37,384 INFO L226 Difference]: Without dead ends: 565 [2020-12-22 09:05:37,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:37,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2020-12-22 09:05:37,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 563. [2020-12-22 09:05:37,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 563 states. [2020-12-22 09:05:37,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 842 transitions. [2020-12-22 09:05:37,503 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 842 transitions. Word has length 155 [2020-12-22 09:05:37,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:37,506 INFO L481 AbstractCegarLoop]: Abstraction has 563 states and 842 transitions. [2020-12-22 09:05:37,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:05:37,506 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 842 transitions. [2020-12-22 09:05:37,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-12-22 09:05:37,519 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:37,519 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] [2020-12-22 09:05:37,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:05:37,520 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:37,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:37,521 INFO L82 PathProgramCache]: Analyzing trace with hash -599043347, now seen corresponding path program 1 times [2020-12-22 09:05:37,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:37,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096934740] [2020-12-22 09:05:37,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:37,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:37,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:05:37,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096934740] [2020-12-22 09:05:37,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:37,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:05:37,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477920370] [2020-12-22 09:05:37,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:05:37,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:37,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:05:37,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:05:37,916 INFO L87 Difference]: Start difference. First operand 563 states and 842 transitions. Second operand 4 states. [2020-12-22 09:05:38,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:38,137 INFO L93 Difference]: Finished difference Result 1643 states and 2449 transitions. [2020-12-22 09:05:38,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:05:38,138 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 155 [2020-12-22 09:05:38,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:38,178 INFO L225 Difference]: With dead ends: 1643 [2020-12-22 09:05:38,179 INFO L226 Difference]: Without dead ends: 1089 [2020-12-22 09:05:38,187 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 09:05:38,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2020-12-22 09:05:38,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 1087. [2020-12-22 09:05:38,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1087 states. [2020-12-22 09:05:38,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 1608 transitions. [2020-12-22 09:05:38,261 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 1608 transitions. Word has length 155 [2020-12-22 09:05:38,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:38,261 INFO L481 AbstractCegarLoop]: Abstraction has 1087 states and 1608 transitions. [2020-12-22 09:05:38,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:05:38,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 1608 transitions. [2020-12-22 09:05:38,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-22 09:05:38,265 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:38,265 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 09:05:38,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:05:38,266 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:38,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:38,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1611010681, now seen corresponding path program 1 times [2020-12-22 09:05:38,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:38,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132273519] [2020-12-22 09:05:38,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:38,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:38,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:05:38,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132273519] [2020-12-22 09:05:38,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:38,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:05:38,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705038119] [2020-12-22 09:05:38,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:05:38,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:38,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:05:38,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:38,344 INFO L87 Difference]: Start difference. First operand 1087 states and 1608 transitions. Second operand 3 states. [2020-12-22 09:05:38,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:38,450 INFO L93 Difference]: Finished difference Result 3223 states and 4762 transitions. [2020-12-22 09:05:38,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:05:38,451 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 156 [2020-12-22 09:05:38,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:38,469 INFO L225 Difference]: With dead ends: 3223 [2020-12-22 09:05:38,469 INFO L226 Difference]: Without dead ends: 2164 [2020-12-22 09:05:38,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:38,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2164 states. [2020-12-22 09:05:38,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2164 to 1089. [2020-12-22 09:05:38,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1089 states. [2020-12-22 09:05:38,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1610 transitions. [2020-12-22 09:05:38,575 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1610 transitions. Word has length 156 [2020-12-22 09:05:38,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:38,575 INFO L481 AbstractCegarLoop]: Abstraction has 1089 states and 1610 transitions. [2020-12-22 09:05:38,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:05:38,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1610 transitions. [2020-12-22 09:05:38,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-12-22 09:05:38,579 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:38,579 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] [2020-12-22 09:05:38,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:05:38,580 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:38,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:38,580 INFO L82 PathProgramCache]: Analyzing trace with hash -580833396, now seen corresponding path program 1 times [2020-12-22 09:05:38,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:38,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703100605] [2020-12-22 09:05:38,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:38,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:05:38,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703100605] [2020-12-22 09:05:38,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:38,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:05:38,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081601483] [2020-12-22 09:05:38,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:05:38,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:38,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:05:38,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:05:38,987 INFO L87 Difference]: Start difference. First operand 1089 states and 1610 transitions. Second operand 4 states. [2020-12-22 09:05:39,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:39,273 INFO L93 Difference]: Finished difference Result 3149 states and 4634 transitions. [2020-12-22 09:05:39,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:05:39,274 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 157 [2020-12-22 09:05:39,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:39,291 INFO L225 Difference]: With dead ends: 3149 [2020-12-22 09:05:39,292 INFO L226 Difference]: Without dead ends: 2090 [2020-12-22 09:05:39,295 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 09:05:39,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2020-12-22 09:05:39,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2020-12-22 09:05:39,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-12-22 09:05:39,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3048 transitions. [2020-12-22 09:05:39,486 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3048 transitions. Word has length 157 [2020-12-22 09:05:39,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:39,486 INFO L481 AbstractCegarLoop]: Abstraction has 2088 states and 3048 transitions. [2020-12-22 09:05:39,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:05:39,487 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3048 transitions. [2020-12-22 09:05:39,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-22 09:05:39,492 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:39,492 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 09:05:39,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:05:39,493 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:39,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:39,493 INFO L82 PathProgramCache]: Analyzing trace with hash 268848056, now seen corresponding path program 1 times [2020-12-22 09:05:39,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:39,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871184214] [2020-12-22 09:05:39,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:39,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:39,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:05:39,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871184214] [2020-12-22 09:05:39,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:39,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:05:39,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629414006] [2020-12-22 09:05:39,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:05:39,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:39,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:05:39,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:39,607 INFO L87 Difference]: Start difference. First operand 2088 states and 3048 transitions. Second operand 3 states. [2020-12-22 09:05:39,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:39,893 INFO L93 Difference]: Finished difference Result 6188 states and 9024 transitions. [2020-12-22 09:05:39,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:05:39,896 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 158 [2020-12-22 09:05:39,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:39,919 INFO L225 Difference]: With dead ends: 6188 [2020-12-22 09:05:39,919 INFO L226 Difference]: Without dead ends: 4144 [2020-12-22 09:05:39,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:39,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2020-12-22 09:05:40,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 2092. [2020-12-22 09:05:40,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2092 states. [2020-12-22 09:05:40,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 3052 transitions. [2020-12-22 09:05:40,154 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 3052 transitions. Word has length 158 [2020-12-22 09:05:40,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:40,155 INFO L481 AbstractCegarLoop]: Abstraction has 2092 states and 3052 transitions. [2020-12-22 09:05:40,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:05:40,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 3052 transitions. [2020-12-22 09:05:40,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-22 09:05:40,159 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:40,159 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] [2020-12-22 09:05:40,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:05:40,160 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:40,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:40,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1767168465, now seen corresponding path program 1 times [2020-12-22 09:05:40,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:40,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127487515] [2020-12-22 09:05:40,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:40,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:40,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:05:40,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127487515] [2020-12-22 09:05:40,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:40,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:05:40,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702830261] [2020-12-22 09:05:40,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:05:40,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:40,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:05:40,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:40,291 INFO L87 Difference]: Start difference. First operand 2092 states and 3052 transitions. Second operand 3 states. [2020-12-22 09:05:40,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:40,697 INFO L93 Difference]: Finished difference Result 5411 states and 7901 transitions. [2020-12-22 09:05:40,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:05:40,699 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 159 [2020-12-22 09:05:40,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:40,725 INFO L225 Difference]: With dead ends: 5411 [2020-12-22 09:05:40,725 INFO L226 Difference]: Without dead ends: 3651 [2020-12-22 09:05:40,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:40,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3651 states. [2020-12-22 09:05:41,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3651 to 3649. [2020-12-22 09:05:41,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3649 states. [2020-12-22 09:05:41,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3649 states to 3649 states and 5243 transitions. [2020-12-22 09:05:41,161 INFO L78 Accepts]: Start accepts. Automaton has 3649 states and 5243 transitions. Word has length 159 [2020-12-22 09:05:41,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:41,163 INFO L481 AbstractCegarLoop]: Abstraction has 3649 states and 5243 transitions. [2020-12-22 09:05:41,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:05:41,163 INFO L276 IsEmpty]: Start isEmpty. Operand 3649 states and 5243 transitions. [2020-12-22 09:05:41,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-22 09:05:41,170 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:41,171 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] [2020-12-22 09:05:41,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:05:41,171 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:41,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:41,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1188374862, now seen corresponding path program 1 times [2020-12-22 09:05:41,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:41,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103615877] [2020-12-22 09:05:41,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:41,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:41,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:05:41,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103615877] [2020-12-22 09:05:41,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:41,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:05:41,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848499678] [2020-12-22 09:05:41,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:05:41,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:41,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:05:41,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:05:41,461 INFO L87 Difference]: Start difference. First operand 3649 states and 5243 transitions. Second operand 5 states. [2020-12-22 09:05:42,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:42,056 INFO L93 Difference]: Finished difference Result 10381 states and 14906 transitions. [2020-12-22 09:05:42,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:05:42,057 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 159 [2020-12-22 09:05:42,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:42,092 INFO L225 Difference]: With dead ends: 10381 [2020-12-22 09:05:42,092 INFO L226 Difference]: Without dead ends: 6769 [2020-12-22 09:05:42,100 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 09:05:42,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6769 states. [2020-12-22 09:05:42,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6769 to 6767. [2020-12-22 09:05:42,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6767 states. [2020-12-22 09:05:42,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6767 states to 6767 states and 9634 transitions. [2020-12-22 09:05:42,674 INFO L78 Accepts]: Start accepts. Automaton has 6767 states and 9634 transitions. Word has length 159 [2020-12-22 09:05:42,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:42,675 INFO L481 AbstractCegarLoop]: Abstraction has 6767 states and 9634 transitions. [2020-12-22 09:05:42,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:05:42,675 INFO L276 IsEmpty]: Start isEmpty. Operand 6767 states and 9634 transitions. [2020-12-22 09:05:42,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-22 09:05:42,685 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:42,685 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] [2020-12-22 09:05:42,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:05:42,686 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:42,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:42,686 INFO L82 PathProgramCache]: Analyzing trace with hash 504620971, now seen corresponding path program 1 times [2020-12-22 09:05:42,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:42,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708717787] [2020-12-22 09:05:42,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:42,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:42,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:05:42,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708717787] [2020-12-22 09:05:42,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:42,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:05:42,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456498584] [2020-12-22 09:05:42,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:05:42,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:42,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:05:42,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:05:42,919 INFO L87 Difference]: Start difference. First operand 6767 states and 9634 transitions. Second operand 4 states. [2020-12-22 09:05:43,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:43,491 INFO L93 Difference]: Finished difference Result 13796 states and 19550 transitions. [2020-12-22 09:05:43,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:05:43,492 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 159 [2020-12-22 09:05:43,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:43,525 INFO L225 Difference]: With dead ends: 13796 [2020-12-22 09:05:43,526 INFO L226 Difference]: Without dead ends: 7146 [2020-12-22 09:05:43,535 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 09:05:43,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7146 states. [2020-12-22 09:05:44,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7146 to 6991. [2020-12-22 09:05:44,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6991 states. [2020-12-22 09:05:44,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6991 states to 6991 states and 9886 transitions. [2020-12-22 09:05:44,059 INFO L78 Accepts]: Start accepts. Automaton has 6991 states and 9886 transitions. Word has length 159 [2020-12-22 09:05:44,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:44,059 INFO L481 AbstractCegarLoop]: Abstraction has 6991 states and 9886 transitions. [2020-12-22 09:05:44,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:05:44,059 INFO L276 IsEmpty]: Start isEmpty. Operand 6991 states and 9886 transitions. [2020-12-22 09:05:44,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 09:05:44,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:44,073 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] [2020-12-22 09:05:44,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:05:44,074 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:44,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:44,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1391753097, now seen corresponding path program 1 times [2020-12-22 09:05:44,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:44,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101981592] [2020-12-22 09:05:44,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:44,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:05:44,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101981592] [2020-12-22 09:05:44,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:44,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:05:44,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713768756] [2020-12-22 09:05:44,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:05:44,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:44,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:05:44,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:44,155 INFO L87 Difference]: Start difference. First operand 6991 states and 9886 transitions. Second operand 3 states. [2020-12-22 09:05:45,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:45,005 INFO L93 Difference]: Finished difference Result 20247 states and 28724 transitions. [2020-12-22 09:05:45,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:05:45,007 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 160 [2020-12-22 09:05:45,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:45,042 INFO L225 Difference]: With dead ends: 20247 [2020-12-22 09:05:45,042 INFO L226 Difference]: Without dead ends: 13857 [2020-12-22 09:05:45,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:45,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13857 states. [2020-12-22 09:05:45,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13857 to 7007. [2020-12-22 09:05:45,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7007 states. [2020-12-22 09:05:45,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7007 states to 7007 states and 9902 transitions. [2020-12-22 09:05:45,673 INFO L78 Accepts]: Start accepts. Automaton has 7007 states and 9902 transitions. Word has length 160 [2020-12-22 09:05:45,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:45,673 INFO L481 AbstractCegarLoop]: Abstraction has 7007 states and 9902 transitions. [2020-12-22 09:05:45,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:05:45,673 INFO L276 IsEmpty]: Start isEmpty. Operand 7007 states and 9902 transitions. [2020-12-22 09:05:45,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-22 09:05:45,687 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:45,688 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] [2020-12-22 09:05:45,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:05:45,688 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:45,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:45,689 INFO L82 PathProgramCache]: Analyzing trace with hash -911721654, now seen corresponding path program 1 times [2020-12-22 09:05:45,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:45,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555342556] [2020-12-22 09:05:45,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:45,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:05:45,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555342556] [2020-12-22 09:05:45,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:45,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:05:45,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730037810] [2020-12-22 09:05:45,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:05:45,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:45,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:05:45,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:05:45,928 INFO L87 Difference]: Start difference. First operand 7007 states and 9902 transitions. Second operand 4 states. [2020-12-22 09:05:46,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:46,441 INFO L93 Difference]: Finished difference Result 14004 states and 19790 transitions. [2020-12-22 09:05:46,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:05:46,443 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 161 [2020-12-22 09:05:46,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:46,459 INFO L225 Difference]: With dead ends: 14004 [2020-12-22 09:05:46,459 INFO L226 Difference]: Without dead ends: 7005 [2020-12-22 09:05:46,468 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 09:05:46,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7005 states. [2020-12-22 09:05:46,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7005 to 7005. [2020-12-22 09:05:46,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7005 states. [2020-12-22 09:05:46,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7005 states to 7005 states and 9898 transitions. [2020-12-22 09:05:46,925 INFO L78 Accepts]: Start accepts. Automaton has 7005 states and 9898 transitions. Word has length 161 [2020-12-22 09:05:46,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:46,925 INFO L481 AbstractCegarLoop]: Abstraction has 7005 states and 9898 transitions. [2020-12-22 09:05:46,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:05:46,926 INFO L276 IsEmpty]: Start isEmpty. Operand 7005 states and 9898 transitions. [2020-12-22 09:05:46,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-22 09:05:46,937 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:46,938 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] [2020-12-22 09:05:46,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:05:46,938 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:46,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:46,939 INFO L82 PathProgramCache]: Analyzing trace with hash -2124598414, now seen corresponding path program 1 times [2020-12-22 09:05:46,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:46,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44347632] [2020-12-22 09:05:46,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:46,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:47,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:05:47,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44347632] [2020-12-22 09:05:47,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:47,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:05:47,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446948611] [2020-12-22 09:05:47,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:05:47,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:47,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:05:47,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:47,106 INFO L87 Difference]: Start difference. First operand 7005 states and 9898 transitions. Second operand 3 states. [2020-12-22 09:05:47,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:47,823 INFO L93 Difference]: Finished difference Result 16189 states and 22982 transitions. [2020-12-22 09:05:47,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:05:47,824 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2020-12-22 09:05:47,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:47,846 INFO L225 Difference]: With dead ends: 16189 [2020-12-22 09:05:47,846 INFO L226 Difference]: Without dead ends: 10395 [2020-12-22 09:05:47,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:47,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10395 states. [2020-12-22 09:05:48,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10395 to 10393. [2020-12-22 09:05:48,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10393 states. [2020-12-22 09:05:48,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10393 states to 10393 states and 14460 transitions. [2020-12-22 09:05:48,947 INFO L78 Accepts]: Start accepts. Automaton has 10393 states and 14460 transitions. Word has length 161 [2020-12-22 09:05:48,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:48,947 INFO L481 AbstractCegarLoop]: Abstraction has 10393 states and 14460 transitions. [2020-12-22 09:05:48,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:05:48,947 INFO L276 IsEmpty]: Start isEmpty. Operand 10393 states and 14460 transitions. [2020-12-22 09:05:48,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-22 09:05:48,964 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:48,965 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] [2020-12-22 09:05:48,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:05:48,965 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:48,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:48,966 INFO L82 PathProgramCache]: Analyzing trace with hash -727385235, now seen corresponding path program 1 times [2020-12-22 09:05:48,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:48,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226404261] [2020-12-22 09:05:48,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:48,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:49,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:05:49,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226404261] [2020-12-22 09:05:49,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:49,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:05:49,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500083227] [2020-12-22 09:05:49,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:05:49,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:49,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:05:49,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:49,067 INFO L87 Difference]: Start difference. First operand 10393 states and 14460 transitions. Second operand 3 states. [2020-12-22 09:05:49,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:49,938 INFO L93 Difference]: Finished difference Result 24303 states and 34628 transitions. [2020-12-22 09:05:49,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:05:49,939 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 163 [2020-12-22 09:05:49,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:49,976 INFO L225 Difference]: With dead ends: 24303 [2020-12-22 09:05:49,976 INFO L226 Difference]: Without dead ends: 15108 [2020-12-22 09:05:49,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:50,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15108 states. [2020-12-22 09:05:51,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15108 to 13181. [2020-12-22 09:05:51,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13181 states. [2020-12-22 09:05:51,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13181 states to 13181 states and 18914 transitions. [2020-12-22 09:05:51,137 INFO L78 Accepts]: Start accepts. Automaton has 13181 states and 18914 transitions. Word has length 163 [2020-12-22 09:05:51,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:51,138 INFO L481 AbstractCegarLoop]: Abstraction has 13181 states and 18914 transitions. [2020-12-22 09:05:51,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:05:51,138 INFO L276 IsEmpty]: Start isEmpty. Operand 13181 states and 18914 transitions. [2020-12-22 09:05:51,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-12-22 09:05:51,160 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:51,160 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, 1] [2020-12-22 09:05:51,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:05:51,160 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:51,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:51,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1248523357, now seen corresponding path program 1 times [2020-12-22 09:05:51,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:51,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163552911] [2020-12-22 09:05:51,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:51,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:05:51,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163552911] [2020-12-22 09:05:51,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:51,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:05:51,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443618923] [2020-12-22 09:05:51,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:05:51,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:51,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:05:51,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:51,250 INFO L87 Difference]: Start difference. First operand 13181 states and 18914 transitions. Second operand 3 states. [2020-12-22 09:05:52,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:52,277 INFO L93 Difference]: Finished difference Result 29139 states and 42714 transitions. [2020-12-22 09:05:52,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:05:52,277 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 165 [2020-12-22 09:05:52,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:52,327 INFO L225 Difference]: With dead ends: 29139 [2020-12-22 09:05:52,328 INFO L226 Difference]: Without dead ends: 19243 [2020-12-22 09:05:52,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:52,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19243 states. [2020-12-22 09:05:53,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19243 to 17437. [2020-12-22 09:05:53,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17437 states. [2020-12-22 09:05:53,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17437 states to 17437 states and 25648 transitions. [2020-12-22 09:05:53,829 INFO L78 Accepts]: Start accepts. Automaton has 17437 states and 25648 transitions. Word has length 165 [2020-12-22 09:05:53,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:53,829 INFO L481 AbstractCegarLoop]: Abstraction has 17437 states and 25648 transitions. [2020-12-22 09:05:53,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:05:53,829 INFO L276 IsEmpty]: Start isEmpty. Operand 17437 states and 25648 transitions. [2020-12-22 09:05:53,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 09:05:53,844 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:53,845 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, 1, 1] [2020-12-22 09:05:53,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:05:53,845 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:53,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:53,846 INFO L82 PathProgramCache]: Analyzing trace with hash -846552929, now seen corresponding path program 1 times [2020-12-22 09:05:53,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:53,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551591045] [2020-12-22 09:05:53,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:53,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:05:53,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551591045] [2020-12-22 09:05:53,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:53,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:05:53,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845645817] [2020-12-22 09:05:53,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:05:53,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:53,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:05:53,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:05:53,996 INFO L87 Difference]: Start difference. First operand 17437 states and 25648 transitions. Second operand 5 states. [2020-12-22 09:05:55,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:55,388 INFO L93 Difference]: Finished difference Result 33724 states and 49986 transitions. [2020-12-22 09:05:55,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:05:55,388 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 166 [2020-12-22 09:05:55,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:55,420 INFO L225 Difference]: With dead ends: 33724 [2020-12-22 09:05:55,420 INFO L226 Difference]: Without dead ends: 17437 [2020-12-22 09:05:55,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:05:55,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17437 states. [2020-12-22 09:05:56,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17437 to 17437. [2020-12-22 09:05:56,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17437 states. [2020-12-22 09:05:56,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17437 states to 17437 states and 25410 transitions. [2020-12-22 09:05:56,744 INFO L78 Accepts]: Start accepts. Automaton has 17437 states and 25410 transitions. Word has length 166 [2020-12-22 09:05:56,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:56,744 INFO L481 AbstractCegarLoop]: Abstraction has 17437 states and 25410 transitions. [2020-12-22 09:05:56,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:05:56,744 INFO L276 IsEmpty]: Start isEmpty. Operand 17437 states and 25410 transitions. [2020-12-22 09:05:56,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 09:05:56,758 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:56,758 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, 1, 1] [2020-12-22 09:05:56,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:05:56,759 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:56,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:56,759 INFO L82 PathProgramCache]: Analyzing trace with hash -316024710, now seen corresponding path program 1 times [2020-12-22 09:05:56,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:56,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456833411] [2020-12-22 09:05:56,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:56,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:56,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:05:56,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456833411] [2020-12-22 09:05:56,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:56,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:05:56,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874676587] [2020-12-22 09:05:56,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:05:56,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:56,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:05:56,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:05:56,925 INFO L87 Difference]: Start difference. First operand 17437 states and 25410 transitions. Second operand 4 states. [2020-12-22 09:05:58,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:58,851 INFO L93 Difference]: Finished difference Result 43679 states and 65710 transitions. [2020-12-22 09:05:58,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:05:58,852 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2020-12-22 09:05:58,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:58,887 INFO L225 Difference]: With dead ends: 43679 [2020-12-22 09:05:58,887 INFO L226 Difference]: Without dead ends: 32388 [2020-12-22 09:05:58,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 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 09:05:58,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32388 states. [2020-12-22 09:06:01,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32388 to 32386. [2020-12-22 09:06:01,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32386 states. [2020-12-22 09:06:01,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32386 states to 32386 states and 47679 transitions. [2020-12-22 09:06:01,558 INFO L78 Accepts]: Start accepts. Automaton has 32386 states and 47679 transitions. Word has length 166 [2020-12-22 09:06:01,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:01,559 INFO L481 AbstractCegarLoop]: Abstraction has 32386 states and 47679 transitions. [2020-12-22 09:06:01,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:06:01,559 INFO L276 IsEmpty]: Start isEmpty. Operand 32386 states and 47679 transitions. [2020-12-22 09:06:01,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 09:06:01,574 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:01,575 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, 1, 1] [2020-12-22 09:06:01,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:06:01,575 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:01,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:01,576 INFO L82 PathProgramCache]: Analyzing trace with hash 105363050, now seen corresponding path program 1 times [2020-12-22 09:06:01,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:01,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142087234] [2020-12-22 09:06:01,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:01,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:06:01,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142087234] [2020-12-22 09:06:01,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:01,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:06:01,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722699839] [2020-12-22 09:06:01,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:06:01,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:01,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:06:01,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:06:01,747 INFO L87 Difference]: Start difference. First operand 32386 states and 47679 transitions. Second operand 4 states. [2020-12-22 09:06:05,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:05,416 INFO L93 Difference]: Finished difference Result 83811 states and 123599 transitions. [2020-12-22 09:06:05,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:06:05,418 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2020-12-22 09:06:05,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:05,502 INFO L225 Difference]: With dead ends: 83811 [2020-12-22 09:06:05,502 INFO L226 Difference]: Without dead ends: 51773 [2020-12-22 09:06:05,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:06:05,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51773 states. [2020-12-22 09:06:09,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51773 to 51771. [2020-12-22 09:06:09,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51771 states. [2020-12-22 09:06:09,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51771 states to 51771 states and 75498 transitions. [2020-12-22 09:06:09,669 INFO L78 Accepts]: Start accepts. Automaton has 51771 states and 75498 transitions. Word has length 166 [2020-12-22 09:06:09,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:09,669 INFO L481 AbstractCegarLoop]: Abstraction has 51771 states and 75498 transitions. [2020-12-22 09:06:09,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:06:09,669 INFO L276 IsEmpty]: Start isEmpty. Operand 51771 states and 75498 transitions. [2020-12-22 09:06:09,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-12-22 09:06:09,686 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:09,686 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, 1, 1, 1, 1] [2020-12-22 09:06:09,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:06:09,687 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:09,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:09,687 INFO L82 PathProgramCache]: Analyzing trace with hash 781133202, now seen corresponding path program 1 times [2020-12-22 09:06:09,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:09,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902397929] [2020-12-22 09:06:09,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:09,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:06:09,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902397929] [2020-12-22 09:06:09,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:09,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:06:09,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947139407] [2020-12-22 09:06:09,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:06:09,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:09,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:06:09,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:06:09,995 INFO L87 Difference]: Start difference. First operand 51771 states and 75498 transitions. Second operand 4 states. [2020-12-22 09:06:13,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:13,297 INFO L93 Difference]: Finished difference Result 82457 states and 120204 transitions. [2020-12-22 09:06:13,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:06:13,297 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 168 [2020-12-22 09:06:13,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:13,344 INFO L225 Difference]: With dead ends: 82457 [2020-12-22 09:06:13,344 INFO L226 Difference]: Without dead ends: 42355 [2020-12-22 09:06:13,368 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 09:06:13,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42355 states. [2020-12-22 09:06:16,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42355 to 42355. [2020-12-22 09:06:16,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42355 states. [2020-12-22 09:06:16,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42355 states to 42355 states and 61571 transitions. [2020-12-22 09:06:16,658 INFO L78 Accepts]: Start accepts. Automaton has 42355 states and 61571 transitions. Word has length 168 [2020-12-22 09:06:16,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:16,658 INFO L481 AbstractCegarLoop]: Abstraction has 42355 states and 61571 transitions. [2020-12-22 09:06:16,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:06:16,658 INFO L276 IsEmpty]: Start isEmpty. Operand 42355 states and 61571 transitions. [2020-12-22 09:06:16,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-12-22 09:06:16,781 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:16,781 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:06:16,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:06:16,781 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:16,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:16,782 INFO L82 PathProgramCache]: Analyzing trace with hash 227102220, now seen corresponding path program 1 times [2020-12-22 09:06:16,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:16,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508804748] [2020-12-22 09:06:16,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:16,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:16,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:06:16,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508804748] [2020-12-22 09:06:16,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:16,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:06:16,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112157823] [2020-12-22 09:06:16,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:06:16,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:16,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:06:16,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:06:16,862 INFO L87 Difference]: Start difference. First operand 42355 states and 61571 transitions. Second operand 3 states. [2020-12-22 09:06:21,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:21,485 INFO L93 Difference]: Finished difference Result 101038 states and 148810 transitions. [2020-12-22 09:06:21,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:06:21,486 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 172 [2020-12-22 09:06:21,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:21,574 INFO L225 Difference]: With dead ends: 101038 [2020-12-22 09:06:21,575 INFO L226 Difference]: Without dead ends: 66401 [2020-12-22 09:06:21,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:06:21,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66401 states. [2020-12-22 09:06:26,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66401 to 60491. [2020-12-22 09:06:26,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60491 states. [2020-12-22 09:06:26,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60491 states to 60491 states and 89739 transitions. [2020-12-22 09:06:26,571 INFO L78 Accepts]: Start accepts. Automaton has 60491 states and 89739 transitions. Word has length 172 [2020-12-22 09:06:26,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:26,571 INFO L481 AbstractCegarLoop]: Abstraction has 60491 states and 89739 transitions. [2020-12-22 09:06:26,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:06:26,572 INFO L276 IsEmpty]: Start isEmpty. Operand 60491 states and 89739 transitions. [2020-12-22 09:06:26,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-22 09:06:26,589 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:26,589 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:06:26,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:06:26,589 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:26,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:26,590 INFO L82 PathProgramCache]: Analyzing trace with hash 2038386929, now seen corresponding path program 1 times [2020-12-22 09:06:26,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:26,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282294659] [2020-12-22 09:06:26,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:26,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:26,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:06:26,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282294659] [2020-12-22 09:06:26,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:26,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:06:26,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182654621] [2020-12-22 09:06:26,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:06:26,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:26,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:06:26,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:06:26,817 INFO L87 Difference]: Start difference. First operand 60491 states and 89739 transitions. Second operand 4 states. [2020-12-22 09:06:30,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:30,929 INFO L93 Difference]: Finished difference Result 109368 states and 162428 transitions. [2020-12-22 09:06:30,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:06:30,930 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 173 [2020-12-22 09:06:30,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:30,989 INFO L225 Difference]: With dead ends: 109368 [2020-12-22 09:06:30,989 INFO L226 Difference]: Without dead ends: 48947 [2020-12-22 09:06:31,018 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 09:06:31,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48947 states. [2020-12-22 09:06:34,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48947 to 48947. [2020-12-22 09:06:34,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48947 states. [2020-12-22 09:06:35,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48947 states to 48947 states and 72775 transitions. [2020-12-22 09:06:35,051 INFO L78 Accepts]: Start accepts. Automaton has 48947 states and 72775 transitions. Word has length 173 [2020-12-22 09:06:35,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:35,051 INFO L481 AbstractCegarLoop]: Abstraction has 48947 states and 72775 transitions. [2020-12-22 09:06:35,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:06:35,051 INFO L276 IsEmpty]: Start isEmpty. Operand 48947 states and 72775 transitions. [2020-12-22 09:06:35,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-12-22 09:06:35,065 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:35,065 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:06:35,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:06:35,066 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:35,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:35,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1840353834, now seen corresponding path program 1 times [2020-12-22 09:06:35,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:35,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491355651] [2020-12-22 09:06:35,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:35,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:06:35,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491355651] [2020-12-22 09:06:35,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:35,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:06:35,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254783612] [2020-12-22 09:06:35,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:06:35,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:35,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:06:35,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:06:35,199 INFO L87 Difference]: Start difference. First operand 48947 states and 72775 transitions. Second operand 4 states. [2020-12-22 09:06:40,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:40,342 INFO L93 Difference]: Finished difference Result 90451 states and 136296 transitions. [2020-12-22 09:06:40,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:06:40,343 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 180 [2020-12-22 09:06:40,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:40,430 INFO L225 Difference]: With dead ends: 90451 [2020-12-22 09:06:40,431 INFO L226 Difference]: Without dead ends: 68813 [2020-12-22 09:06:40,449 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 09:06:40,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68813 states. [2020-12-22 09:06:44,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68813 to 48895. [2020-12-22 09:06:44,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48895 states. [2020-12-22 09:06:44,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48895 states to 48895 states and 72649 transitions. [2020-12-22 09:06:44,535 INFO L78 Accepts]: Start accepts. Automaton has 48895 states and 72649 transitions. Word has length 180 [2020-12-22 09:06:44,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:44,536 INFO L481 AbstractCegarLoop]: Abstraction has 48895 states and 72649 transitions. [2020-12-22 09:06:44,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:06:44,536 INFO L276 IsEmpty]: Start isEmpty. Operand 48895 states and 72649 transitions. [2020-12-22 09:06:44,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-12-22 09:06:44,548 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:44,548 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:06:44,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:06:44,549 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:44,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:44,549 INFO L82 PathProgramCache]: Analyzing trace with hash -300864981, now seen corresponding path program 1 times [2020-12-22 09:06:44,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:44,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188965416] [2020-12-22 09:06:44,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:44,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:44,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:06:44,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188965416] [2020-12-22 09:06:44,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:44,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:06:44,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768619385] [2020-12-22 09:06:44,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:06:44,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:44,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:06:44,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:06:44,706 INFO L87 Difference]: Start difference. First operand 48895 states and 72649 transitions. Second operand 4 states. [2020-12-22 09:06:48,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:48,215 INFO L93 Difference]: Finished difference Result 85610 states and 127107 transitions. [2020-12-22 09:06:48,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:06:48,216 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 180 [2020-12-22 09:06:48,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:48,280 INFO L225 Difference]: With dead ends: 85610 [2020-12-22 09:06:48,280 INFO L226 Difference]: Without dead ends: 48885 [2020-12-22 09:06:48,307 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 09:06:48,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48885 states. [2020-12-22 09:06:52,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48885 to 48885. [2020-12-22 09:06:52,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48885 states. [2020-12-22 09:06:52,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48885 states to 48885 states and 72634 transitions. [2020-12-22 09:06:52,249 INFO L78 Accepts]: Start accepts. Automaton has 48885 states and 72634 transitions. Word has length 180 [2020-12-22 09:06:52,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:52,249 INFO L481 AbstractCegarLoop]: Abstraction has 48885 states and 72634 transitions. [2020-12-22 09:06:52,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:06:52,250 INFO L276 IsEmpty]: Start isEmpty. Operand 48885 states and 72634 transitions. [2020-12-22 09:06:52,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-12-22 09:06:52,258 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:52,259 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:06:52,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:06:52,259 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:52,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:52,259 INFO L82 PathProgramCache]: Analyzing trace with hash 448768331, now seen corresponding path program 1 times [2020-12-22 09:06:52,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:52,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955132042] [2020-12-22 09:06:52,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:52,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:06:52,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955132042] [2020-12-22 09:06:52,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:52,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:06:52,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133772833] [2020-12-22 09:06:52,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:06:52,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:52,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:06:52,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:06:52,482 INFO L87 Difference]: Start difference. First operand 48885 states and 72634 transitions. Second operand 5 states. [2020-12-22 09:06:56,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:56,414 INFO L93 Difference]: Finished difference Result 93419 states and 138860 transitions. [2020-12-22 09:06:56,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:06:56,417 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 180 [2020-12-22 09:06:56,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:56,470 INFO L225 Difference]: With dead ends: 93419 [2020-12-22 09:06:56,470 INFO L226 Difference]: Without dead ends: 44797 [2020-12-22 09:06:56,490 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 09:06:56,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44797 states. [2020-12-22 09:07:00,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44797 to 44640. [2020-12-22 09:07:00,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44640 states. [2020-12-22 09:07:00,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44640 states to 44640 states and 66329 transitions. [2020-12-22 09:07:00,215 INFO L78 Accepts]: Start accepts. Automaton has 44640 states and 66329 transitions. Word has length 180 [2020-12-22 09:07:00,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:00,216 INFO L481 AbstractCegarLoop]: Abstraction has 44640 states and 66329 transitions. [2020-12-22 09:07:00,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:07:00,216 INFO L276 IsEmpty]: Start isEmpty. Operand 44640 states and 66329 transitions. [2020-12-22 09:07:00,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-12-22 09:07:00,224 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:00,225 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:07:00,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:07:00,225 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:00,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:00,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1759160890, now seen corresponding path program 1 times [2020-12-22 09:07:00,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:00,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701229671] [2020-12-22 09:07:00,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:00,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:07:00,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701229671] [2020-12-22 09:07:00,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:00,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:07:00,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525861032] [2020-12-22 09:07:00,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:07:00,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:00,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:07:00,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:07:00,368 INFO L87 Difference]: Start difference. First operand 44640 states and 66329 transitions. Second operand 5 states. [2020-12-22 09:07:04,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:04,523 INFO L93 Difference]: Finished difference Result 88270 states and 131554 transitions. [2020-12-22 09:07:04,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:07:04,524 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 182 [2020-12-22 09:07:04,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:04,575 INFO L225 Difference]: With dead ends: 88270 [2020-12-22 09:07:04,575 INFO L226 Difference]: Without dead ends: 44640 [2020-12-22 09:07:04,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:07:04,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44640 states. [2020-12-22 09:07:08,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44640 to 44640. [2020-12-22 09:07:08,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44640 states. [2020-12-22 09:07:08,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44640 states to 44640 states and 65783 transitions. [2020-12-22 09:07:08,515 INFO L78 Accepts]: Start accepts. Automaton has 44640 states and 65783 transitions. Word has length 182 [2020-12-22 09:07:08,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:08,515 INFO L481 AbstractCegarLoop]: Abstraction has 44640 states and 65783 transitions. [2020-12-22 09:07:08,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:07:08,515 INFO L276 IsEmpty]: Start isEmpty. Operand 44640 states and 65783 transitions. [2020-12-22 09:07:08,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-12-22 09:07:08,524 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:08,524 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:07:08,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:07:08,524 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:08,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:08,525 INFO L82 PathProgramCache]: Analyzing trace with hash 570816981, now seen corresponding path program 1 times [2020-12-22 09:07:08,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:08,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756366043] [2020-12-22 09:07:08,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:08,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:08,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:07:08,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756366043] [2020-12-22 09:07:08,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:08,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:07:08,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288767700] [2020-12-22 09:07:08,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:07:08,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:08,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:07:08,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:07:08,717 INFO L87 Difference]: Start difference. First operand 44640 states and 65783 transitions. Second operand 6 states. [2020-12-22 09:07:19,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:19,369 INFO L93 Difference]: Finished difference Result 164932 states and 246184 transitions. [2020-12-22 09:07:19,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:07:19,370 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 182 [2020-12-22 09:07:19,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:19,553 INFO L225 Difference]: With dead ends: 164932 [2020-12-22 09:07:19,553 INFO L226 Difference]: Without dead ends: 121522 [2020-12-22 09:07:19,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:07:19,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121522 states. [2020-12-22 09:07:30,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121522 to 121518. [2020-12-22 09:07:30,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121518 states. [2020-12-22 09:07:30,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121518 states to 121518 states and 181213 transitions. [2020-12-22 09:07:30,784 INFO L78 Accepts]: Start accepts. Automaton has 121518 states and 181213 transitions. Word has length 182 [2020-12-22 09:07:30,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:30,785 INFO L481 AbstractCegarLoop]: Abstraction has 121518 states and 181213 transitions. [2020-12-22 09:07:30,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:07:30,785 INFO L276 IsEmpty]: Start isEmpty. Operand 121518 states and 181213 transitions. [2020-12-22 09:07:30,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-12-22 09:07:30,819 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:30,821 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:07:30,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 09:07:30,821 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:30,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:30,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1496989680, now seen corresponding path program 1 times [2020-12-22 09:07:30,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:30,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824441929] [2020-12-22 09:07:30,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:30,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:07:31,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824441929] [2020-12-22 09:07:31,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:31,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:07:31,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180817730] [2020-12-22 09:07:31,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:07:31,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:31,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:07:31,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:07:31,016 INFO L87 Difference]: Start difference. First operand 121518 states and 181213 transitions. Second operand 4 states. [2020-12-22 09:07:45,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:45,935 INFO L93 Difference]: Finished difference Result 264446 states and 399431 transitions. [2020-12-22 09:07:45,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:07:45,935 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 182 [2020-12-22 09:07:45,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:46,229 INFO L225 Difference]: With dead ends: 264446 [2020-12-22 09:07:46,229 INFO L226 Difference]: Without dead ends: 159436 [2020-12-22 09:07:46,338 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 09:07:46,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159436 states. [2020-12-22 09:07:58,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159436 to 125194. [2020-12-22 09:07:58,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125194 states. [2020-12-22 09:07:58,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125194 states to 125194 states and 184869 transitions. [2020-12-22 09:07:58,628 INFO L78 Accepts]: Start accepts. Automaton has 125194 states and 184869 transitions. Word has length 182 [2020-12-22 09:07:58,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:07:58,629 INFO L481 AbstractCegarLoop]: Abstraction has 125194 states and 184869 transitions. [2020-12-22 09:07:58,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:07:58,629 INFO L276 IsEmpty]: Start isEmpty. Operand 125194 states and 184869 transitions. [2020-12-22 09:07:58,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-12-22 09:07:58,652 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:07:58,652 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:07:58,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:07:58,653 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:07:58,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:07:58,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1965776013, now seen corresponding path program 1 times [2020-12-22 09:07:58,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:07:58,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503590095] [2020-12-22 09:07:58,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:07:58,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:07:59,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:07:59,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503590095] [2020-12-22 09:07:59,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:07:59,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:07:59,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724405638] [2020-12-22 09:07:59,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:07:59,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:07:59,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:07:59,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:07:59,077 INFO L87 Difference]: Start difference. First operand 125194 states and 184869 transitions. Second operand 5 states. [2020-12-22 09:08:20,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:20,506 INFO L93 Difference]: Finished difference Result 297582 states and 448477 transitions. [2020-12-22 09:08:20,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:08:20,507 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 182 [2020-12-22 09:08:20,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:21,136 INFO L225 Difference]: With dead ends: 297582 [2020-12-22 09:08:21,136 INFO L226 Difference]: Without dead ends: 228648 [2020-12-22 09:08:21,258 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 09:08:21,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228648 states. [2020-12-22 09:08:37,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228648 to 159642. [2020-12-22 09:08:37,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159642 states. [2020-12-22 09:08:38,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159642 states to 159642 states and 236993 transitions. [2020-12-22 09:08:38,054 INFO L78 Accepts]: Start accepts. Automaton has 159642 states and 236993 transitions. Word has length 182 [2020-12-22 09:08:38,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:38,055 INFO L481 AbstractCegarLoop]: Abstraction has 159642 states and 236993 transitions. [2020-12-22 09:08:38,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:08:38,055 INFO L276 IsEmpty]: Start isEmpty. Operand 159642 states and 236993 transitions. [2020-12-22 09:08:38,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-12-22 09:08:38,079 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:38,079 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:08:38,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 09:08:38,079 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:38,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:38,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1787657341, now seen corresponding path program 1 times [2020-12-22 09:08:38,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:38,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599792742] [2020-12-22 09:08:38,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:38,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:08:38,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599792742] [2020-12-22 09:08:38,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:38,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:08:38,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769191584] [2020-12-22 09:08:38,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:08:38,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:38,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:08:38,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:38,226 INFO L87 Difference]: Start difference. First operand 159642 states and 236993 transitions. Second operand 3 states.