/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_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:17:07,008 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:17:07,012 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:17:07,068 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:17:07,068 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:17:07,073 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:17:07,077 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:17:07,085 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:17:07,089 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:17:07,095 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:17:07,096 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:17:07,098 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:17:07,098 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:17:07,101 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:17:07,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:17:07,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:17:07,107 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:17:07,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:17:07,133 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:17:07,141 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:17:07,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:17:07,144 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:17:07,146 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:17:07,147 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:17:07,153 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:17:07,157 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:17:07,158 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:17:07,160 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:17:07,161 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:17:07,162 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:17:07,163 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:17:07,163 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:17:07,164 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:17:07,164 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:17:07,165 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:17:07,166 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:17:07,167 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:17:07,219 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:17:07,220 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:17:07,223 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:17:07,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:17:07,224 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:17:07,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:17:07,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:17:07,224 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:17:07,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:17:07,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:17:07,226 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:17:07,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:17:07,227 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:17:07,227 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:17:07,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:17:07,227 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:17:07,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:17:07,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:17:07,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:17:07,228 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:17:07,229 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:17:07,229 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:17:07,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:17:07,229 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:17:07,229 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:17:07,230 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:17:07,652 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:17:07,678 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:17:07,681 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:17:07,682 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:17:07,683 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:17:07,684 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:17:07,775 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ceecf6ec/bbb6bcfeb6b64bdca6f29e32e2932f69/FLAG87a6ac905 [2020-12-22 08:17:08,362 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:17:08,362 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:17:08,381 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ceecf6ec/bbb6bcfeb6b64bdca6f29e32e2932f69/FLAG87a6ac905 [2020-12-22 08:17:08,712 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ceecf6ec/bbb6bcfeb6b64bdca6f29e32e2932f69 [2020-12-22 08:17:08,716 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:17:08,719 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:17:08,726 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:17:08,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:17:08,731 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:17:08,732 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:17:08" (1/1) ... [2020-12-22 08:17:08,735 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c0e7f22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:08, skipping insertion in model container [2020-12-22 08:17:08,735 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:17:08" (1/1) ... [2020-12-22 08:17:08,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:17:08,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:17:09,000 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_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4007,4020] [2020-12-22 08:17:09,052 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:17:09,075 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:17:09,143 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_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4007,4020] [2020-12-22 08:17:09,171 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:17:09,201 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:17:09,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:09 WrapperNode [2020-12-22 08:17:09,202 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:17:09,204 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:17:09,204 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:17:09,204 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:17:09,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:09" (1/1) ... [2020-12-22 08:17:09,237 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:09" (1/1) ... [2020-12-22 08:17:09,267 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:17:09,268 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:17:09,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:17:09,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:17:09,282 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:09" (1/1) ... [2020-12-22 08:17:09,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:09" (1/1) ... [2020-12-22 08:17:09,285 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:09" (1/1) ... [2020-12-22 08:17:09,286 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:09" (1/1) ... [2020-12-22 08:17:09,292 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:09" (1/1) ... [2020-12-22 08:17:09,297 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:09" (1/1) ... [2020-12-22 08:17:09,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:09" (1/1) ... [2020-12-22 08:17:09,303 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:17:09,304 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:17:09,304 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:17:09,304 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:17:09,305 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:17:09,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:17:09,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:17:09,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:17:09,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:17:10,204 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:17:10,204 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:17:10,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:17:10 BoogieIcfgContainer [2020-12-22 08:17:10,209 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:17:10,211 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:17:10,211 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:17:10,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:17:10,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:17:08" (1/3) ... [2020-12-22 08:17:10,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b6d14f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:17:10, skipping insertion in model container [2020-12-22 08:17:10,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:09" (2/3) ... [2020-12-22 08:17:10,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b6d14f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:17:10, skipping insertion in model container [2020-12-22 08:17:10,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:17:10" (3/3) ... [2020-12-22 08:17:10,218 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:17:10,225 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:17:10,231 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:17:10,253 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:17:10,283 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:17:10,284 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:17:10,284 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:17:10,284 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:17:10,284 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:17:10,285 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:17:10,285 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:17:10,285 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:17:10,304 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states. [2020-12-22 08:17:10,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 08:17:10,313 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:10,314 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] [2020-12-22 08:17:10,314 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:10,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:10,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1356231251, now seen corresponding path program 1 times [2020-12-22 08:17:10,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:10,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710877361] [2020-12-22 08:17:10,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:10,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:10,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:17:10,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710877361] [2020-12-22 08:17:10,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:10,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:17:10,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400122367] [2020-12-22 08:17:10,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:17:10,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:10,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:17:10,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:10,695 INFO L87 Difference]: Start difference. First operand 82 states. Second operand 3 states. [2020-12-22 08:17:10,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:10,811 INFO L93 Difference]: Finished difference Result 190 states and 300 transitions. [2020-12-22 08:17:10,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:17:10,813 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-12-22 08:17:10,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:10,847 INFO L225 Difference]: With dead ends: 190 [2020-12-22 08:17:10,848 INFO L226 Difference]: Without dead ends: 122 [2020-12-22 08:17:10,853 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 08:17:10,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-22 08:17:10,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2020-12-22 08:17:10,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-22 08:17:10,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 178 transitions. [2020-12-22 08:17:10,928 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 178 transitions. Word has length 37 [2020-12-22 08:17:10,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:10,928 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 178 transitions. [2020-12-22 08:17:10,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:17:10,929 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 178 transitions. [2020-12-22 08:17:10,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 08:17:10,930 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:10,931 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] [2020-12-22 08:17:10,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:17:10,931 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:10,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:10,932 INFO L82 PathProgramCache]: Analyzing trace with hash -775084619, now seen corresponding path program 1 times [2020-12-22 08:17:10,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:10,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396330319] [2020-12-22 08:17:10,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:11,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:17:11,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396330319] [2020-12-22 08:17:11,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:11,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:17:11,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058611161] [2020-12-22 08:17:11,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:17:11,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:11,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:17:11,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:11,037 INFO L87 Difference]: Start difference. First operand 120 states and 178 transitions. Second operand 3 states. [2020-12-22 08:17:11,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:11,102 INFO L93 Difference]: Finished difference Result 288 states and 442 transitions. [2020-12-22 08:17:11,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:17:11,103 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-12-22 08:17:11,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:11,106 INFO L225 Difference]: With dead ends: 288 [2020-12-22 08:17:11,106 INFO L226 Difference]: Without dead ends: 188 [2020-12-22 08:17:11,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:11,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-22 08:17:11,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2020-12-22 08:17:11,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-22 08:17:11,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 281 transitions. [2020-12-22 08:17:11,153 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 281 transitions. Word has length 38 [2020-12-22 08:17:11,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:11,154 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 281 transitions. [2020-12-22 08:17:11,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:17:11,156 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 281 transitions. [2020-12-22 08:17:11,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 08:17:11,157 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:11,158 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] [2020-12-22 08:17:11,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:17:11,158 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:11,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:11,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1501816372, now seen corresponding path program 1 times [2020-12-22 08:17:11,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:11,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079058289] [2020-12-22 08:17:11,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:11,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:11,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:17:11,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079058289] [2020-12-22 08:17:11,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:11,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:17:11,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908333066] [2020-12-22 08:17:11,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:17:11,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:11,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:17:11,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:17:11,318 INFO L87 Difference]: Start difference. First operand 186 states and 281 transitions. Second operand 5 states. [2020-12-22 08:17:11,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:11,505 INFO L93 Difference]: Finished difference Result 628 states and 972 transitions. [2020-12-22 08:17:11,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:17:11,506 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-12-22 08:17:11,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:11,516 INFO L225 Difference]: With dead ends: 628 [2020-12-22 08:17:11,516 INFO L226 Difference]: Without dead ends: 462 [2020-12-22 08:17:11,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:17:11,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2020-12-22 08:17:11,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 458. [2020-12-22 08:17:11,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2020-12-22 08:17:11,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 705 transitions. [2020-12-22 08:17:11,611 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 705 transitions. Word has length 39 [2020-12-22 08:17:11,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:11,614 INFO L481 AbstractCegarLoop]: Abstraction has 458 states and 705 transitions. [2020-12-22 08:17:11,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:17:11,615 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 705 transitions. [2020-12-22 08:17:11,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 08:17:11,616 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:11,617 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] [2020-12-22 08:17:11,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:17:11,619 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:11,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:11,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1560757853, now seen corresponding path program 1 times [2020-12-22 08:17:11,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:11,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294833049] [2020-12-22 08:17:11,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:11,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:17:11,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294833049] [2020-12-22 08:17:11,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:11,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:17:11,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288506637] [2020-12-22 08:17:11,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:17:11,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:11,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:17:11,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:17:11,756 INFO L87 Difference]: Start difference. First operand 458 states and 705 transitions. Second operand 6 states. [2020-12-22 08:17:12,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:12,066 INFO L93 Difference]: Finished difference Result 1744 states and 2712 transitions. [2020-12-22 08:17:12,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:17:12,067 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-12-22 08:17:12,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:12,075 INFO L225 Difference]: With dead ends: 1744 [2020-12-22 08:17:12,075 INFO L226 Difference]: Without dead ends: 1306 [2020-12-22 08:17:12,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 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 08:17:12,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2020-12-22 08:17:12,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 1302. [2020-12-22 08:17:12,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1302 states. [2020-12-22 08:17:12,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 2017 transitions. [2020-12-22 08:17:12,199 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 2017 transitions. Word has length 41 [2020-12-22 08:17:12,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:12,200 INFO L481 AbstractCegarLoop]: Abstraction has 1302 states and 2017 transitions. [2020-12-22 08:17:12,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:17:12,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 2017 transitions. [2020-12-22 08:17:12,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 08:17:12,202 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:12,202 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] [2020-12-22 08:17:12,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:17:12,202 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:12,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:12,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1890309442, now seen corresponding path program 1 times [2020-12-22 08:17:12,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:12,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113017585] [2020-12-22 08:17:12,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:12,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:12,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:17:12,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113017585] [2020-12-22 08:17:12,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:12,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:17:12,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576249267] [2020-12-22 08:17:12,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:17:12,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:12,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:17:12,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:17:12,326 INFO L87 Difference]: Start difference. First operand 1302 states and 2017 transitions. Second operand 5 states. [2020-12-22 08:17:12,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:12,710 INFO L93 Difference]: Finished difference Result 5188 states and 8059 transitions. [2020-12-22 08:17:12,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:17:12,711 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-12-22 08:17:12,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:12,731 INFO L225 Difference]: With dead ends: 5188 [2020-12-22 08:17:12,731 INFO L226 Difference]: Without dead ends: 3906 [2020-12-22 08:17:12,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:17:12,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3906 states. [2020-12-22 08:17:12,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3906 to 2582. [2020-12-22 08:17:12,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2582 states. [2020-12-22 08:17:12,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2582 states to 2582 states and 3941 transitions. [2020-12-22 08:17:12,957 INFO L78 Accepts]: Start accepts. Automaton has 2582 states and 3941 transitions. Word has length 41 [2020-12-22 08:17:12,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:12,958 INFO L481 AbstractCegarLoop]: Abstraction has 2582 states and 3941 transitions. [2020-12-22 08:17:12,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:17:12,958 INFO L276 IsEmpty]: Start isEmpty. Operand 2582 states and 3941 transitions. [2020-12-22 08:17:12,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 08:17:12,959 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:12,960 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:17:12,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:17:12,960 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:12,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:12,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1549405756, now seen corresponding path program 1 times [2020-12-22 08:17:12,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:12,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121280118] [2020-12-22 08:17:12,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:12,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:13,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:17:13,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121280118] [2020-12-22 08:17:13,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:13,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:17:13,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971060060] [2020-12-22 08:17:13,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:17:13,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:13,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:17:13,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:17:13,047 INFO L87 Difference]: Start difference. First operand 2582 states and 3941 transitions. Second operand 5 states. [2020-12-22 08:17:13,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:13,573 INFO L93 Difference]: Finished difference Result 5288 states and 8006 transitions. [2020-12-22 08:17:13,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:17:13,574 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 08:17:13,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:13,601 INFO L225 Difference]: With dead ends: 5288 [2020-12-22 08:17:13,601 INFO L226 Difference]: Without dead ends: 5286 [2020-12-22 08:17:13,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:17:13,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5286 states. [2020-12-22 08:17:13,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5286 to 2726. [2020-12-22 08:17:13,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2726 states. [2020-12-22 08:17:13,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2726 states to 2726 states and 4085 transitions. [2020-12-22 08:17:13,925 INFO L78 Accepts]: Start accepts. Automaton has 2726 states and 4085 transitions. Word has length 42 [2020-12-22 08:17:13,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:13,927 INFO L481 AbstractCegarLoop]: Abstraction has 2726 states and 4085 transitions. [2020-12-22 08:17:13,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:17:13,927 INFO L276 IsEmpty]: Start isEmpty. Operand 2726 states and 4085 transitions. [2020-12-22 08:17:13,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 08:17:13,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:13,929 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:17:13,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:17:13,929 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:13,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:13,935 INFO L82 PathProgramCache]: Analyzing trace with hash -776365166, now seen corresponding path program 1 times [2020-12-22 08:17:13,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:13,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687152075] [2020-12-22 08:17:13,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:14,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:17:14,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687152075] [2020-12-22 08:17:14,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:14,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:17:14,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902994365] [2020-12-22 08:17:14,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:17:14,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:14,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:17:14,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:14,039 INFO L87 Difference]: Start difference. First operand 2726 states and 4085 transitions. Second operand 3 states. [2020-12-22 08:17:14,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:14,475 INFO L93 Difference]: Finished difference Result 7272 states and 10817 transitions. [2020-12-22 08:17:14,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:17:14,476 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 08:17:14,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:14,498 INFO L225 Difference]: With dead ends: 7272 [2020-12-22 08:17:14,498 INFO L226 Difference]: Without dead ends: 4566 [2020-12-22 08:17:14,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:14,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4566 states. [2020-12-22 08:17:14,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4566 to 4504. [2020-12-22 08:17:14,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4504 states. [2020-12-22 08:17:14,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4504 states to 4504 states and 6571 transitions. [2020-12-22 08:17:14,977 INFO L78 Accepts]: Start accepts. Automaton has 4504 states and 6571 transitions. Word has length 43 [2020-12-22 08:17:14,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:14,977 INFO L481 AbstractCegarLoop]: Abstraction has 4504 states and 6571 transitions. [2020-12-22 08:17:14,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:17:14,977 INFO L276 IsEmpty]: Start isEmpty. Operand 4504 states and 6571 transitions. [2020-12-22 08:17:14,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 08:17:14,979 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:14,979 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] [2020-12-22 08:17:14,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:17:14,979 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:14,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:14,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1884301642, now seen corresponding path program 1 times [2020-12-22 08:17:14,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:14,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239908343] [2020-12-22 08:17:14,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:15,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:15,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:17:15,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239908343] [2020-12-22 08:17:15,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:15,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:17:15,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098588479] [2020-12-22 08:17:15,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:17:15,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:15,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:17:15,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:15,068 INFO L87 Difference]: Start difference. First operand 4504 states and 6571 transitions. Second operand 3 states. [2020-12-22 08:17:15,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:15,665 INFO L93 Difference]: Finished difference Result 8983 states and 13193 transitions. [2020-12-22 08:17:15,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:17:15,666 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 08:17:15,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:15,699 INFO L225 Difference]: With dead ends: 8983 [2020-12-22 08:17:15,699 INFO L226 Difference]: Without dead ends: 6276 [2020-12-22 08:17:15,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:15,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6276 states. [2020-12-22 08:17:16,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6276 to 6274. [2020-12-22 08:17:16,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6274 states. [2020-12-22 08:17:16,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6274 states to 6274 states and 9053 transitions. [2020-12-22 08:17:16,376 INFO L78 Accepts]: Start accepts. Automaton has 6274 states and 9053 transitions. Word has length 43 [2020-12-22 08:17:16,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:16,377 INFO L481 AbstractCegarLoop]: Abstraction has 6274 states and 9053 transitions. [2020-12-22 08:17:16,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:17:16,377 INFO L276 IsEmpty]: Start isEmpty. Operand 6274 states and 9053 transitions. [2020-12-22 08:17:16,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 08:17:16,380 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:16,380 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:17:16,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:17:16,381 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:16,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:16,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1507478329, now seen corresponding path program 1 times [2020-12-22 08:17:16,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:16,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359913942] [2020-12-22 08:17:16,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:16,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:16,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 08:17:16,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359913942] [2020-12-22 08:17:16,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:16,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:17:16,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509106249] [2020-12-22 08:17:16,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:17:16,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:16,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:17:16,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:17:16,521 INFO L87 Difference]: Start difference. First operand 6274 states and 9053 transitions. Second operand 5 states. [2020-12-22 08:17:17,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:17,292 INFO L93 Difference]: Finished difference Result 11208 states and 16319 transitions. [2020-12-22 08:17:17,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:17:17,293 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2020-12-22 08:17:17,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:17,334 INFO L225 Difference]: With dead ends: 11208 [2020-12-22 08:17:17,335 INFO L226 Difference]: Without dead ends: 8932 [2020-12-22 08:17:17,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:17:17,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8932 states. [2020-12-22 08:17:18,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8932 to 8138. [2020-12-22 08:17:18,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8138 states. [2020-12-22 08:17:18,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8138 states to 8138 states and 11733 transitions. [2020-12-22 08:17:18,254 INFO L78 Accepts]: Start accepts. Automaton has 8138 states and 11733 transitions. Word has length 61 [2020-12-22 08:17:18,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:18,255 INFO L481 AbstractCegarLoop]: Abstraction has 8138 states and 11733 transitions. [2020-12-22 08:17:18,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:17:18,255 INFO L276 IsEmpty]: Start isEmpty. Operand 8138 states and 11733 transitions. [2020-12-22 08:17:18,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 08:17:18,257 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:18,258 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:17:18,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:17:18,258 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:18,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:18,259 INFO L82 PathProgramCache]: Analyzing trace with hash 910806190, now seen corresponding path program 1 times [2020-12-22 08:17:18,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:18,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296459013] [2020-12-22 08:17:18,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:18,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:18,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:17:18,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296459013] [2020-12-22 08:17:18,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:18,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:17:18,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247114102] [2020-12-22 08:17:18,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:17:18,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:18,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:17:18,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:18,326 INFO L87 Difference]: Start difference. First operand 8138 states and 11733 transitions. Second operand 3 states. [2020-12-22 08:17:18,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:18,980 INFO L93 Difference]: Finished difference Result 12968 states and 18595 transitions. [2020-12-22 08:17:18,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:17:18,981 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-12-22 08:17:18,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:18,998 INFO L225 Difference]: With dead ends: 12968 [2020-12-22 08:17:18,999 INFO L226 Difference]: Without dead ends: 8494 [2020-12-22 08:17:19,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:19,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8494 states. [2020-12-22 08:17:19,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8494 to 7236. [2020-12-22 08:17:19,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7236 states. [2020-12-22 08:17:19,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7236 states to 7236 states and 10240 transitions. [2020-12-22 08:17:19,622 INFO L78 Accepts]: Start accepts. Automaton has 7236 states and 10240 transitions. Word has length 61 [2020-12-22 08:17:19,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:19,623 INFO L481 AbstractCegarLoop]: Abstraction has 7236 states and 10240 transitions. [2020-12-22 08:17:19,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:17:19,623 INFO L276 IsEmpty]: Start isEmpty. Operand 7236 states and 10240 transitions. [2020-12-22 08:17:19,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 08:17:19,626 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:19,626 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:17:19,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:17:19,626 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:19,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:19,627 INFO L82 PathProgramCache]: Analyzing trace with hash -632426569, now seen corresponding path program 1 times [2020-12-22 08:17:19,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:19,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634185509] [2020-12-22 08:17:19,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:19,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:19,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 08:17:19,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634185509] [2020-12-22 08:17:19,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:19,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:17:19,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918993535] [2020-12-22 08:17:19,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:17:19,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:19,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:17:19,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:17:19,703 INFO L87 Difference]: Start difference. First operand 7236 states and 10240 transitions. Second operand 6 states. [2020-12-22 08:17:21,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:21,296 INFO L93 Difference]: Finished difference Result 24944 states and 35190 transitions. [2020-12-22 08:17:21,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:17:21,297 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-12-22 08:17:21,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:21,335 INFO L225 Difference]: With dead ends: 24944 [2020-12-22 08:17:21,335 INFO L226 Difference]: Without dead ends: 17760 [2020-12-22 08:17:21,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 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 08:17:21,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17760 states. [2020-12-22 08:17:22,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17760 to 17564. [2020-12-22 08:17:22,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17564 states. [2020-12-22 08:17:22,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17564 states to 17564 states and 24684 transitions. [2020-12-22 08:17:22,754 INFO L78 Accepts]: Start accepts. Automaton has 17564 states and 24684 transitions. Word has length 61 [2020-12-22 08:17:22,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:22,754 INFO L481 AbstractCegarLoop]: Abstraction has 17564 states and 24684 transitions. [2020-12-22 08:17:22,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:17:22,754 INFO L276 IsEmpty]: Start isEmpty. Operand 17564 states and 24684 transitions. [2020-12-22 08:17:22,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 08:17:22,758 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:22,758 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:17:22,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:17:22,758 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:22,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:22,759 INFO L82 PathProgramCache]: Analyzing trace with hash 985078322, now seen corresponding path program 1 times [2020-12-22 08:17:22,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:22,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062946117] [2020-12-22 08:17:22,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:22,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:22,833 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 08:17:22,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062946117] [2020-12-22 08:17:22,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:22,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:17:22,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138374423] [2020-12-22 08:17:22,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:17:22,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:22,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:17:22,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:17:22,836 INFO L87 Difference]: Start difference. First operand 17564 states and 24684 transitions. Second operand 5 states. [2020-12-22 08:17:24,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:24,132 INFO L93 Difference]: Finished difference Result 25214 states and 35779 transitions. [2020-12-22 08:17:24,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:17:24,133 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2020-12-22 08:17:24,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:24,174 INFO L225 Difference]: With dead ends: 25214 [2020-12-22 08:17:24,174 INFO L226 Difference]: Without dead ends: 22878 [2020-12-22 08:17:24,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:17:24,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22878 states. [2020-12-22 08:17:26,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22878 to 19850. [2020-12-22 08:17:26,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19850 states. [2020-12-22 08:17:26,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19850 states to 19850 states and 27918 transitions. [2020-12-22 08:17:26,090 INFO L78 Accepts]: Start accepts. Automaton has 19850 states and 27918 transitions. Word has length 61 [2020-12-22 08:17:26,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:26,091 INFO L481 AbstractCegarLoop]: Abstraction has 19850 states and 27918 transitions. [2020-12-22 08:17:26,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:17:26,091 INFO L276 IsEmpty]: Start isEmpty. Operand 19850 states and 27918 transitions. [2020-12-22 08:17:26,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:17:26,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:26,097 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:17:26,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:17:26,097 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:26,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:26,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1466148538, now seen corresponding path program 1 times [2020-12-22 08:17:26,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:26,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105958651] [2020-12-22 08:17:26,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:26,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:26,335 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:17:26,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105958651] [2020-12-22 08:17:26,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828079800] [2020-12-22 08:17:26,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 08:17:26,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:26,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 08:17:26,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:17:26,746 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 08:17:26,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:17:26,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 08:17:26,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093353333] [2020-12-22 08:17:26,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 08:17:26,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:26,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 08:17:26,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-12-22 08:17:26,749 INFO L87 Difference]: Start difference. First operand 19850 states and 27918 transitions. Second operand 12 states. [2020-12-22 08:17:47,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:47,253 INFO L93 Difference]: Finished difference Result 161949 states and 225996 transitions. [2020-12-22 08:17:47,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2020-12-22 08:17:47,254 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2020-12-22 08:17:47,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:47,851 INFO L225 Difference]: With dead ends: 161949 [2020-12-22 08:17:47,851 INFO L226 Difference]: Without dead ends: 142944 [2020-12-22 08:17:47,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7060 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2503, Invalid=13753, Unknown=0, NotChecked=0, Total=16256 [2020-12-22 08:17:48,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142944 states. [2020-12-22 08:17:54,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142944 to 55615. [2020-12-22 08:17:54,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55615 states. [2020-12-22 08:17:54,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55615 states to 55615 states and 76707 transitions. [2020-12-22 08:17:54,833 INFO L78 Accepts]: Start accepts. Automaton has 55615 states and 76707 transitions. Word has length 62 [2020-12-22 08:17:54,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:54,833 INFO L481 AbstractCegarLoop]: Abstraction has 55615 states and 76707 transitions. [2020-12-22 08:17:54,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 08:17:54,833 INFO L276 IsEmpty]: Start isEmpty. Operand 55615 states and 76707 transitions. [2020-12-22 08:17:54,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:17:54,838 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:54,838 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:17:55,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 08:17:55,052 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:55,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:55,053 INFO L82 PathProgramCache]: Analyzing trace with hash 885685064, now seen corresponding path program 1 times [2020-12-22 08:17:55,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:55,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742805458] [2020-12-22 08:17:55,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:55,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:55,112 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:17:55,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742805458] [2020-12-22 08:17:55,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:55,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:17:55,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618291264] [2020-12-22 08:17:55,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:17:55,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:55,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:17:55,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:55,115 INFO L87 Difference]: Start difference. First operand 55615 states and 76707 transitions. Second operand 3 states. [2020-12-22 08:18:03,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:18:03,623 INFO L93 Difference]: Finished difference Result 138231 states and 189747 transitions. [2020-12-22 08:18:03,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:18:03,624 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 08:18:03,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:18:03,790 INFO L225 Difference]: With dead ends: 138231 [2020-12-22 08:18:03,790 INFO L226 Difference]: Without dead ends: 94277 [2020-12-22 08:18:03,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:18:04,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94277 states. [2020-12-22 08:18:12,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94277 to 94226. [2020-12-22 08:18:12,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94226 states. [2020-12-22 08:18:12,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94226 states to 94226 states and 127682 transitions. [2020-12-22 08:18:12,788 INFO L78 Accepts]: Start accepts. Automaton has 94226 states and 127682 transitions. Word has length 63 [2020-12-22 08:18:12,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:18:12,788 INFO L481 AbstractCegarLoop]: Abstraction has 94226 states and 127682 transitions. [2020-12-22 08:18:12,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:18:12,788 INFO L276 IsEmpty]: Start isEmpty. Operand 94226 states and 127682 transitions. [2020-12-22 08:18:12,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:18:12,795 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:18:12,795 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:18:12,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:18:12,795 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:18:12,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:18:12,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1327129075, now seen corresponding path program 1 times [2020-12-22 08:18:12,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:18:12,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022008606] [2020-12-22 08:18:12,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:18:12,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:18:12,846 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 08:18:12,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022008606] [2020-12-22 08:18:12,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:18:12,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:18:12,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350259990] [2020-12-22 08:18:12,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:18:12,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:18:12,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:18:12,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:18:12,849 INFO L87 Difference]: Start difference. First operand 94226 states and 127682 transitions. Second operand 5 states. [2020-12-22 08:18:25,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:18:25,101 INFO L93 Difference]: Finished difference Result 218547 states and 295321 transitions. [2020-12-22 08:18:25,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:18:25,102 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 08:18:25,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:18:25,405 INFO L225 Difference]: With dead ends: 218547 [2020-12-22 08:18:25,405 INFO L226 Difference]: Without dead ends: 124363 [2020-12-22 08:18:25,489 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 08:18:25,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124363 states. [2020-12-22 08:18:34,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124363 to 94226. [2020-12-22 08:18:34,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94226 states. [2020-12-22 08:18:35,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94226 states to 94226 states and 126625 transitions. [2020-12-22 08:18:35,046 INFO L78 Accepts]: Start accepts. Automaton has 94226 states and 126625 transitions. Word has length 64 [2020-12-22 08:18:35,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:18:35,046 INFO L481 AbstractCegarLoop]: Abstraction has 94226 states and 126625 transitions. [2020-12-22 08:18:35,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:18:35,046 INFO L276 IsEmpty]: Start isEmpty. Operand 94226 states and 126625 transitions. [2020-12-22 08:18:35,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:18:35,052 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:18:35,052 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:18:35,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:18:35,052 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:18:35,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:18:35,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1913170926, now seen corresponding path program 1 times [2020-12-22 08:18:35,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:18:35,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794196374] [2020-12-22 08:18:35,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:18:35,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:18:35,134 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 08:18:35,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794196374] [2020-12-22 08:18:35,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:18:35,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:18:35,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250003915] [2020-12-22 08:18:35,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:18:35,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:18:35,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:18:35,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:18:35,136 INFO L87 Difference]: Start difference. First operand 94226 states and 126625 transitions. Second operand 5 states. [2020-12-22 08:18:46,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:18:46,428 INFO L93 Difference]: Finished difference Result 139990 states and 190048 transitions. [2020-12-22 08:18:46,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:18:46,428 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 08:18:46,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:18:46,737 INFO L225 Difference]: With dead ends: 139990 [2020-12-22 08:18:46,737 INFO L226 Difference]: Without dead ends: 120199 [2020-12-22 08:18:46,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:18:46,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120199 states. [2020-12-22 08:18:57,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120199 to 110824. [2020-12-22 08:18:57,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110824 states. [2020-12-22 08:18:57,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110824 states to 110824 states and 148659 transitions. [2020-12-22 08:18:57,940 INFO L78 Accepts]: Start accepts. Automaton has 110824 states and 148659 transitions. Word has length 64 [2020-12-22 08:18:57,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:18:57,940 INFO L481 AbstractCegarLoop]: Abstraction has 110824 states and 148659 transitions. [2020-12-22 08:18:57,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:18:57,941 INFO L276 IsEmpty]: Start isEmpty. Operand 110824 states and 148659 transitions. [2020-12-22 08:18:57,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:18:57,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:18:57,946 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:18:57,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:18:57,947 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:18:57,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:18:57,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1760409357, now seen corresponding path program 1 times [2020-12-22 08:18:57,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:18:57,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050353429] [2020-12-22 08:18:57,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:18:57,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:18:57,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:18:57,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050353429] [2020-12-22 08:18:57,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:18:57,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:18:57,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549808587] [2020-12-22 08:18:57,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:18:57,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:18:57,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:18:57,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:18:57,990 INFO L87 Difference]: Start difference. First operand 110824 states and 148659 transitions. Second operand 3 states. [2020-12-22 08:19:11,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:11,581 INFO L93 Difference]: Finished difference Result 231082 states and 308960 transitions. [2020-12-22 08:19:11,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:19:11,581 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 08:19:11,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:11,781 INFO L225 Difference]: With dead ends: 231082 [2020-12-22 08:19:11,781 INFO L226 Difference]: Without dead ends: 130012 [2020-12-22 08:19:11,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:19:11,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130012 states. [2020-12-22 08:19:23,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130012 to 112653. [2020-12-22 08:19:23,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112653 states. [2020-12-22 08:19:24,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112653 states to 112653 states and 149049 transitions. [2020-12-22 08:19:24,117 INFO L78 Accepts]: Start accepts. Automaton has 112653 states and 149049 transitions. Word has length 64 [2020-12-22 08:19:24,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:24,118 INFO L481 AbstractCegarLoop]: Abstraction has 112653 states and 149049 transitions. [2020-12-22 08:19:24,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:19:24,118 INFO L276 IsEmpty]: Start isEmpty. Operand 112653 states and 149049 transitions. [2020-12-22 08:19:24,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 08:19:24,138 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:24,138 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:19:24,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:19:24,139 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:24,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:24,139 INFO L82 PathProgramCache]: Analyzing trace with hash 138921381, now seen corresponding path program 1 times [2020-12-22 08:19:24,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:24,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818802672] [2020-12-22 08:19:24,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:24,219 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:19:24,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818802672] [2020-12-22 08:19:24,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439972088] [2020-12-22 08:19:24,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 08:19:24,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:24,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 08:19:24,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:19:24,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:19:24,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:19:24,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-22 08:19:24,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195614868] [2020-12-22 08:19:24,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 08:19:24,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:24,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 08:19:24,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-22 08:19:24,530 INFO L87 Difference]: Start difference. First operand 112653 states and 149049 transitions. Second operand 11 states.