/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/pals_floodmax.4.1.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:21:13,116 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:21:13,120 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:21:13,168 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:21:13,168 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:21:13,170 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:21:13,172 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:21:13,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:21:13,176 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:21:13,178 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:21:13,179 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:21:13,180 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:21:13,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:21:13,182 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:21:13,183 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:21:13,185 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:21:13,186 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:21:13,201 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:21:13,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:21:13,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:21:13,212 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:21:13,214 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:21:13,215 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:21:13,216 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:21:13,220 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 07:21:13,220 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 07:21:13,220 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 07:21:13,221 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 07:21:13,222 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 07:21:13,223 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 07:21:13,224 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:21:13,225 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:21:13,225 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:21:13,227 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:21:13,228 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:21:13,228 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:21:13,229 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:21:13,229 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:21:13,229 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:21:13,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:21:13,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:21:13,232 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:21:13,258 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:21:13,259 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:21:13,260 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:21:13,260 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:21:13,261 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:21:13,261 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:21:13,261 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:21:13,261 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:21:13,262 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:21:13,262 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:21:13,262 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:21:13,262 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:21:13,262 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:21:13,263 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:21:13,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:21:13,263 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:21:13,263 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:21:13,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:21:13,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:21:13,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:21:13,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:21:13,264 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:21:13,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:21:13,265 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:21:13,265 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:21:13,265 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:21:13,618 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:21:13,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:21:13,654 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:21:13,655 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:21:13,656 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:21:13,657 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.1.ufo.UNBOUNDED.pals.c [2020-12-22 07:21:13,758 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/017d3df20/854ae34371fa4be197e08243e67ea444/FLAG47acdc533 [2020-12-22 07:21:14,540 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:21:14,540 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.1.ufo.UNBOUNDED.pals.c [2020-12-22 07:21:14,556 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/017d3df20/854ae34371fa4be197e08243e67ea444/FLAG47acdc533 [2020-12-22 07:21:14,771 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/017d3df20/854ae34371fa4be197e08243e67ea444 [2020-12-22 07:21:14,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:21:14,776 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:21:14,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:21:14,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:21:14,782 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:21:14,783 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:21:14" (1/1) ... [2020-12-22 07:21:14,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@365e90ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:14, skipping insertion in model container [2020-12-22 07:21:14,784 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:21:14" (1/1) ... [2020-12-22 07:21:14,792 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:21:14,839 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:21:15,144 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/pals_floodmax.4.1.ufo.UNBOUNDED.pals.c[24372,24385] [2020-12-22 07:21:15,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:21:15,162 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:21:15,333 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/pals_floodmax.4.1.ufo.UNBOUNDED.pals.c[24372,24385] [2020-12-22 07:21:15,334 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:21:15,355 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:21:15,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:15 WrapperNode [2020-12-22 07:21:15,356 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:21:15,358 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:21:15,358 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:21:15,358 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:21:15,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:15" (1/1) ... [2020-12-22 07:21:15,384 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:15" (1/1) ... [2020-12-22 07:21:15,476 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:21:15,477 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:21:15,477 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:21:15,477 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:21:15,488 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:15" (1/1) ... [2020-12-22 07:21:15,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:15" (1/1) ... [2020-12-22 07:21:15,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:15" (1/1) ... [2020-12-22 07:21:15,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:15" (1/1) ... [2020-12-22 07:21:15,512 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:15" (1/1) ... [2020-12-22 07:21:15,528 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:15" (1/1) ... [2020-12-22 07:21:15,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:15" (1/1) ... [2020-12-22 07:21:15,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:21:15,543 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:21:15,544 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:21:15,544 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:21:15,545 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:15" (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 07:21:15,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:21:15,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:21:15,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:21:15,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:21:17,137 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:21:17,138 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-22 07:21:17,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:21:17 BoogieIcfgContainer [2020-12-22 07:21:17,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:21:17,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:21:17,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:21:17,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:21:17,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:21:14" (1/3) ... [2020-12-22 07:21:17,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fdd4026 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:21:17, skipping insertion in model container [2020-12-22 07:21:17,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:15" (2/3) ... [2020-12-22 07:21:17,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fdd4026 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:21:17, skipping insertion in model container [2020-12-22 07:21:17,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:21:17" (3/3) ... [2020-12-22 07:21:17,160 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.1.ufo.UNBOUNDED.pals.c [2020-12-22 07:21:17,169 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:21:17,175 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:21:17,197 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:21:17,231 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:21:17,231 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:21:17,231 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:21:17,231 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:21:17,231 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:21:17,232 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:21:17,232 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:21:17,232 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:21:17,256 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states. [2020-12-22 07:21:17,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:21:17,272 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:17,273 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:17,274 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:17,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:17,280 INFO L82 PathProgramCache]: Analyzing trace with hash -223378612, now seen corresponding path program 1 times [2020-12-22 07:21:17,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:17,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619828943] [2020-12-22 07:21:17,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:17,767 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 07:21:17,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619828943] [2020-12-22 07:21:17,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:17,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:21:17,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291395154] [2020-12-22 07:21:17,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:21:17,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:17,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:21:17,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:21:17,791 INFO L87 Difference]: Start difference. First operand 299 states. Second operand 2 states. [2020-12-22 07:21:17,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:17,839 INFO L93 Difference]: Finished difference Result 415 states and 733 transitions. [2020-12-22 07:21:17,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:21:17,841 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 77 [2020-12-22 07:21:17,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:17,859 INFO L225 Difference]: With dead ends: 415 [2020-12-22 07:21:17,860 INFO L226 Difference]: Without dead ends: 295 [2020-12-22 07:21:17,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:21:17,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-12-22 07:21:17,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2020-12-22 07:21:17,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-12-22 07:21:17,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 526 transitions. [2020-12-22 07:21:17,950 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 526 transitions. Word has length 77 [2020-12-22 07:21:17,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:17,951 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 526 transitions. [2020-12-22 07:21:17,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:21:17,951 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 526 transitions. [2020-12-22 07:21:17,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:21:17,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:17,956 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:17,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:21:17,957 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:17,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:17,958 INFO L82 PathProgramCache]: Analyzing trace with hash -357392118, now seen corresponding path program 1 times [2020-12-22 07:21:17,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:17,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852853162] [2020-12-22 07:21:17,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:18,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:18,268 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 07:21:18,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852853162] [2020-12-22 07:21:18,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:18,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:21:18,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637982641] [2020-12-22 07:21:18,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:21:18,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:18,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:21:18,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:21:18,278 INFO L87 Difference]: Start difference. First operand 295 states and 526 transitions. Second operand 5 states. [2020-12-22 07:21:18,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:18,421 INFO L93 Difference]: Finished difference Result 414 states and 726 transitions. [2020-12-22 07:21:18,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:21:18,422 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-12-22 07:21:18,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:18,426 INFO L225 Difference]: With dead ends: 414 [2020-12-22 07:21:18,427 INFO L226 Difference]: Without dead ends: 295 [2020-12-22 07:21:18,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:21:18,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-12-22 07:21:18,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2020-12-22 07:21:18,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-12-22 07:21:18,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 496 transitions. [2020-12-22 07:21:18,460 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 496 transitions. Word has length 77 [2020-12-22 07:21:18,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:18,460 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 496 transitions. [2020-12-22 07:21:18,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:21:18,461 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 496 transitions. [2020-12-22 07:21:18,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 07:21:18,470 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:18,470 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:18,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:21:18,471 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:18,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:18,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1317126024, now seen corresponding path program 1 times [2020-12-22 07:21:18,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:18,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497173202] [2020-12-22 07:21:18,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:18,752 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 07:21:18,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497173202] [2020-12-22 07:21:18,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:18,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:18,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254752072] [2020-12-22 07:21:18,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:18,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:18,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:18,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:18,756 INFO L87 Difference]: Start difference. First operand 295 states and 496 transitions. Second operand 3 states. [2020-12-22 07:21:18,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:18,813 INFO L93 Difference]: Finished difference Result 514 states and 867 transitions. [2020-12-22 07:21:18,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:18,814 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 07:21:18,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:18,818 INFO L225 Difference]: With dead ends: 514 [2020-12-22 07:21:18,818 INFO L226 Difference]: Without dead ends: 399 [2020-12-22 07:21:18,819 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 07:21:18,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2020-12-22 07:21:18,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 396. [2020-12-22 07:21:18,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2020-12-22 07:21:18,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 663 transitions. [2020-12-22 07:21:18,838 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 663 transitions. Word has length 106 [2020-12-22 07:21:18,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:18,839 INFO L481 AbstractCegarLoop]: Abstraction has 396 states and 663 transitions. [2020-12-22 07:21:18,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:18,839 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 663 transitions. [2020-12-22 07:21:18,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 07:21:18,845 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:18,846 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:18,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:21:18,846 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:18,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:18,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1632675295, now seen corresponding path program 1 times [2020-12-22 07:21:18,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:18,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974634163] [2020-12-22 07:21:18,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:18,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:19,031 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 07:21:19,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974634163] [2020-12-22 07:21:19,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:19,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:19,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578793851] [2020-12-22 07:21:19,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:19,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:19,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:19,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:19,038 INFO L87 Difference]: Start difference. First operand 396 states and 663 transitions. Second operand 3 states. [2020-12-22 07:21:19,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:19,086 INFO L93 Difference]: Finished difference Result 810 states and 1355 transitions. [2020-12-22 07:21:19,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:19,087 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 109 [2020-12-22 07:21:19,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:19,093 INFO L225 Difference]: With dead ends: 810 [2020-12-22 07:21:19,093 INFO L226 Difference]: Without dead ends: 594 [2020-12-22 07:21:19,096 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 07:21:19,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2020-12-22 07:21:19,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 590. [2020-12-22 07:21:19,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2020-12-22 07:21:19,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 985 transitions. [2020-12-22 07:21:19,134 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 985 transitions. Word has length 109 [2020-12-22 07:21:19,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:19,136 INFO L481 AbstractCegarLoop]: Abstraction has 590 states and 985 transitions. [2020-12-22 07:21:19,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:19,136 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 985 transitions. [2020-12-22 07:21:19,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 07:21:19,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:19,145 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:19,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:21:19,145 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:19,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:19,146 INFO L82 PathProgramCache]: Analyzing trace with hash 478871864, now seen corresponding path program 1 times [2020-12-22 07:21:19,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:19,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961967349] [2020-12-22 07:21:19,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:19,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:19,313 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 07:21:19,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961967349] [2020-12-22 07:21:19,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:19,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:19,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499571428] [2020-12-22 07:21:19,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:19,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:19,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:19,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:19,319 INFO L87 Difference]: Start difference. First operand 590 states and 985 transitions. Second operand 3 states. [2020-12-22 07:21:19,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:19,388 INFO L93 Difference]: Finished difference Result 1374 states and 2287 transitions. [2020-12-22 07:21:19,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:19,388 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2020-12-22 07:21:19,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:19,395 INFO L225 Difference]: With dead ends: 1374 [2020-12-22 07:21:19,395 INFO L226 Difference]: Without dead ends: 964 [2020-12-22 07:21:19,397 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 07:21:19,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2020-12-22 07:21:19,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 958. [2020-12-22 07:21:19,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 958 states. [2020-12-22 07:21:19,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 1589 transitions. [2020-12-22 07:21:19,444 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 1589 transitions. Word has length 112 [2020-12-22 07:21:19,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:19,445 INFO L481 AbstractCegarLoop]: Abstraction has 958 states and 1589 transitions. [2020-12-22 07:21:19,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:19,445 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 1589 transitions. [2020-12-22 07:21:19,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 07:21:19,448 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:19,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:19,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:21:19,448 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:19,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:19,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1034962865, now seen corresponding path program 1 times [2020-12-22 07:21:19,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:19,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428747341] [2020-12-22 07:21:19,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:19,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:19,585 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 07:21:19,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428747341] [2020-12-22 07:21:19,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:19,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:19,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746099616] [2020-12-22 07:21:19,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:19,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:19,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:19,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:19,590 INFO L87 Difference]: Start difference. First operand 958 states and 1589 transitions. Second operand 3 states. [2020-12-22 07:21:19,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:19,658 INFO L93 Difference]: Finished difference Result 2442 states and 4031 transitions. [2020-12-22 07:21:19,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:19,659 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 115 [2020-12-22 07:21:19,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:19,670 INFO L225 Difference]: With dead ends: 2442 [2020-12-22 07:21:19,670 INFO L226 Difference]: Without dead ends: 1664 [2020-12-22 07:21:19,672 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 07:21:19,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2020-12-22 07:21:19,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1654. [2020-12-22 07:21:19,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1654 states. [2020-12-22 07:21:19,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 2717 transitions. [2020-12-22 07:21:19,726 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 2717 transitions. Word has length 115 [2020-12-22 07:21:19,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:19,727 INFO L481 AbstractCegarLoop]: Abstraction has 1654 states and 2717 transitions. [2020-12-22 07:21:19,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:19,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 2717 transitions. [2020-12-22 07:21:19,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-22 07:21:19,729 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:19,730 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:19,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:21:19,730 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:19,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:19,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1214749416, now seen corresponding path program 1 times [2020-12-22 07:21:19,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:19,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922630314] [2020-12-22 07:21:19,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:19,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:19,910 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 07:21:19,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922630314] [2020-12-22 07:21:19,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:19,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:21:19,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541619255] [2020-12-22 07:21:19,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:21:19,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:19,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:21:19,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:21:19,914 INFO L87 Difference]: Start difference. First operand 1654 states and 2717 transitions. Second operand 6 states. [2020-12-22 07:21:20,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:20,274 INFO L93 Difference]: Finished difference Result 8542 states and 14161 transitions. [2020-12-22 07:21:20,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 07:21:20,274 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 118 [2020-12-22 07:21:20,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:20,312 INFO L225 Difference]: With dead ends: 8542 [2020-12-22 07:21:20,312 INFO L226 Difference]: Without dead ends: 7068 [2020-12-22 07:21:20,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:21:20,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7068 states. [2020-12-22 07:21:20,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7068 to 3027. [2020-12-22 07:21:20,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3027 states. [2020-12-22 07:21:20,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3027 states to 3027 states and 4967 transitions. [2020-12-22 07:21:20,516 INFO L78 Accepts]: Start accepts. Automaton has 3027 states and 4967 transitions. Word has length 118 [2020-12-22 07:21:20,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:20,516 INFO L481 AbstractCegarLoop]: Abstraction has 3027 states and 4967 transitions. [2020-12-22 07:21:20,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:21:20,518 INFO L276 IsEmpty]: Start isEmpty. Operand 3027 states and 4967 transitions. [2020-12-22 07:21:20,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-22 07:21:20,521 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:20,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:20,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:21:20,522 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:20,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:20,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1202886819, now seen corresponding path program 1 times [2020-12-22 07:21:20,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:20,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043468378] [2020-12-22 07:21:20,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:20,691 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 07:21:20,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043468378] [2020-12-22 07:21:20,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:20,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:21:20,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214111723] [2020-12-22 07:21:20,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:21:20,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:20,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:21:20,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:21:20,695 INFO L87 Difference]: Start difference. First operand 3027 states and 4967 transitions. Second operand 4 states. [2020-12-22 07:21:20,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:20,965 INFO L93 Difference]: Finished difference Result 8931 states and 14749 transitions. [2020-12-22 07:21:20,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:21:20,965 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 119 [2020-12-22 07:21:20,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:21,008 INFO L225 Difference]: With dead ends: 8931 [2020-12-22 07:21:21,008 INFO L226 Difference]: Without dead ends: 6084 [2020-12-22 07:21:21,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:21:21,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6084 states. [2020-12-22 07:21:21,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6084 to 4497. [2020-12-22 07:21:21,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4497 states. [2020-12-22 07:21:21,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4497 states to 4497 states and 7396 transitions. [2020-12-22 07:21:21,366 INFO L78 Accepts]: Start accepts. Automaton has 4497 states and 7396 transitions. Word has length 119 [2020-12-22 07:21:21,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:21,367 INFO L481 AbstractCegarLoop]: Abstraction has 4497 states and 7396 transitions. [2020-12-22 07:21:21,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:21:21,367 INFO L276 IsEmpty]: Start isEmpty. Operand 4497 states and 7396 transitions. [2020-12-22 07:21:21,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-22 07:21:21,371 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:21,371 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:21,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:21:21,371 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:21,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:21,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1004150655, now seen corresponding path program 1 times [2020-12-22 07:21:21,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:21,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122168794] [2020-12-22 07:21:21,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:21,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:21,506 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 07:21:21,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122168794] [2020-12-22 07:21:21,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:21,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:21:21,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392805077] [2020-12-22 07:21:21,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:21:21,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:21,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:21:21,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:21:21,515 INFO L87 Difference]: Start difference. First operand 4497 states and 7396 transitions. Second operand 4 states. [2020-12-22 07:21:21,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:21,819 INFO L93 Difference]: Finished difference Result 13184 states and 21756 transitions. [2020-12-22 07:21:21,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:21:21,820 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2020-12-22 07:21:21,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:21,880 INFO L225 Difference]: With dead ends: 13184 [2020-12-22 07:21:21,880 INFO L226 Difference]: Without dead ends: 8867 [2020-12-22 07:21:21,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:21:21,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8867 states. [2020-12-22 07:21:22,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8867 to 6658. [2020-12-22 07:21:22,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6658 states. [2020-12-22 07:21:22,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6658 states to 6658 states and 10939 transitions. [2020-12-22 07:21:22,245 INFO L78 Accepts]: Start accepts. Automaton has 6658 states and 10939 transitions. Word has length 120 [2020-12-22 07:21:22,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:22,245 INFO L481 AbstractCegarLoop]: Abstraction has 6658 states and 10939 transitions. [2020-12-22 07:21:22,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:21:22,246 INFO L276 IsEmpty]: Start isEmpty. Operand 6658 states and 10939 transitions. [2020-12-22 07:21:22,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 07:21:22,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:22,251 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:22,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:21:22,252 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:22,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:22,253 INFO L82 PathProgramCache]: Analyzing trace with hash -692698790, now seen corresponding path program 1 times [2020-12-22 07:21:22,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:22,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520164759] [2020-12-22 07:21:22,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:22,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:22,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:21:22,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520164759] [2020-12-22 07:21:22,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:22,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:21:22,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81315166] [2020-12-22 07:21:22,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:21:22,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:22,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:21:22,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:21:22,371 INFO L87 Difference]: Start difference. First operand 6658 states and 10939 transitions. Second operand 4 states. [2020-12-22 07:21:22,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:22,818 INFO L93 Difference]: Finished difference Result 19580 states and 32280 transitions. [2020-12-22 07:21:22,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:21:22,820 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 121 [2020-12-22 07:21:22,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:22,851 INFO L225 Difference]: With dead ends: 19580 [2020-12-22 07:21:22,851 INFO L226 Difference]: Without dead ends: 13102 [2020-12-22 07:21:22,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:21:22,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13102 states. [2020-12-22 07:21:23,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13102 to 9846. [2020-12-22 07:21:23,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9846 states. [2020-12-22 07:21:23,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9846 states to 9846 states and 16161 transitions. [2020-12-22 07:21:23,416 INFO L78 Accepts]: Start accepts. Automaton has 9846 states and 16161 transitions. Word has length 121 [2020-12-22 07:21:23,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:23,417 INFO L481 AbstractCegarLoop]: Abstraction has 9846 states and 16161 transitions. [2020-12-22 07:21:23,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:21:23,417 INFO L276 IsEmpty]: Start isEmpty. Operand 9846 states and 16161 transitions. [2020-12-22 07:21:23,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 07:21:23,424 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:23,424 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:23,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:21:23,425 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:23,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:23,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1392559596, now seen corresponding path program 1 times [2020-12-22 07:21:23,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:23,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370482162] [2020-12-22 07:21:23,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:23,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:23,531 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 07:21:23,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370482162] [2020-12-22 07:21:23,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:23,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:23,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186183975] [2020-12-22 07:21:23,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:23,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:23,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:23,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:23,534 INFO L87 Difference]: Start difference. First operand 9846 states and 16161 transitions. Second operand 3 states. [2020-12-22 07:21:24,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:24,003 INFO L93 Difference]: Finished difference Result 20154 states and 33062 transitions. [2020-12-22 07:21:24,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:24,003 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2020-12-22 07:21:24,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:24,036 INFO L225 Difference]: With dead ends: 20154 [2020-12-22 07:21:24,036 INFO L226 Difference]: Without dead ends: 14670 [2020-12-22 07:21:24,046 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 07:21:24,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14670 states. [2020-12-22 07:21:24,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14670 to 14668. [2020-12-22 07:21:24,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14668 states. [2020-12-22 07:21:24,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14668 states to 14668 states and 23914 transitions. [2020-12-22 07:21:24,637 INFO L78 Accepts]: Start accepts. Automaton has 14668 states and 23914 transitions. Word has length 121 [2020-12-22 07:21:24,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:24,637 INFO L481 AbstractCegarLoop]: Abstraction has 14668 states and 23914 transitions. [2020-12-22 07:21:24,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:24,637 INFO L276 IsEmpty]: Start isEmpty. Operand 14668 states and 23914 transitions. [2020-12-22 07:21:24,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 07:21:24,642 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:24,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:24,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:21:24,642 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:24,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:24,643 INFO L82 PathProgramCache]: Analyzing trace with hash -508078622, now seen corresponding path program 1 times [2020-12-22 07:21:24,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:24,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686234399] [2020-12-22 07:21:24,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:24,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:24,732 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 07:21:24,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686234399] [2020-12-22 07:21:24,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:24,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:24,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453700410] [2020-12-22 07:21:24,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:24,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:24,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:24,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:24,735 INFO L87 Difference]: Start difference. First operand 14668 states and 23914 transitions. Second operand 3 states. [2020-12-22 07:21:25,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:25,310 INFO L93 Difference]: Finished difference Result 31854 states and 52088 transitions. [2020-12-22 07:21:25,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:25,311 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2020-12-22 07:21:25,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:25,361 INFO L225 Difference]: With dead ends: 31854 [2020-12-22 07:21:25,361 INFO L226 Difference]: Without dead ends: 21906 [2020-12-22 07:21:25,379 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 07:21:25,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21906 states. [2020-12-22 07:21:26,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21906 to 21904. [2020-12-22 07:21:26,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21904 states. [2020-12-22 07:21:26,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21904 states to 21904 states and 35608 transitions. [2020-12-22 07:21:26,336 INFO L78 Accepts]: Start accepts. Automaton has 21904 states and 35608 transitions. Word has length 121 [2020-12-22 07:21:26,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:26,337 INFO L481 AbstractCegarLoop]: Abstraction has 21904 states and 35608 transitions. [2020-12-22 07:21:26,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:26,337 INFO L276 IsEmpty]: Start isEmpty. Operand 21904 states and 35608 transitions. [2020-12-22 07:21:26,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 07:21:26,342 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:26,343 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:26,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:21:26,343 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:26,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:26,344 INFO L82 PathProgramCache]: Analyzing trace with hash 347276588, now seen corresponding path program 1 times [2020-12-22 07:21:26,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:26,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78218956] [2020-12-22 07:21:26,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:26,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:26,436 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 07:21:26,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78218956] [2020-12-22 07:21:26,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:26,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:26,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240246231] [2020-12-22 07:21:26,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:26,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:26,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:26,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:26,439 INFO L87 Difference]: Start difference. First operand 21904 states and 35608 transitions. Second operand 3 states. [2020-12-22 07:21:27,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:27,362 INFO L93 Difference]: Finished difference Result 48074 states and 78304 transitions. [2020-12-22 07:21:27,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:27,362 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2020-12-22 07:21:27,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:27,451 INFO L225 Difference]: With dead ends: 48074 [2020-12-22 07:21:27,451 INFO L226 Difference]: Without dead ends: 32917 [2020-12-22 07:21:27,486 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 07:21:27,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32917 states. [2020-12-22 07:21:28,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32917 to 32915. [2020-12-22 07:21:28,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32915 states. [2020-12-22 07:21:28,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32915 states to 32915 states and 53263 transitions. [2020-12-22 07:21:28,781 INFO L78 Accepts]: Start accepts. Automaton has 32915 states and 53263 transitions. Word has length 121 [2020-12-22 07:21:28,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:28,782 INFO L481 AbstractCegarLoop]: Abstraction has 32915 states and 53263 transitions. [2020-12-22 07:21:28,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:28,782 INFO L276 IsEmpty]: Start isEmpty. Operand 32915 states and 53263 transitions. [2020-12-22 07:21:28,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 07:21:28,784 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:28,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:28,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:21:28,785 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:28,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:28,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1776587102, now seen corresponding path program 1 times [2020-12-22 07:21:28,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:28,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341160850] [2020-12-22 07:21:28,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:28,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:28,863 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 07:21:28,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341160850] [2020-12-22 07:21:28,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:28,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:28,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960220025] [2020-12-22 07:21:28,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:28,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:28,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:28,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:28,865 INFO L87 Difference]: Start difference. First operand 32915 states and 53263 transitions. Second operand 3 states. [2020-12-22 07:21:30,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:30,370 INFO L93 Difference]: Finished difference Result 73118 states and 119141 transitions. [2020-12-22 07:21:30,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:30,371 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2020-12-22 07:21:30,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:30,517 INFO L225 Difference]: With dead ends: 73118 [2020-12-22 07:21:30,518 INFO L226 Difference]: Without dead ends: 49789 [2020-12-22 07:21:30,562 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 07:21:30,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49789 states. [2020-12-22 07:21:32,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49789 to 49787. [2020-12-22 07:21:32,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49787 states. [2020-12-22 07:21:32,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49787 states to 49787 states and 80380 transitions. [2020-12-22 07:21:32,283 INFO L78 Accepts]: Start accepts. Automaton has 49787 states and 80380 transitions. Word has length 121 [2020-12-22 07:21:32,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:32,284 INFO L481 AbstractCegarLoop]: Abstraction has 49787 states and 80380 transitions. [2020-12-22 07:21:32,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:32,284 INFO L276 IsEmpty]: Start isEmpty. Operand 49787 states and 80380 transitions. [2020-12-22 07:21:32,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-22 07:21:32,286 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:32,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:32,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:21:32,286 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:32,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:32,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1586419690, now seen corresponding path program 1 times [2020-12-22 07:21:32,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:32,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921262915] [2020-12-22 07:21:32,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:32,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:32,392 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 07:21:32,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921262915] [2020-12-22 07:21:32,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:32,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:21:32,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527975681] [2020-12-22 07:21:32,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:21:32,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:32,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:21:32,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:21:32,395 INFO L87 Difference]: Start difference. First operand 49787 states and 80380 transitions. Second operand 4 states. [2020-12-22 07:21:35,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:35,108 INFO L93 Difference]: Finished difference Result 160321 states and 259529 transitions. [2020-12-22 07:21:35,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:21:35,108 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2020-12-22 07:21:35,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:35,355 INFO L225 Difference]: With dead ends: 160321 [2020-12-22 07:21:35,355 INFO L226 Difference]: Without dead ends: 110755 [2020-12-22 07:21:35,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:21:35,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110755 states. [2020-12-22 07:21:38,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110755 to 80046. [2020-12-22 07:21:38,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80046 states. [2020-12-22 07:21:38,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80046 states to 80046 states and 128828 transitions. [2020-12-22 07:21:38,407 INFO L78 Accepts]: Start accepts. Automaton has 80046 states and 128828 transitions. Word has length 122 [2020-12-22 07:21:38,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:38,409 INFO L481 AbstractCegarLoop]: Abstraction has 80046 states and 128828 transitions. [2020-12-22 07:21:38,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:21:38,409 INFO L276 IsEmpty]: Start isEmpty. Operand 80046 states and 128828 transitions. [2020-12-22 07:21:38,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 07:21:38,430 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:38,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:38,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:21:38,431 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:38,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:38,434 INFO L82 PathProgramCache]: Analyzing trace with hash -2052084626, now seen corresponding path program 1 times [2020-12-22 07:21:38,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:38,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138849839] [2020-12-22 07:21:38,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:38,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:38,649 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 07:21:38,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138849839] [2020-12-22 07:21:38,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:38,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:21:38,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364397533] [2020-12-22 07:21:38,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:21:38,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:38,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:21:38,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:21:38,654 INFO L87 Difference]: Start difference. First operand 80046 states and 128828 transitions. Second operand 6 states. [2020-12-22 07:21:40,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:40,759 INFO L93 Difference]: Finished difference Result 159873 states and 257298 transitions. [2020-12-22 07:21:40,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:21:40,760 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 124 [2020-12-22 07:21:40,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:41,006 INFO L225 Difference]: With dead ends: 159873 [2020-12-22 07:21:41,007 INFO L226 Difference]: Without dead ends: 80048 [2020-12-22 07:21:41,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:21:41,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80048 states. [2020-12-22 07:21:43,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80048 to 80046. [2020-12-22 07:21:43,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80046 states. [2020-12-22 07:21:43,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80046 states to 80046 states and 128203 transitions. [2020-12-22 07:21:43,361 INFO L78 Accepts]: Start accepts. Automaton has 80046 states and 128203 transitions. Word has length 124 [2020-12-22 07:21:43,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:43,361 INFO L481 AbstractCegarLoop]: Abstraction has 80046 states and 128203 transitions. [2020-12-22 07:21:43,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:21:43,361 INFO L276 IsEmpty]: Start isEmpty. Operand 80046 states and 128203 transitions. [2020-12-22 07:21:43,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:21:43,363 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:43,363 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:43,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:21:43,363 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:43,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:43,364 INFO L82 PathProgramCache]: Analyzing trace with hash -135993123, now seen corresponding path program 1 times [2020-12-22 07:21:43,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:43,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564591073] [2020-12-22 07:21:43,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:43,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:43,543 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 07:21:43,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564591073] [2020-12-22 07:21:43,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:43,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:21:43,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603333489] [2020-12-22 07:21:43,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:21:43,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:43,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:21:43,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:21:43,545 INFO L87 Difference]: Start difference. First operand 80046 states and 128203 transitions. Second operand 6 states. [2020-12-22 07:21:47,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:47,681 INFO L93 Difference]: Finished difference Result 261113 states and 419563 transitions. [2020-12-22 07:21:47,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:21:47,681 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 127 [2020-12-22 07:21:47,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:47,981 INFO L225 Difference]: With dead ends: 261113 [2020-12-22 07:21:47,981 INFO L226 Difference]: Without dead ends: 181288 [2020-12-22 07:21:48,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:21:48,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181288 states. [2020-12-22 07:21:53,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181288 to 181284. [2020-12-22 07:21:53,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181284 states. [2020-12-22 07:21:53,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181284 states to 181284 states and 289700 transitions. [2020-12-22 07:21:53,436 INFO L78 Accepts]: Start accepts. Automaton has 181284 states and 289700 transitions. Word has length 127 [2020-12-22 07:21:53,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:53,436 INFO L481 AbstractCegarLoop]: Abstraction has 181284 states and 289700 transitions. [2020-12-22 07:21:53,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:21:53,436 INFO L276 IsEmpty]: Start isEmpty. Operand 181284 states and 289700 transitions. [2020-12-22 07:21:53,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-22 07:21:53,437 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:53,438 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:53,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:21:53,438 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:53,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:53,439 INFO L82 PathProgramCache]: Analyzing trace with hash -352164905, now seen corresponding path program 1 times [2020-12-22 07:21:53,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:53,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791964831] [2020-12-22 07:21:53,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:53,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:53,609 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 07:21:53,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791964831] [2020-12-22 07:21:53,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:53,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:21:53,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422290192] [2020-12-22 07:21:53,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:21:53,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:53,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:21:53,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:21:53,611 INFO L87 Difference]: Start difference. First operand 181284 states and 289700 transitions. Second operand 8 states. [2020-12-22 07:22:02,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:02,391 INFO L93 Difference]: Finished difference Result 354291 states and 561328 transitions. [2020-12-22 07:22:02,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:22:02,391 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 128 [2020-12-22 07:22:02,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:03,040 INFO L225 Difference]: With dead ends: 354291 [2020-12-22 07:22:03,040 INFO L226 Difference]: Without dead ends: 354289 [2020-12-22 07:22:03,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:22:03,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354289 states. [2020-12-22 07:22:10,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354289 to 188268. [2020-12-22 07:22:10,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188268 states. [2020-12-22 07:22:10,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188268 states to 188268 states and 296657 transitions. [2020-12-22 07:22:10,891 INFO L78 Accepts]: Start accepts. Automaton has 188268 states and 296657 transitions. Word has length 128 [2020-12-22 07:22:10,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:10,892 INFO L481 AbstractCegarLoop]: Abstraction has 188268 states and 296657 transitions. [2020-12-22 07:22:10,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:22:10,892 INFO L276 IsEmpty]: Start isEmpty. Operand 188268 states and 296657 transitions. [2020-12-22 07:22:10,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-12-22 07:22:10,899 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:10,900 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:22:10,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:22:10,900 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:10,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:10,901 INFO L82 PathProgramCache]: Analyzing trace with hash -771218188, now seen corresponding path program 1 times [2020-12-22 07:22:10,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:10,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703340743] [2020-12-22 07:22:10,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:10,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:11,379 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-22 07:22:11,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703340743] [2020-12-22 07:22:11,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:11,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:22:11,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216877929] [2020-12-22 07:22:11,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:22:11,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:11,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:22:11,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:22:11,385 INFO L87 Difference]: Start difference. First operand 188268 states and 296657 transitions. Second operand 6 states. [2020-12-22 07:22:20,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:20,519 INFO L93 Difference]: Finished difference Result 420529 states and 664443 transitions. [2020-12-22 07:22:20,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:22:20,520 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 164 [2020-12-22 07:22:20,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:21,167 INFO L225 Difference]: With dead ends: 420529 [2020-12-22 07:22:21,167 INFO L226 Difference]: Without dead ends: 335427 [2020-12-22 07:22:21,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:22:21,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335427 states. [2020-12-22 07:22:30,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335427 to 260959. [2020-12-22 07:22:30,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260959 states. [2020-12-22 07:22:31,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260959 states to 260959 states and 410632 transitions. [2020-12-22 07:22:31,234 INFO L78 Accepts]: Start accepts. Automaton has 260959 states and 410632 transitions. Word has length 164 [2020-12-22 07:22:31,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:31,236 INFO L481 AbstractCegarLoop]: Abstraction has 260959 states and 410632 transitions. [2020-12-22 07:22:31,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:22:31,237 INFO L276 IsEmpty]: Start isEmpty. Operand 260959 states and 410632 transitions. [2020-12-22 07:22:31,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-12-22 07:22:31,244 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:31,244 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:22:31,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:22:31,245 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:31,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:31,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1623110890, now seen corresponding path program 1 times [2020-12-22 07:22:31,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:31,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657784846] [2020-12-22 07:22:31,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:31,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:31,872 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 07:22:31,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657784846] [2020-12-22 07:22:31,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:31,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:22:31,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311422604] [2020-12-22 07:22:31,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:22:31,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:31,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:22:31,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:22:31,874 INFO L87 Difference]: Start difference. First operand 260959 states and 410632 transitions. Second operand 6 states. [2020-12-22 07:22:41,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:41,832 INFO L93 Difference]: Finished difference Result 443129 states and 700151 transitions. [2020-12-22 07:22:41,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:22:41,832 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 164 [2020-12-22 07:22:41,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:42,709 INFO L225 Difference]: With dead ends: 443129 [2020-12-22 07:22:42,709 INFO L226 Difference]: Without dead ends: 358027 [2020-12-22 07:22:42,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:22:43,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358027 states. [2020-12-22 07:22:56,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358027 to 330875. [2020-12-22 07:22:56,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330875 states. [2020-12-22 07:22:57,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330875 states to 330875 states and 520696 transitions. [2020-12-22 07:22:57,510 INFO L78 Accepts]: Start accepts. Automaton has 330875 states and 520696 transitions. Word has length 164 [2020-12-22 07:22:57,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:57,512 INFO L481 AbstractCegarLoop]: Abstraction has 330875 states and 520696 transitions. [2020-12-22 07:22:57,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:22:57,512 INFO L276 IsEmpty]: Start isEmpty. Operand 330875 states and 520696 transitions. [2020-12-22 07:22:57,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-12-22 07:22:57,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:57,538 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:22:57,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:22:57,538 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:57,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:57,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1816501196, now seen corresponding path program 1 times [2020-12-22 07:22:57,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:57,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879684116] [2020-12-22 07:22:57,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:57,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:57,701 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:22:57,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879684116] [2020-12-22 07:22:57,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:57,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:22:57,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770286453] [2020-12-22 07:22:57,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:22:57,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:57,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:22:57,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:22:57,705 INFO L87 Difference]: Start difference. First operand 330875 states and 520696 transitions. Second operand 6 states. [2020-12-22 07:23:09,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:09,345 INFO L93 Difference]: Finished difference Result 479289 states and 757383 transitions. [2020-12-22 07:23:09,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:23:09,346 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 164 [2020-12-22 07:23:09,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:10,155 INFO L225 Difference]: With dead ends: 479289 [2020-12-22 07:23:10,155 INFO L226 Difference]: Without dead ends: 394187 [2020-12-22 07:23:10,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:23:10,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394187 states. [2020-12-22 07:23:23,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394187 to 372291. [2020-12-22 07:23:23,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372291 states. [2020-12-22 07:23:24,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372291 states to 372291 states and 586340 transitions. [2020-12-22 07:23:24,541 INFO L78 Accepts]: Start accepts. Automaton has 372291 states and 586340 transitions. Word has length 164 [2020-12-22 07:23:24,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:24,542 INFO L481 AbstractCegarLoop]: Abstraction has 372291 states and 586340 transitions. [2020-12-22 07:23:24,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:23:24,542 INFO L276 IsEmpty]: Start isEmpty. Operand 372291 states and 586340 transitions. [2020-12-22 07:23:24,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-12-22 07:23:24,567 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:24,568 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:23:24,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:23:24,568 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:24,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:24,569 INFO L82 PathProgramCache]: Analyzing trace with hash 354602410, now seen corresponding path program 1 times [2020-12-22 07:23:24,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:24,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204783156] [2020-12-22 07:23:24,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:24,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:24,737 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:23:24,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204783156] [2020-12-22 07:23:24,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:24,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:23:24,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232410555] [2020-12-22 07:23:24,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:23:24,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:24,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:23:24,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:23:24,743 INFO L87 Difference]: Start difference. First operand 372291 states and 586340 transitions. Second operand 6 states. [2020-12-22 07:23:40,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:40,240 INFO L93 Difference]: Finished difference Result 608829 states and 964809 transitions. [2020-12-22 07:23:40,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:23:40,240 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 164 [2020-12-22 07:23:40,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:41,542 INFO L225 Difference]: With dead ends: 608829 [2020-12-22 07:23:41,542 INFO L226 Difference]: Without dead ends: 508603 [2020-12-22 07:23:41,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:23:42,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508603 states. [2020-12-22 07:24:01,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508603 to 456963. [2020-12-22 07:24:01,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456963 states. [2020-12-22 07:24:03,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456963 states to 456963 states and 721048 transitions. [2020-12-22 07:24:03,613 INFO L78 Accepts]: Start accepts. Automaton has 456963 states and 721048 transitions. Word has length 164 [2020-12-22 07:24:03,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:03,613 INFO L481 AbstractCegarLoop]: Abstraction has 456963 states and 721048 transitions. [2020-12-22 07:24:03,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:24:03,613 INFO L276 IsEmpty]: Start isEmpty. Operand 456963 states and 721048 transitions. [2020-12-22 07:24:03,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-12-22 07:24:03,620 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:03,635 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:03,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:24:03,636 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:03,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:03,637 INFO L82 PathProgramCache]: Analyzing trace with hash 308133409, now seen corresponding path program 1 times [2020-12-22 07:24:03,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:03,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682659095] [2020-12-22 07:24:03,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:03,763 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:24:03,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682659095] [2020-12-22 07:24:03,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:03,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:24:03,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364328258] [2020-12-22 07:24:03,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:24:03,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:03,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:24:03,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:03,769 INFO L87 Difference]: Start difference. First operand 456963 states and 721048 transitions. Second operand 4 states. [2020-12-22 07:24:18,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:18,456 INFO L93 Difference]: Finished difference Result 642041 states and 1015707 transitions. [2020-12-22 07:24:18,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:24:18,456 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 165 [2020-12-22 07:24:18,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:19,419 INFO L225 Difference]: With dead ends: 642041 [2020-12-22 07:24:19,420 INFO L226 Difference]: Without dead ends: 457143 [2020-12-22 07:24:19,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:20,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457143 states. [2020-12-22 07:24:37,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457143 to 431795. [2020-12-22 07:24:37,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 431795 states. [2020-12-22 07:24:39,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431795 states to 431795 states and 679244 transitions. [2020-12-22 07:24:39,474 INFO L78 Accepts]: Start accepts. Automaton has 431795 states and 679244 transitions. Word has length 165 [2020-12-22 07:24:39,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:39,475 INFO L481 AbstractCegarLoop]: Abstraction has 431795 states and 679244 transitions. [2020-12-22 07:24:39,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:24:39,475 INFO L276 IsEmpty]: Start isEmpty. Operand 431795 states and 679244 transitions. [2020-12-22 07:24:39,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-12-22 07:24:39,482 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:39,484 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:39,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:24:39,485 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:39,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:39,486 INFO L82 PathProgramCache]: Analyzing trace with hash 330765663, now seen corresponding path program 1 times [2020-12-22 07:24:39,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:39,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878297967] [2020-12-22 07:24:39,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:39,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:40,530 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:24:40,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878297967] [2020-12-22 07:24:40,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:40,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:40,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188031364] [2020-12-22 07:24:40,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:40,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:40,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:40,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:40,532 INFO L87 Difference]: Start difference. First operand 431795 states and 679244 transitions. Second operand 3 states.