/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:19:16,963 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:19:16,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:19:17,001 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:19:17,002 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:19:17,003 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:19:17,005 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:19:17,008 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:19:17,016 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:19:17,018 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:19:17,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:19:17,021 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:19:17,021 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:19:17,023 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:19:17,024 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:19:17,026 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:19:17,027 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:19:17,028 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:19:17,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:19:17,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:19:17,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:19:17,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:19:17,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:19:17,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:19:17,042 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:19:17,052 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:19:17,055 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:19:17,055 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:19:17,056 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:19:17,060 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:19:17,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:19:17,061 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:19:17,062 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:19:17,062 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:19:17,064 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:19:17,065 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:19:17,066 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:19:17,130 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:19:17,130 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:19:17,132 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:19:17,133 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:19:17,133 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:19:17,133 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:19:17,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:19:17,134 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:19:17,136 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:19:17,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:19:17,138 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:19:17,138 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:19:17,139 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:19:17,139 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:19:17,139 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:19:17,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:19:17,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:19:17,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:19:17,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:19:17,141 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:19:17,142 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:19:17,142 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:19:17,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:19:17,142 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:19:17,143 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:19:17,143 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:19:17,571 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:19:17,611 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:19:17,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:19:17,616 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:19:17,617 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:19:17,618 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 08:19:17,703 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6dbdf0723/8731da1cd7794689854813589264bd8b/FLAGfc310c9e9 [2020-12-22 08:19:18,334 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:19:18,334 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 08:19:18,350 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6dbdf0723/8731da1cd7794689854813589264bd8b/FLAGfc310c9e9 [2020-12-22 08:19:18,681 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6dbdf0723/8731da1cd7794689854813589264bd8b [2020-12-22 08:19:18,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:19:18,689 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:19:18,691 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:19:18,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:19:18,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:19:18,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:19:18" (1/1) ... [2020-12-22 08:19:18,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7432ae3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:18, skipping insertion in model container [2020-12-22 08:19:18,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:19:18" (1/1) ... [2020-12-22 08:19:18,708 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:19:18,742 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:19:18,939 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[3967,3980] [2020-12-22 08:19:18,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:19:18,978 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:19:19,017 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[3967,3980] [2020-12-22 08:19:19,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:19:19,085 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:19:19,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:19 WrapperNode [2020-12-22 08:19:19,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:19:19,089 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:19:19,089 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:19:19,089 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:19:19,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:19" (1/1) ... [2020-12-22 08:19:19,123 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:19" (1/1) ... [2020-12-22 08:19:19,185 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:19:19,186 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:19:19,186 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:19:19,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:19:19,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:19" (1/1) ... [2020-12-22 08:19:19,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:19" (1/1) ... [2020-12-22 08:19:19,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:19" (1/1) ... [2020-12-22 08:19:19,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:19" (1/1) ... [2020-12-22 08:19:19,236 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:19" (1/1) ... [2020-12-22 08:19:19,241 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:19" (1/1) ... [2020-12-22 08:19:19,246 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:19" (1/1) ... [2020-12-22 08:19:19,255 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:19:19,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:19:19,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:19:19,257 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:19:19,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:19:19,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:19:19,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:19:19,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:19:19,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:19:20,206 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:19:20,207 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:19:20,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:19:20 BoogieIcfgContainer [2020-12-22 08:19:20,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:19:20,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:19:20,213 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:19:20,217 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:19:20,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:19:18" (1/3) ... [2020-12-22 08:19:20,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c5cfcf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:19:20, skipping insertion in model container [2020-12-22 08:19:20,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:19:19" (2/3) ... [2020-12-22 08:19:20,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c5cfcf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:19:20, skipping insertion in model container [2020-12-22 08:19:20,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:19:20" (3/3) ... [2020-12-22 08:19:20,224 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 08:19:20,232 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:19:20,237 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:19:20,259 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:19:20,305 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:19:20,305 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:19:20,306 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:19:20,306 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:19:20,306 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:19:20,306 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:19:20,306 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:19:20,307 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:19:20,327 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states. [2020-12-22 08:19:20,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 08:19:20,338 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:20,339 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:19:20,340 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:20,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:20,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1258202004, now seen corresponding path program 1 times [2020-12-22 08:19:20,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:20,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2485149] [2020-12-22 08:19:20,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:20,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:20,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:19:20,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2485149] [2020-12-22 08:19:20,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:20,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:19:20,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699490439] [2020-12-22 08:19:20,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:19:20,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:20,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:19:20,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:19:20,662 INFO L87 Difference]: Start difference. First operand 85 states. Second operand 3 states. [2020-12-22 08:19:20,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:20,733 INFO L93 Difference]: Finished difference Result 199 states and 318 transitions. [2020-12-22 08:19:20,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:19:20,735 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-12-22 08:19:20,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:20,749 INFO L225 Difference]: With dead ends: 199 [2020-12-22 08:19:20,749 INFO L226 Difference]: Without dead ends: 128 [2020-12-22 08:19:20,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:19:20,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-22 08:19:20,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2020-12-22 08:19:20,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-12-22 08:19:20,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 188 transitions. [2020-12-22 08:19:20,816 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 188 transitions. Word has length 37 [2020-12-22 08:19:20,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:20,817 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 188 transitions. [2020-12-22 08:19:20,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:19:20,817 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 188 transitions. [2020-12-22 08:19:20,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 08:19:20,819 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:20,819 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:19:20,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:19:20,820 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:20,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:20,821 INFO L82 PathProgramCache]: Analyzing trace with hash 2004783502, now seen corresponding path program 1 times [2020-12-22 08:19:20,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:20,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765704119] [2020-12-22 08:19:20,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:20,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:20,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:19:20,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765704119] [2020-12-22 08:19:20,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:20,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:19:20,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271642138] [2020-12-22 08:19:20,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:19:20,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:20,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:19:20,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:19:20,937 INFO L87 Difference]: Start difference. First operand 126 states and 188 transitions. Second operand 3 states. [2020-12-22 08:19:20,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:20,997 INFO L93 Difference]: Finished difference Result 306 states and 472 transitions. [2020-12-22 08:19:21,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:19:21,001 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-12-22 08:19:21,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:21,007 INFO L225 Difference]: With dead ends: 306 [2020-12-22 08:19:21,008 INFO L226 Difference]: Without dead ends: 200 [2020-12-22 08:19:21,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:19:21,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-22 08:19:21,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 198. [2020-12-22 08:19:21,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-22 08:19:21,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 301 transitions. [2020-12-22 08:19:21,057 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 301 transitions. Word has length 38 [2020-12-22 08:19:21,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:21,058 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 301 transitions. [2020-12-22 08:19:21,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:19:21,058 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 301 transitions. [2020-12-22 08:19:21,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 08:19:21,059 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:21,060 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:19:21,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:19:21,060 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:21,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:21,061 INFO L82 PathProgramCache]: Analyzing trace with hash 337157617, now seen corresponding path program 1 times [2020-12-22 08:19:21,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:21,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485580241] [2020-12-22 08:19:21,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:21,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:21,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:19:21,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485580241] [2020-12-22 08:19:21,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:21,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:19:21,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957683598] [2020-12-22 08:19:21,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:19:21,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:21,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:19:21,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:19:21,154 INFO L87 Difference]: Start difference. First operand 198 states and 301 transitions. Second operand 3 states. [2020-12-22 08:19:21,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:21,245 INFO L93 Difference]: Finished difference Result 490 states and 759 transitions. [2020-12-22 08:19:21,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:19:21,251 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2020-12-22 08:19:21,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:21,257 INFO L225 Difference]: With dead ends: 490 [2020-12-22 08:19:21,257 INFO L226 Difference]: Without dead ends: 312 [2020-12-22 08:19:21,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:19:21,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-12-22 08:19:21,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 310. [2020-12-22 08:19:21,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-12-22 08:19:21,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 473 transitions. [2020-12-22 08:19:21,318 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 473 transitions. Word has length 39 [2020-12-22 08:19:21,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:21,319 INFO L481 AbstractCegarLoop]: Abstraction has 310 states and 473 transitions. [2020-12-22 08:19:21,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:19:21,319 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 473 transitions. [2020-12-22 08:19:21,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 08:19:21,320 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:21,321 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] [2020-12-22 08:19:21,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:19:21,321 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:21,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:21,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1621587317, now seen corresponding path program 1 times [2020-12-22 08:19:21,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:21,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925943285] [2020-12-22 08:19:21,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:21,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:21,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:19:21,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925943285] [2020-12-22 08:19:21,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:21,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:19:21,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167728699] [2020-12-22 08:19:21,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:19:21,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:21,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:19:21,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:19:21,539 INFO L87 Difference]: Start difference. First operand 310 states and 473 transitions. Second operand 5 states. [2020-12-22 08:19:21,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:21,676 INFO L93 Difference]: Finished difference Result 1048 states and 1616 transitions. [2020-12-22 08:19:21,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:19:21,677 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2020-12-22 08:19:21,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:21,682 INFO L225 Difference]: With dead ends: 1048 [2020-12-22 08:19:21,683 INFO L226 Difference]: Without dead ends: 758 [2020-12-22 08:19:21,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:19:21,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2020-12-22 08:19:21,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 754. [2020-12-22 08:19:21,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 754 states. [2020-12-22 08:19:21,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1153 transitions. [2020-12-22 08:19:21,752 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1153 transitions. Word has length 40 [2020-12-22 08:19:21,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:21,752 INFO L481 AbstractCegarLoop]: Abstraction has 754 states and 1153 transitions. [2020-12-22 08:19:21,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:19:21,753 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1153 transitions. [2020-12-22 08:19:21,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 08:19:21,754 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:21,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:19:21,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:19:21,755 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:21,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:21,756 INFO L82 PathProgramCache]: Analyzing trace with hash 696518910, now seen corresponding path program 1 times [2020-12-22 08:19:21,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:21,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053923275] [2020-12-22 08:19:21,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:21,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:19:21,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053923275] [2020-12-22 08:19:21,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:21,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:19:21,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875537327] [2020-12-22 08:19:21,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:19:21,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:21,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:19:21,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:19:21,864 INFO L87 Difference]: Start difference. First operand 754 states and 1153 transitions. Second operand 6 states. [2020-12-22 08:19:22,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:22,301 INFO L93 Difference]: Finished difference Result 2900 states and 4456 transitions. [2020-12-22 08:19:22,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:19:22,302 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2020-12-22 08:19:22,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:22,315 INFO L225 Difference]: With dead ends: 2900 [2020-12-22 08:19:22,315 INFO L226 Difference]: Without dead ends: 2166 [2020-12-22 08:19:22,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:19:22,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2166 states. [2020-12-22 08:19:22,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2166 to 2162. [2020-12-22 08:19:22,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2162 states. [2020-12-22 08:19:22,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2162 states to 2162 states and 3305 transitions. [2020-12-22 08:19:22,499 INFO L78 Accepts]: Start accepts. Automaton has 2162 states and 3305 transitions. Word has length 42 [2020-12-22 08:19:22,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:22,500 INFO L481 AbstractCegarLoop]: Abstraction has 2162 states and 3305 transitions. [2020-12-22 08:19:22,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:19:22,500 INFO L276 IsEmpty]: Start isEmpty. Operand 2162 states and 3305 transitions. [2020-12-22 08:19:22,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 08:19:22,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:22,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:19:22,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:19:22,503 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:22,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:22,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1026070499, now seen corresponding path program 1 times [2020-12-22 08:19:22,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:22,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743775269] [2020-12-22 08:19:22,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:22,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:19:22,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743775269] [2020-12-22 08:19:22,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:22,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:19:22,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305920908] [2020-12-22 08:19:22,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:19:22,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:22,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:19:22,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:19:22,620 INFO L87 Difference]: Start difference. First operand 2162 states and 3305 transitions. Second operand 5 states. [2020-12-22 08:19:23,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:23,276 INFO L93 Difference]: Finished difference Result 8726 states and 13357 transitions. [2020-12-22 08:19:23,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:19:23,276 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 08:19:23,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:23,311 INFO L225 Difference]: With dead ends: 8726 [2020-12-22 08:19:23,311 INFO L226 Difference]: Without dead ends: 6584 [2020-12-22 08:19:23,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:19:23,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6584 states. [2020-12-22 08:19:23,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6584 to 4302. [2020-12-22 08:19:23,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4302 states. [2020-12-22 08:19:23,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4302 states to 4302 states and 6445 transitions. [2020-12-22 08:19:23,760 INFO L78 Accepts]: Start accepts. Automaton has 4302 states and 6445 transitions. Word has length 42 [2020-12-22 08:19:23,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:23,763 INFO L481 AbstractCegarLoop]: Abstraction has 4302 states and 6445 transitions. [2020-12-22 08:19:23,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:19:23,763 INFO L276 IsEmpty]: Start isEmpty. Operand 4302 states and 6445 transitions. [2020-12-22 08:19:23,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 08:19:23,770 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:23,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:19:23,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:19:23,770 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:23,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:23,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1723958080, now seen corresponding path program 1 times [2020-12-22 08:19:23,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:23,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895852740] [2020-12-22 08:19:23,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:23,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:19:23,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895852740] [2020-12-22 08:19:23,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:23,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:19:23,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105006185] [2020-12-22 08:19:23,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:19:23,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:23,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:19:23,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:19:23,924 INFO L87 Difference]: Start difference. First operand 4302 states and 6445 transitions. Second operand 5 states. [2020-12-22 08:19:24,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:24,686 INFO L93 Difference]: Finished difference Result 8872 states and 13158 transitions. [2020-12-22 08:19:24,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:19:24,687 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-22 08:19:24,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:24,734 INFO L225 Difference]: With dead ends: 8872 [2020-12-22 08:19:24,735 INFO L226 Difference]: Without dead ends: 8870 [2020-12-22 08:19:24,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:19:24,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8870 states. [2020-12-22 08:19:25,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8870 to 4590. [2020-12-22 08:19:25,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4590 states. [2020-12-22 08:19:25,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4590 states to 4590 states and 6733 transitions. [2020-12-22 08:19:25,241 INFO L78 Accepts]: Start accepts. Automaton has 4590 states and 6733 transitions. Word has length 43 [2020-12-22 08:19:25,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:25,241 INFO L481 AbstractCegarLoop]: Abstraction has 4590 states and 6733 transitions. [2020-12-22 08:19:25,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:19:25,241 INFO L276 IsEmpty]: Start isEmpty. Operand 4590 states and 6733 transitions. [2020-12-22 08:19:25,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 08:19:25,242 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:25,242 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] [2020-12-22 08:19:25,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:19:25,243 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:25,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:25,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1913665939, now seen corresponding path program 1 times [2020-12-22 08:19:25,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:25,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019894885] [2020-12-22 08:19:25,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:25,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:19:25,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019894885] [2020-12-22 08:19:25,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:25,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:19:25,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223822606] [2020-12-22 08:19:25,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:19:25,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:25,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:19:25,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:19:25,293 INFO L87 Difference]: Start difference. First operand 4590 states and 6733 transitions. Second operand 3 states. [2020-12-22 08:19:25,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:25,848 INFO L93 Difference]: Finished difference Result 11122 states and 16319 transitions. [2020-12-22 08:19:25,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:19:25,848 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2020-12-22 08:19:25,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:25,928 INFO L225 Difference]: With dead ends: 11122 [2020-12-22 08:19:25,928 INFO L226 Difference]: Without dead ends: 6552 [2020-12-22 08:19:25,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:19:25,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6552 states. [2020-12-22 08:19:26,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6552 to 6550. [2020-12-22 08:19:26,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6550 states. [2020-12-22 08:19:26,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6550 states to 6550 states and 9545 transitions. [2020-12-22 08:19:26,594 INFO L78 Accepts]: Start accepts. Automaton has 6550 states and 9545 transitions. Word has length 44 [2020-12-22 08:19:26,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:26,595 INFO L481 AbstractCegarLoop]: Abstraction has 6550 states and 9545 transitions. [2020-12-22 08:19:26,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:19:26,595 INFO L276 IsEmpty]: Start isEmpty. Operand 6550 states and 9545 transitions. [2020-12-22 08:19:26,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 08:19:26,599 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:26,600 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:19:26,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:19:26,600 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:26,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:26,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1827424966, now seen corresponding path program 1 times [2020-12-22 08:19:26,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:26,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030391916] [2020-12-22 08:19:26,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:26,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:26,777 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 08:19:26,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030391916] [2020-12-22 08:19:26,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418473708] [2020-12-22 08:19:26,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 08:19:26,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:26,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 08:19:26,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:19:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 08:19:27,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:19:27,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2020-12-22 08:19:27,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001984109] [2020-12-22 08:19:27,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:19:27,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:27,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:19:27,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:19:27,099 INFO L87 Difference]: Start difference. First operand 6550 states and 9545 transitions. Second operand 6 states. [2020-12-22 08:19:28,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:28,220 INFO L93 Difference]: Finished difference Result 16122 states and 23573 transitions. [2020-12-22 08:19:28,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:19:28,223 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-12-22 08:19:28,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:28,258 INFO L225 Difference]: With dead ends: 16122 [2020-12-22 08:19:28,258 INFO L226 Difference]: Without dead ends: 11552 [2020-12-22 08:19:28,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:19:28,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11552 states. [2020-12-22 08:19:29,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11552 to 10782. [2020-12-22 08:19:29,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10782 states. [2020-12-22 08:19:29,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10782 states to 10782 states and 15585 transitions. [2020-12-22 08:19:29,306 INFO L78 Accepts]: Start accepts. Automaton has 10782 states and 15585 transitions. Word has length 61 [2020-12-22 08:19:29,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:29,307 INFO L481 AbstractCegarLoop]: Abstraction has 10782 states and 15585 transitions. [2020-12-22 08:19:29,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:19:29,307 INFO L276 IsEmpty]: Start isEmpty. Operand 10782 states and 15585 transitions. [2020-12-22 08:19:29,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:19:29,310 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:29,310 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:19:29,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 08:19:29,524 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:29,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:29,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1546173761, now seen corresponding path program 1 times [2020-12-22 08:19:29,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:29,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454475212] [2020-12-22 08:19:29,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:29,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:29,584 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:19:29,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454475212] [2020-12-22 08:19:29,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:29,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:19:29,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341762286] [2020-12-22 08:19:29,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:19:29,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:29,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:19:29,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:19:29,587 INFO L87 Difference]: Start difference. First operand 10782 states and 15585 transitions. Second operand 3 states. [2020-12-22 08:19:30,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:30,799 INFO L93 Difference]: Finished difference Result 24970 states and 35947 transitions. [2020-12-22 08:19:30,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:19:30,799 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 08:19:30,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:30,836 INFO L225 Difference]: With dead ends: 24970 [2020-12-22 08:19:30,837 INFO L226 Difference]: Without dead ends: 17132 [2020-12-22 08:19:30,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:19:30,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17132 states. [2020-12-22 08:19:31,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17132 to 17130. [2020-12-22 08:19:31,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17130 states. [2020-12-22 08:19:31,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17130 states to 17130 states and 24325 transitions. [2020-12-22 08:19:31,864 INFO L78 Accepts]: Start accepts. Automaton has 17130 states and 24325 transitions. Word has length 62 [2020-12-22 08:19:31,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:31,864 INFO L481 AbstractCegarLoop]: Abstraction has 17130 states and 24325 transitions. [2020-12-22 08:19:31,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:19:31,865 INFO L276 IsEmpty]: Start isEmpty. Operand 17130 states and 24325 transitions. [2020-12-22 08:19:31,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:19:31,868 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:31,869 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:19:31,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:19:31,869 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:31,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:31,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1797284354, now seen corresponding path program 1 times [2020-12-22 08:19:31,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:31,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888454926] [2020-12-22 08:19:31,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:31,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:31,941 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 08:19:31,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888454926] [2020-12-22 08:19:31,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:31,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:19:31,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673865555] [2020-12-22 08:19:31,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:19:31,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:31,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:19:31,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:19:31,943 INFO L87 Difference]: Start difference. First operand 17130 states and 24325 transitions. Second operand 5 states. [2020-12-22 08:19:33,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:33,639 INFO L93 Difference]: Finished difference Result 32844 states and 46959 transitions. [2020-12-22 08:19:33,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:19:33,640 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-12-22 08:19:33,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:33,701 INFO L225 Difference]: With dead ends: 32844 [2020-12-22 08:19:33,701 INFO L226 Difference]: Without dead ends: 25606 [2020-12-22 08:19:33,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:19:33,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25606 states. [2020-12-22 08:19:35,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25606 to 23004. [2020-12-22 08:19:35,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23004 states. [2020-12-22 08:19:35,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23004 states to 23004 states and 32543 transitions. [2020-12-22 08:19:35,479 INFO L78 Accepts]: Start accepts. Automaton has 23004 states and 32543 transitions. Word has length 62 [2020-12-22 08:19:35,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:35,479 INFO L481 AbstractCegarLoop]: Abstraction has 23004 states and 32543 transitions. [2020-12-22 08:19:35,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:19:35,480 INFO L276 IsEmpty]: Start isEmpty. Operand 23004 states and 32543 transitions. [2020-12-22 08:19:35,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:19:35,482 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:35,483 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:19:35,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:19:35,483 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:35,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:35,484 INFO L82 PathProgramCache]: Analyzing trace with hash 621000165, now seen corresponding path program 1 times [2020-12-22 08:19:35,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:35,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364982675] [2020-12-22 08:19:35,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:35,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:35,537 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:19:35,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364982675] [2020-12-22 08:19:35,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:35,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:19:35,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917600318] [2020-12-22 08:19:35,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:19:35,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:35,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:19:35,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:19:35,540 INFO L87 Difference]: Start difference. First operand 23004 states and 32543 transitions. Second operand 3 states. [2020-12-22 08:19:37,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:37,420 INFO L93 Difference]: Finished difference Result 38238 states and 53807 transitions. [2020-12-22 08:19:37,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:19:37,421 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 08:19:37,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:37,478 INFO L225 Difference]: With dead ends: 38238 [2020-12-22 08:19:37,479 INFO L226 Difference]: Without dead ends: 23835 [2020-12-22 08:19:37,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:19:37,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23835 states. [2020-12-22 08:19:39,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23835 to 20062. [2020-12-22 08:19:39,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20062 states. [2020-12-22 08:19:39,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20062 states to 20062 states and 27851 transitions. [2020-12-22 08:19:39,048 INFO L78 Accepts]: Start accepts. Automaton has 20062 states and 27851 transitions. Word has length 62 [2020-12-22 08:19:39,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:39,049 INFO L481 AbstractCegarLoop]: Abstraction has 20062 states and 27851 transitions. [2020-12-22 08:19:39,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:19:39,049 INFO L276 IsEmpty]: Start isEmpty. Operand 20062 states and 27851 transitions. [2020-12-22 08:19:39,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:19:39,053 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:39,053 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:19:39,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:19:39,054 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:39,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:39,054 INFO L82 PathProgramCache]: Analyzing trace with hash -922232594, now seen corresponding path program 1 times [2020-12-22 08:19:39,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:39,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613674051] [2020-12-22 08:19:39,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:39,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:39,125 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 08:19:39,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613674051] [2020-12-22 08:19:39,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:39,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:19:39,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447134124] [2020-12-22 08:19:39,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:19:39,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:39,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:19:39,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:19:39,128 INFO L87 Difference]: Start difference. First operand 20062 states and 27851 transitions. Second operand 6 states. [2020-12-22 08:19:42,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:42,882 INFO L93 Difference]: Finished difference Result 68107 states and 94112 transitions. [2020-12-22 08:19:42,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:19:42,883 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 62 [2020-12-22 08:19:42,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:42,981 INFO L225 Difference]: With dead ends: 68107 [2020-12-22 08:19:42,981 INFO L226 Difference]: Without dead ends: 48110 [2020-12-22 08:19:43,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:19:43,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48110 states. [2020-12-22 08:19:46,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48110 to 47684. [2020-12-22 08:19:46,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47684 states. [2020-12-22 08:19:46,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47684 states to 47684 states and 65549 transitions. [2020-12-22 08:19:46,476 INFO L78 Accepts]: Start accepts. Automaton has 47684 states and 65549 transitions. Word has length 62 [2020-12-22 08:19:46,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:46,476 INFO L481 AbstractCegarLoop]: Abstraction has 47684 states and 65549 transitions. [2020-12-22 08:19:46,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:19:46,476 INFO L276 IsEmpty]: Start isEmpty. Operand 47684 states and 65549 transitions. [2020-12-22 08:19:46,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:19:46,480 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:46,480 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:19:46,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:19:46,481 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:46,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:46,481 INFO L82 PathProgramCache]: Analyzing trace with hash 695272297, now seen corresponding path program 1 times [2020-12-22 08:19:46,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:46,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30159568] [2020-12-22 08:19:46,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:46,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 08:19:46,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30159568] [2020-12-22 08:19:46,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:46,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:19:46,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492181012] [2020-12-22 08:19:46,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:19:46,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:46,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:19:46,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:19:46,570 INFO L87 Difference]: Start difference. First operand 47684 states and 65549 transitions. Second operand 5 states. [2020-12-22 08:19:50,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:50,512 INFO L93 Difference]: Finished difference Result 71761 states and 99653 transitions. [2020-12-22 08:19:50,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:19:50,513 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-12-22 08:19:50,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:50,597 INFO L225 Difference]: With dead ends: 71761 [2020-12-22 08:19:50,597 INFO L226 Difference]: Without dead ends: 64323 [2020-12-22 08:19:50,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:19:50,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64323 states. [2020-12-22 08:19:54,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64323 to 54832. [2020-12-22 08:19:54,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54832 states. [2020-12-22 08:19:54,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54832 states to 54832 states and 75441 transitions. [2020-12-22 08:19:54,787 INFO L78 Accepts]: Start accepts. Automaton has 54832 states and 75441 transitions. Word has length 62 [2020-12-22 08:19:54,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:54,787 INFO L481 AbstractCegarLoop]: Abstraction has 54832 states and 75441 transitions. [2020-12-22 08:19:54,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:19:54,788 INFO L276 IsEmpty]: Start isEmpty. Operand 54832 states and 75441 transitions. [2020-12-22 08:19:54,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:19:54,793 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:54,793 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:19:54,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:19:54,793 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:54,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:54,794 INFO L82 PathProgramCache]: Analyzing trace with hash -237073659, now seen corresponding path program 1 times [2020-12-22 08:19:54,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:54,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882280400] [2020-12-22 08:19:54,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:54,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:54,887 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 08:19:54,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882280400] [2020-12-22 08:19:54,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:54,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:19:54,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218177759] [2020-12-22 08:19:54,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:19:54,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:54,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:19:54,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:19:54,891 INFO L87 Difference]: Start difference. First operand 54832 states and 75441 transitions. Second operand 5 states. [2020-12-22 08:19:59,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:59,466 INFO L93 Difference]: Finished difference Result 81327 states and 112952 transitions. [2020-12-22 08:19:59,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:19:59,467 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-12-22 08:19:59,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:59,539 INFO L225 Difference]: With dead ends: 81327 [2020-12-22 08:19:59,539 INFO L226 Difference]: Without dead ends: 69390 [2020-12-22 08:19:59,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:19:59,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69390 states. [2020-12-22 08:20:04,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69390 to 64196. [2020-12-22 08:20:04,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64196 states. [2020-12-22 08:20:04,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64196 states to 64196 states and 88097 transitions. [2020-12-22 08:20:04,181 INFO L78 Accepts]: Start accepts. Automaton has 64196 states and 88097 transitions. Word has length 62 [2020-12-22 08:20:04,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:04,181 INFO L481 AbstractCegarLoop]: Abstraction has 64196 states and 88097 transitions. [2020-12-22 08:20:04,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:20:04,182 INFO L276 IsEmpty]: Start isEmpty. Operand 64196 states and 88097 transitions. [2020-12-22 08:20:04,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:20:04,188 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:04,188 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:20:04,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:20:04,188 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:04,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:04,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1807529145, now seen corresponding path program 1 times [2020-12-22 08:20:04,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:04,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227721288] [2020-12-22 08:20:04,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:04,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:20:04,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227721288] [2020-12-22 08:20:04,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:04,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:20:04,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275996677] [2020-12-22 08:20:04,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:20:04,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:04,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:20:04,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:20:04,232 INFO L87 Difference]: Start difference. First operand 64196 states and 88097 transitions. Second operand 3 states. [2020-12-22 08:20:10,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:10,520 INFO L93 Difference]: Finished difference Result 141599 states and 193891 transitions. [2020-12-22 08:20:10,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:20:10,521 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 08:20:10,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:10,772 INFO L225 Difference]: With dead ends: 141599 [2020-12-22 08:20:10,773 INFO L226 Difference]: Without dead ends: 84266 [2020-12-22 08:20:10,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:20:10,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84266 states. [2020-12-22 08:20:16,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84266 to 80711. [2020-12-22 08:20:16,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80711 states. [2020-12-22 08:20:16,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80711 states to 80711 states and 109057 transitions. [2020-12-22 08:20:16,884 INFO L78 Accepts]: Start accepts. Automaton has 80711 states and 109057 transitions. Word has length 65 [2020-12-22 08:20:16,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:16,884 INFO L481 AbstractCegarLoop]: Abstraction has 80711 states and 109057 transitions. [2020-12-22 08:20:16,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:20:16,885 INFO L276 IsEmpty]: Start isEmpty. Operand 80711 states and 109057 transitions. [2020-12-22 08:20:16,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:20:16,893 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:16,893 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:20:16,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:20:16,894 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:16,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:16,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1698199029, now seen corresponding path program 1 times [2020-12-22 08:20:16,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:16,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44689115] [2020-12-22 08:20:16,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:16,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:16,977 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:20:16,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44689115] [2020-12-22 08:20:16,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291127335] [2020-12-22 08:20:16,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 08:20:17,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:17,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 08:20:17,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:20:17,272 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:20:17,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:20:17,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-22 08:20:17,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627007547] [2020-12-22 08:20:17,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 08:20:17,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:17,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 08:20:17,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-22 08:20:17,274 INFO L87 Difference]: Start difference. First operand 80711 states and 109057 transitions. Second operand 11 states. [2020-12-22 08:20:32,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:32,032 INFO L93 Difference]: Finished difference Result 229924 states and 310323 transitions. [2020-12-22 08:20:32,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:20:32,032 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-12-22 08:20:32,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:32,326 INFO L225 Difference]: With dead ends: 229924 [2020-12-22 08:20:32,326 INFO L226 Difference]: Without dead ends: 170875 [2020-12-22 08:20:32,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-12-22 08:20:32,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170875 states. [2020-12-22 08:20:41,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170875 to 93967. [2020-12-22 08:20:41,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93967 states. [2020-12-22 08:20:41,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93967 states to 93967 states and 127026 transitions. [2020-12-22 08:20:41,212 INFO L78 Accepts]: Start accepts. Automaton has 93967 states and 127026 transitions. Word has length 67 [2020-12-22 08:20:41,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:41,212 INFO L481 AbstractCegarLoop]: Abstraction has 93967 states and 127026 transitions. [2020-12-22 08:20:41,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 08:20:41,212 INFO L276 IsEmpty]: Start isEmpty. Operand 93967 states and 127026 transitions. [2020-12-22 08:20:41,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:20:41,219 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:41,219 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:20:41,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 08:20:41,434 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:41,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:41,435 INFO L82 PathProgramCache]: Analyzing trace with hash -929496895, now seen corresponding path program 1 times [2020-12-22 08:20:41,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:41,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398511464] [2020-12-22 08:20:41,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:41,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:41,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:20:41,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398511464] [2020-12-22 08:20:41,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811996572] [2020-12-22 08:20:41,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 08:20:41,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:41,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 08:20:41,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:20:41,784 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:20:41,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:20:41,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-22 08:20:41,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497163144] [2020-12-22 08:20:41,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 08:20:41,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:41,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 08:20:41,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-22 08:20:41,787 INFO L87 Difference]: Start difference. First operand 93967 states and 127026 transitions. Second operand 11 states. [2020-12-22 08:20:54,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:54,192 INFO L93 Difference]: Finished difference Result 193539 states and 259994 transitions. [2020-12-22 08:20:54,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:20:54,193 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-12-22 08:20:54,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:54,567 INFO L225 Difference]: With dead ends: 193539 [2020-12-22 08:20:54,568 INFO L226 Difference]: Without dead ends: 123755 [2020-12-22 08:20:54,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-12-22 08:20:54,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123755 states. [2020-12-22 08:21:03,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123755 to 93849. [2020-12-22 08:21:03,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93849 states. [2020-12-22 08:21:03,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93849 states to 93849 states and 126196 transitions. [2020-12-22 08:21:03,824 INFO L78 Accepts]: Start accepts. Automaton has 93849 states and 126196 transitions. Word has length 67 [2020-12-22 08:21:03,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:03,825 INFO L481 AbstractCegarLoop]: Abstraction has 93849 states and 126196 transitions. [2020-12-22 08:21:03,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 08:21:03,825 INFO L276 IsEmpty]: Start isEmpty. Operand 93849 states and 126196 transitions. [2020-12-22 08:21:03,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:21:03,832 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:03,833 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:21:04,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 08:21:04,046 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:04,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:04,047 INFO L82 PathProgramCache]: Analyzing trace with hash -2073252700, now seen corresponding path program 1 times [2020-12-22 08:21:04,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:04,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676737327] [2020-12-22 08:21:04,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:04,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:04,387 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:21:04,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676737327] [2020-12-22 08:21:04,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768361550] [2020-12-22 08:21:04,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 08:21:04,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:04,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 08:21:04,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:21:04,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:21:04,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:21:04,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-22 08:21:04,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721317497] [2020-12-22 08:21:04,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 08:21:04,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:04,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 08:21:04,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-22 08:21:04,672 INFO L87 Difference]: Start difference. First operand 93849 states and 126196 transitions. Second operand 11 states. [2020-12-22 08:21:21,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:21,593 INFO L93 Difference]: Finished difference Result 212699 states and 284363 transitions. [2020-12-22 08:21:21,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:21:21,593 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-12-22 08:21:21,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:21,846 INFO L225 Difference]: With dead ends: 212699 [2020-12-22 08:21:21,847 INFO L226 Difference]: Without dead ends: 156545 [2020-12-22 08:21:22,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-12-22 08:21:22,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156545 states.