/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.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:35:27,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:35:27,907 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:35:27,963 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:35:27,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:35:27,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:35:27,971 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:35:27,978 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:35:27,982 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:35:27,987 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:35:27,989 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:35:27,990 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:35:27,991 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:35:27,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:35:27,993 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:35:27,995 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:35:28,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:35:28,014 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:35:28,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:35:28,026 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:35:28,029 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:35:28,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:35:28,033 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:35:28,035 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:35:28,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:35:28,051 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:35:28,052 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:35:28,054 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:35:28,055 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:35:28,056 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:35:28,056 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:35:28,057 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:35:28,057 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:35:28,057 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:35:28,058 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:35:28,059 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:35:28,060 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:35:28,112 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:35:28,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:35:28,117 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:35:28,118 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:35:28,118 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:35:28,118 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:35:28,119 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:35:28,119 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:35:28,119 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:35:28,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:35:28,121 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:35:28,121 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:35:28,121 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:35:28,121 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:35:28,122 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:35:28,122 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:35:28,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:35:28,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:35:28,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:35:28,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:35:28,123 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:35:28,124 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:35:28,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:35:28,124 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:35:28,124 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:35:28,124 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:35:28,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:35:28,553 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:35:28,556 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:35:28,558 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:35:28,559 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:35:28,560 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 08:35:28,648 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43f69e4b2/95e8dbc9449447de9fa8f1b19a249603/FLAG7cf576b4d [2020-12-22 08:35:29,374 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:35:29,374 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 08:35:29,390 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43f69e4b2/95e8dbc9449447de9fa8f1b19a249603/FLAG7cf576b4d [2020-12-22 08:35:29,675 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43f69e4b2/95e8dbc9449447de9fa8f1b19a249603 [2020-12-22 08:35:29,680 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:35:29,682 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:35:29,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:35:29,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:35:29,690 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:35:29,692 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:35:29" (1/1) ... [2020-12-22 08:35:29,694 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35edcd8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:29, skipping insertion in model container [2020-12-22 08:35:29,694 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:35:29" (1/1) ... [2020-12-22 08:35:29,702 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:35:29,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:35:29,970 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.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[3665,3678] [2020-12-22 08:35:30,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:35:30,040 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:35:30,097 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.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[3665,3678] [2020-12-22 08:35:30,109 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:35:30,132 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:35:30,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:30 WrapperNode [2020-12-22 08:35:30,133 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:35:30,134 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:35:30,134 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:35:30,135 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:35:30,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:30" (1/1) ... [2020-12-22 08:35:30,158 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:30" (1/1) ... [2020-12-22 08:35:30,190 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:35:30,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:35:30,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:35:30,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:35:30,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:30" (1/1) ... [2020-12-22 08:35:30,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:30" (1/1) ... [2020-12-22 08:35:30,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:30" (1/1) ... [2020-12-22 08:35:30,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:30" (1/1) ... [2020-12-22 08:35:30,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:30" (1/1) ... [2020-12-22 08:35:30,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:30" (1/1) ... [2020-12-22 08:35:30,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:30" (1/1) ... [2020-12-22 08:35:30,225 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:35:30,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:35:30,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:35:30,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:35:30,228 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:30" (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 08:35:30,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:35:30,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:35:30,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:35:30,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:35:31,131 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:35:31,132 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:35:31,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:35:31 BoogieIcfgContainer [2020-12-22 08:35:31,134 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:35:31,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:35:31,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:35:31,141 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:35:31,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:35:29" (1/3) ... [2020-12-22 08:35:31,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@97189ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:35:31, skipping insertion in model container [2020-12-22 08:35:31,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:30" (2/3) ... [2020-12-22 08:35:31,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@97189ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:35:31, skipping insertion in model container [2020-12-22 08:35:31,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:35:31" (3/3) ... [2020-12-22 08:35:31,145 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 08:35:31,153 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:35:31,159 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:35:31,180 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:35:31,211 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:35:31,211 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:35:31,212 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:35:31,212 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:35:31,212 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:35:31,212 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:35:31,212 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:35:31,212 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:35:31,230 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2020-12-22 08:35:31,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 08:35:31,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:35:31,239 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] [2020-12-22 08:35:31,240 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:35:31,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:35:31,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1007825277, now seen corresponding path program 1 times [2020-12-22 08:35:31,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:35:31,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006289492] [2020-12-22 08:35:31,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:35:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:35:31,568 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 08:35:31,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006289492] [2020-12-22 08:35:31,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:35:31,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:35:31,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113171125] [2020-12-22 08:35:31,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:35:31,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:35:31,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:35:31,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:35:31,603 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 3 states. [2020-12-22 08:35:31,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:35:31,695 INFO L93 Difference]: Finished difference Result 140 states and 224 transitions. [2020-12-22 08:35:31,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:35:31,697 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2020-12-22 08:35:31,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:35:31,710 INFO L225 Difference]: With dead ends: 140 [2020-12-22 08:35:31,710 INFO L226 Difference]: Without dead ends: 91 [2020-12-22 08:35:31,714 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 08:35:31,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-22 08:35:31,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2020-12-22 08:35:31,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-22 08:35:31,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 130 transitions. [2020-12-22 08:35:31,770 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 130 transitions. Word has length 36 [2020-12-22 08:35:31,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:35:31,771 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 130 transitions. [2020-12-22 08:35:31,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:35:31,772 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 130 transitions. [2020-12-22 08:35:31,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 08:35:31,774 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:35:31,775 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 08:35:31,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:35:31,776 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:35:31,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:35:31,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1176817218, now seen corresponding path program 1 times [2020-12-22 08:35:31,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:35:31,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828743582] [2020-12-22 08:35:31,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:35:31,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:35:32,009 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 08:35:32,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828743582] [2020-12-22 08:35:32,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:35:32,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:35:32,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683642203] [2020-12-22 08:35:32,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:35:32,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:35:32,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:35:32,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:35:32,022 INFO L87 Difference]: Start difference. First operand 89 states and 130 transitions. Second operand 3 states. [2020-12-22 08:35:32,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:35:32,108 INFO L93 Difference]: Finished difference Result 213 states and 326 transitions. [2020-12-22 08:35:32,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:35:32,109 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-12-22 08:35:32,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:35:32,112 INFO L225 Difference]: With dead ends: 213 [2020-12-22 08:35:32,113 INFO L226 Difference]: Without dead ends: 143 [2020-12-22 08:35:32,114 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 08:35:32,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-12-22 08:35:32,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2020-12-22 08:35:32,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-22 08:35:32,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 212 transitions. [2020-12-22 08:35:32,144 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 212 transitions. Word has length 37 [2020-12-22 08:35:32,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:35:32,145 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 212 transitions. [2020-12-22 08:35:32,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:35:32,145 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 212 transitions. [2020-12-22 08:35:32,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 08:35:32,147 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:35:32,147 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 08:35:32,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:35:32,148 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:35:32,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:35:32,148 INFO L82 PathProgramCache]: Analyzing trace with hash 761408425, now seen corresponding path program 1 times [2020-12-22 08:35:32,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:35:32,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361507960] [2020-12-22 08:35:32,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:35:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:35:32,242 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 08:35:32,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361507960] [2020-12-22 08:35:32,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:35:32,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:35:32,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2367976] [2020-12-22 08:35:32,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:35:32,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:35:32,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:35:32,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:35:32,246 INFO L87 Difference]: Start difference. First operand 141 states and 212 transitions. Second operand 3 states. [2020-12-22 08:35:32,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:35:32,301 INFO L93 Difference]: Finished difference Result 353 states and 546 transitions. [2020-12-22 08:35:32,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:35:32,302 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-12-22 08:35:32,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:35:32,306 INFO L225 Difference]: With dead ends: 353 [2020-12-22 08:35:32,306 INFO L226 Difference]: Without dead ends: 231 [2020-12-22 08:35:32,307 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 08:35:32,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-12-22 08:35:32,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 229. [2020-12-22 08:35:32,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-12-22 08:35:32,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 348 transitions. [2020-12-22 08:35:32,372 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 348 transitions. Word has length 38 [2020-12-22 08:35:32,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:35:32,372 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 348 transitions. [2020-12-22 08:35:32,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:35:32,372 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 348 transitions. [2020-12-22 08:35:32,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 08:35:32,379 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:35:32,379 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 08:35:32,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:35:32,380 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:35:32,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:35:32,381 INFO L82 PathProgramCache]: Analyzing trace with hash 2014631486, now seen corresponding path program 1 times [2020-12-22 08:35:32,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:35:32,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618094890] [2020-12-22 08:35:32,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:35:32,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:35:32,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:35:32,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618094890] [2020-12-22 08:35:32,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:35:32,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:35:32,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204913907] [2020-12-22 08:35:32,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:35:32,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:35:32,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:35:32,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:35:32,611 INFO L87 Difference]: Start difference. First operand 229 states and 348 transitions. Second operand 5 states. [2020-12-22 08:35:32,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:35:32,783 INFO L93 Difference]: Finished difference Result 439 states and 677 transitions. [2020-12-22 08:35:32,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:35:32,786 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-12-22 08:35:32,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:35:32,791 INFO L225 Difference]: With dead ends: 439 [2020-12-22 08:35:32,792 INFO L226 Difference]: Without dead ends: 229 [2020-12-22 08:35:32,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:35:32,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-12-22 08:35:32,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2020-12-22 08:35:32,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-12-22 08:35:32,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 344 transitions. [2020-12-22 08:35:32,864 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 344 transitions. Word has length 39 [2020-12-22 08:35:32,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:35:32,864 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 344 transitions. [2020-12-22 08:35:32,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:35:32,864 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 344 transitions. [2020-12-22 08:35:32,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 08:35:32,866 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:35:32,866 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 08:35:32,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:35:32,868 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:35:32,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:35:32,870 INFO L82 PathProgramCache]: Analyzing trace with hash 172600953, now seen corresponding path program 1 times [2020-12-22 08:35:32,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:35:32,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306663993] [2020-12-22 08:35:32,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:35:32,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:35:33,057 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 08:35:33,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306663993] [2020-12-22 08:35:33,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:35:33,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:35:33,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484435454] [2020-12-22 08:35:33,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:35:33,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:35:33,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:35:33,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:35:33,061 INFO L87 Difference]: Start difference. First operand 229 states and 344 transitions. Second operand 5 states. [2020-12-22 08:35:33,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:35:33,247 INFO L93 Difference]: Finished difference Result 1069 states and 1644 transitions. [2020-12-22 08:35:33,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:35:33,249 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-12-22 08:35:33,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:35:33,255 INFO L225 Difference]: With dead ends: 1069 [2020-12-22 08:35:33,256 INFO L226 Difference]: Without dead ends: 859 [2020-12-22 08:35:33,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 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 08:35:33,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2020-12-22 08:35:33,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 437. [2020-12-22 08:35:33,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2020-12-22 08:35:33,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 652 transitions. [2020-12-22 08:35:33,318 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 652 transitions. Word has length 39 [2020-12-22 08:35:33,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:35:33,319 INFO L481 AbstractCegarLoop]: Abstraction has 437 states and 652 transitions. [2020-12-22 08:35:33,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:35:33,319 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 652 transitions. [2020-12-22 08:35:33,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 08:35:33,320 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:35:33,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:35:33,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:35:33,321 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:35:33,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:35:33,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1738935381, now seen corresponding path program 1 times [2020-12-22 08:35:33,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:35:33,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492173360] [2020-12-22 08:35:33,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:35:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:35:33,427 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 08:35:33,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492173360] [2020-12-22 08:35:33,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:35:33,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:35:33,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950449405] [2020-12-22 08:35:33,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:35:33,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:35:33,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:35:33,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:35:33,431 INFO L87 Difference]: Start difference. First operand 437 states and 652 transitions. Second operand 3 states. [2020-12-22 08:35:33,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:35:33,527 INFO L93 Difference]: Finished difference Result 1055 states and 1584 transitions. [2020-12-22 08:35:33,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:35:33,528 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 08:35:33,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:35:33,533 INFO L225 Difference]: With dead ends: 1055 [2020-12-22 08:35:33,533 INFO L226 Difference]: Without dead ends: 637 [2020-12-22 08:35:33,534 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 08:35:33,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2020-12-22 08:35:33,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 635. [2020-12-22 08:35:33,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2020-12-22 08:35:33,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 938 transitions. [2020-12-22 08:35:33,602 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 938 transitions. Word has length 41 [2020-12-22 08:35:33,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:35:33,602 INFO L481 AbstractCegarLoop]: Abstraction has 635 states and 938 transitions. [2020-12-22 08:35:33,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:35:33,602 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 938 transitions. [2020-12-22 08:35:33,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 08:35:33,603 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:35:33,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:35:33,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:35:33,604 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:35:33,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:35:33,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1759938036, now seen corresponding path program 1 times [2020-12-22 08:35:33,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:35:33,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556811734] [2020-12-22 08:35:33,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:35:33,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:35:33,769 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 08:35:33,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556811734] [2020-12-22 08:35:33,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:35:33,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:35:33,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785969229] [2020-12-22 08:35:33,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:35:33,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:35:33,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:35:33,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:35:33,772 INFO L87 Difference]: Start difference. First operand 635 states and 938 transitions. Second operand 5 states. [2020-12-22 08:35:33,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:35:33,991 INFO L93 Difference]: Finished difference Result 1767 states and 2648 transitions. [2020-12-22 08:35:33,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:35:33,992 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-12-22 08:35:33,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:35:33,999 INFO L225 Difference]: With dead ends: 1767 [2020-12-22 08:35:33,999 INFO L226 Difference]: Without dead ends: 1153 [2020-12-22 08:35:34,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 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 08:35:34,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2020-12-22 08:35:34,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 635. [2020-12-22 08:35:34,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2020-12-22 08:35:34,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 926 transitions. [2020-12-22 08:35:34,092 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 926 transitions. Word has length 41 [2020-12-22 08:35:34,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:35:34,093 INFO L481 AbstractCegarLoop]: Abstraction has 635 states and 926 transitions. [2020-12-22 08:35:34,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:35:34,093 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 926 transitions. [2020-12-22 08:35:34,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 08:35:34,099 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:35:34,099 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 08:35:34,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:35:34,100 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:35:34,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:35:34,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1278405158, now seen corresponding path program 1 times [2020-12-22 08:35:34,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:35:34,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081061021] [2020-12-22 08:35:34,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:35:34,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:35:34,231 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 08:35:34,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081061021] [2020-12-22 08:35:34,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:35:34,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:35:34,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387867395] [2020-12-22 08:35:34,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:35:34,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:35:34,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:35:34,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:35:34,234 INFO L87 Difference]: Start difference. First operand 635 states and 926 transitions. Second operand 5 states. [2020-12-22 08:35:34,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:35:34,426 INFO L93 Difference]: Finished difference Result 1143 states and 1658 transitions. [2020-12-22 08:35:34,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:35:34,427 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 08:35:34,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:35:34,435 INFO L225 Difference]: With dead ends: 1143 [2020-12-22 08:35:34,435 INFO L226 Difference]: Without dead ends: 1141 [2020-12-22 08:35:34,436 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 08:35:34,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2020-12-22 08:35:34,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 667. [2020-12-22 08:35:34,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 667 states. [2020-12-22 08:35:34,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 954 transitions. [2020-12-22 08:35:34,526 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 954 transitions. Word has length 42 [2020-12-22 08:35:34,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:35:34,528 INFO L481 AbstractCegarLoop]: Abstraction has 667 states and 954 transitions. [2020-12-22 08:35:34,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:35:34,528 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 954 transitions. [2020-12-22 08:35:34,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 08:35:34,530 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:35:34,530 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] [2020-12-22 08:35:34,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:35:34,531 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:35:34,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:35:34,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1616122195, now seen corresponding path program 1 times [2020-12-22 08:35:34,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:35:34,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557583338] [2020-12-22 08:35:34,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:35:34,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:35:34,711 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 08:35:34,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557583338] [2020-12-22 08:35:34,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:35:34,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:35:34,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315979279] [2020-12-22 08:35:34,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:35:34,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:35:34,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:35:34,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:35:34,714 INFO L87 Difference]: Start difference. First operand 667 states and 954 transitions. Second operand 5 states. [2020-12-22 08:35:35,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:35:35,036 INFO L93 Difference]: Finished difference Result 2735 states and 3928 transitions. [2020-12-22 08:35:35,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:35:35,037 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2020-12-22 08:35:35,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:35:35,049 INFO L225 Difference]: With dead ends: 2735 [2020-12-22 08:35:35,049 INFO L226 Difference]: Without dead ends: 2089 [2020-12-22 08:35:35,051 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 08:35:35,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2020-12-22 08:35:35,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1311. [2020-12-22 08:35:35,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1311 states. [2020-12-22 08:35:35,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 1874 transitions. [2020-12-22 08:35:35,228 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 1874 transitions. Word has length 60 [2020-12-22 08:35:35,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:35:35,229 INFO L481 AbstractCegarLoop]: Abstraction has 1311 states and 1874 transitions. [2020-12-22 08:35:35,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:35:35,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 1874 transitions. [2020-12-22 08:35:35,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 08:35:35,230 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:35:35,230 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] [2020-12-22 08:35:35,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:35:35,231 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:35:35,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:35:35,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1524898995, now seen corresponding path program 1 times [2020-12-22 08:35:35,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:35:35,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981748659] [2020-12-22 08:35:35,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:35:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:35:35,326 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 08:35:35,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981748659] [2020-12-22 08:35:35,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:35:35,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:35:35,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794507222] [2020-12-22 08:35:35,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:35:35,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:35:35,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:35:35,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:35:35,328 INFO L87 Difference]: Start difference. First operand 1311 states and 1874 transitions. Second operand 5 states. [2020-12-22 08:35:35,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:35:35,728 INFO L93 Difference]: Finished difference Result 3379 states and 4848 transitions. [2020-12-22 08:35:35,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:35:35,730 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2020-12-22 08:35:35,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:35:35,748 INFO L225 Difference]: With dead ends: 3379 [2020-12-22 08:35:35,748 INFO L226 Difference]: Without dead ends: 2733 [2020-12-22 08:35:35,751 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 08:35:35,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2020-12-22 08:35:35,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 2279. [2020-12-22 08:35:35,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2279 states. [2020-12-22 08:35:36,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2279 states to 2279 states and 3244 transitions. [2020-12-22 08:35:36,007 INFO L78 Accepts]: Start accepts. Automaton has 2279 states and 3244 transitions. Word has length 60 [2020-12-22 08:35:36,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:35:36,008 INFO L481 AbstractCegarLoop]: Abstraction has 2279 states and 3244 transitions. [2020-12-22 08:35:36,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:35:36,008 INFO L276 IsEmpty]: Start isEmpty. Operand 2279 states and 3244 transitions. [2020-12-22 08:35:36,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 08:35:36,028 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:35:36,028 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] [2020-12-22 08:35:36,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:35:36,029 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:35:36,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:35:36,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1912167623, now seen corresponding path program 1 times [2020-12-22 08:35:36,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:35:36,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678129932] [2020-12-22 08:35:36,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:35:36,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:35:36,147 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 08:35:36,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678129932] [2020-12-22 08:35:36,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:35:36,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:35:36,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219549131] [2020-12-22 08:35:36,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:35:36,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:35:36,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:35:36,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:35:36,150 INFO L87 Difference]: Start difference. First operand 2279 states and 3244 transitions. Second operand 5 states. [2020-12-22 08:35:36,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:35:36,616 INFO L93 Difference]: Finished difference Result 3827 states and 5492 transitions. [2020-12-22 08:35:36,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:35:36,617 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2020-12-22 08:35:36,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:35:36,634 INFO L225 Difference]: With dead ends: 3827 [2020-12-22 08:35:36,635 INFO L226 Difference]: Without dead ends: 3377 [2020-12-22 08:35:36,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 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 08:35:36,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3377 states. [2020-12-22 08:35:36,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3377 to 2727. [2020-12-22 08:35:36,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2727 states. [2020-12-22 08:35:36,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 3892 transitions. [2020-12-22 08:35:36,996 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 3892 transitions. Word has length 60 [2020-12-22 08:35:36,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:35:36,996 INFO L481 AbstractCegarLoop]: Abstraction has 2727 states and 3892 transitions. [2020-12-22 08:35:36,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:35:36,997 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 3892 transitions. [2020-12-22 08:35:36,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 08:35:36,999 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:35:36,999 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 08:35:36,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:35:36,999 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:35:37,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:35:37,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1791952020, now seen corresponding path program 1 times [2020-12-22 08:35:37,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:35:37,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124613884] [2020-12-22 08:35:37,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:35:37,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:35:37,147 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 08:35:37,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124613884] [2020-12-22 08:35:37,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930929535] [2020-12-22 08:35:37,148 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 08:35:37,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:35:37,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 08:35:37,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:35:37,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 08:35:37,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:35:37,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2020-12-22 08:35:37,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538317737] [2020-12-22 08:35:37,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:35:37,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:35:37,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:35:37,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:35:37,523 INFO L87 Difference]: Start difference. First operand 2727 states and 3892 transitions. Second operand 6 states. [2020-12-22 08:35:38,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:35:38,324 INFO L93 Difference]: Finished difference Result 6480 states and 9305 transitions. [2020-12-22 08:35:38,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:35:38,325 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-12-22 08:35:38,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:35:38,346 INFO L225 Difference]: With dead ends: 6480 [2020-12-22 08:35:38,346 INFO L226 Difference]: Without dead ends: 4462 [2020-12-22 08:35:38,351 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 08:35:38,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4462 states. [2020-12-22 08:35:38,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4462 to 4403. [2020-12-22 08:35:38,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4403 states. [2020-12-22 08:35:38,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4403 states to 4403 states and 6206 transitions. [2020-12-22 08:35:38,943 INFO L78 Accepts]: Start accepts. Automaton has 4403 states and 6206 transitions. Word has length 61 [2020-12-22 08:35:38,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:35:38,944 INFO L481 AbstractCegarLoop]: Abstraction has 4403 states and 6206 transitions. [2020-12-22 08:35:38,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:35:38,944 INFO L276 IsEmpty]: Start isEmpty. Operand 4403 states and 6206 transitions. [2020-12-22 08:35:38,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:35:38,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:35:38,946 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:35:39,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 08:35:39,162 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:35:39,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:35:39,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1709414990, now seen corresponding path program 1 times [2020-12-22 08:35:39,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:35:39,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113361893] [2020-12-22 08:35:39,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:35:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:35:39,433 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:35:39,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113361893] [2020-12-22 08:35:39,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73087543] [2020-12-22 08:35:39,434 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 08:35:39,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:35:39,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 08:35:39,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:35:40,234 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 08:35:40,500 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2020-12-22 08:35:41,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:35:41,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:35:41,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 16] total 23 [2020-12-22 08:35:41,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959770806] [2020-12-22 08:35:41,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 08:35:41,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:35:41,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 08:35:41,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2020-12-22 08:35:41,066 INFO L87 Difference]: Start difference. First operand 4403 states and 6206 transitions. Second operand 24 states. [2020-12-22 08:35:42,113 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-12-22 08:35:42,508 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-12-22 08:35:42,867 WARN L197 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-12-22 08:35:43,276 WARN L197 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-12-22 08:35:44,020 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-12-22 08:35:44,339 WARN L197 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-12-22 08:35:44,867 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-12-22 08:35:45,170 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-12-22 08:35:46,055 WARN L197 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 89 [2020-12-22 08:35:46,421 WARN L197 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 89 [2020-12-22 08:35:46,835 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-12-22 08:35:47,156 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-12-22 08:35:47,552 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-12-22 08:35:47,917 WARN L197 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2020-12-22 08:35:48,220 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-12-22 08:35:48,616 WARN L197 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2020-12-22 08:35:49,166 WARN L197 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2020-12-22 08:35:49,503 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2020-12-22 08:35:49,915 WARN L197 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2020-12-22 08:35:50,256 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2020-12-22 08:35:50,447 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-12-22 08:35:50,801 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-12-22 08:35:51,392 WARN L197 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-12-22 08:35:51,816 WARN L197 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2020-12-22 08:35:52,195 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-12-22 08:35:52,422 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 08:35:52,718 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-12-22 08:35:52,908 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-12-22 08:35:53,256 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-12-22 08:35:53,722 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-12-22 08:35:54,105 WARN L197 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2020-12-22 08:35:54,303 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 08:35:54,580 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-12-22 08:35:54,944 WARN L197 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-12-22 08:35:55,337 WARN L197 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2020-12-22 08:35:56,203 WARN L197 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-12-22 08:35:56,808 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-12-22 08:35:57,134 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-12-22 08:35:57,299 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-12-22 08:35:57,604 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-12-22 08:35:57,786 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-12-22 08:35:58,402 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-22 08:35:58,685 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-22 08:35:59,152 WARN L197 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-12-22 08:36:00,340 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-12-22 08:36:00,551 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-12-22 08:36:01,611 WARN L197 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 87 [2020-12-22 08:36:02,205 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-12-22 08:36:02,334 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-22 08:36:02,860 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-12-22 08:36:03,182 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-12-22 08:36:03,630 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-22 08:36:04,036 WARN L197 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 90 [2020-12-22 08:36:04,464 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-12-22 08:36:04,729 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-12-22 08:36:05,266 WARN L197 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-12-22 08:36:06,201 WARN L197 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-12-22 08:36:07,282 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-12-22 08:36:07,642 WARN L197 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-12-22 08:36:09,076 WARN L197 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 87 [2020-12-22 08:36:09,950 WARN L197 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 90 [2020-12-22 08:36:10,578 WARN L197 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-12-22 08:36:11,190 WARN L197 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-12-22 08:36:14,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:14,196 INFO L93 Difference]: Finished difference Result 56035 states and 77450 transitions. [2020-12-22 08:36:14,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 08:36:14,197 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 62 [2020-12-22 08:36:14,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:14,351 INFO L225 Difference]: With dead ends: 56035 [2020-12-22 08:36:14,351 INFO L226 Difference]: Without dead ends: 51653 [2020-12-22 08:36:14,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6908 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=3258, Invalid=14832, Unknown=0, NotChecked=0, Total=18090 [2020-12-22 08:36:14,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51653 states. [2020-12-22 08:36:16,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51653 to 9355. [2020-12-22 08:36:16,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9355 states. [2020-12-22 08:36:16,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9355 states to 9355 states and 13032 transitions. [2020-12-22 08:36:16,800 INFO L78 Accepts]: Start accepts. Automaton has 9355 states and 13032 transitions. Word has length 62 [2020-12-22 08:36:16,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:36:16,800 INFO L481 AbstractCegarLoop]: Abstraction has 9355 states and 13032 transitions. [2020-12-22 08:36:16,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 08:36:16,801 INFO L276 IsEmpty]: Start isEmpty. Operand 9355 states and 13032 transitions. [2020-12-22 08:36:16,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:36:16,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:16,802 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 08:36:17,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 08:36:17,017 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:17,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:17,019 INFO L82 PathProgramCache]: Analyzing trace with hash 653717303, now seen corresponding path program 1 times [2020-12-22 08:36:17,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:17,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372304546] [2020-12-22 08:36:17,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:17,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:17,231 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 08:36:17,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372304546] [2020-12-22 08:36:17,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004758249] [2020-12-22 08:36:17,232 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 08:36:17,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:17,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 08:36:17,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:36:17,528 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 08:36:17,829 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-12-22 08:36:18,023 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 08:36:18,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:36:18,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 08:36:18,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361059023] [2020-12-22 08:36:18,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 08:36:18,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:18,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 08:36:18,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-12-22 08:36:18,025 INFO L87 Difference]: Start difference. First operand 9355 states and 13032 transitions. Second operand 17 states. [2020-12-22 08:36:32,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:32,021 INFO L93 Difference]: Finished difference Result 68149 states and 93592 transitions. [2020-12-22 08:36:32,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-22 08:36:32,022 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2020-12-22 08:36:32,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:32,215 INFO L225 Difference]: With dead ends: 68149 [2020-12-22 08:36:32,215 INFO L226 Difference]: Without dead ends: 58815 [2020-12-22 08:36:32,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=749, Invalid=2331, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 08:36:32,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58815 states. [2020-12-22 08:36:36,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58815 to 20943. [2020-12-22 08:36:36,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20943 states. [2020-12-22 08:36:36,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20943 states to 20943 states and 28654 transitions. [2020-12-22 08:36:36,789 INFO L78 Accepts]: Start accepts. Automaton has 20943 states and 28654 transitions. Word has length 62 [2020-12-22 08:36:36,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:36:36,789 INFO L481 AbstractCegarLoop]: Abstraction has 20943 states and 28654 transitions. [2020-12-22 08:36:36,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 08:36:36,789 INFO L276 IsEmpty]: Start isEmpty. Operand 20943 states and 28654 transitions. [2020-12-22 08:36:36,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:36:36,790 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:36,791 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 08:36:36,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 08:36:36,999 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:36,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:37,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1807663409, now seen corresponding path program 1 times [2020-12-22 08:36:37,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:37,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631531391] [2020-12-22 08:36:37,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:37,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:37,204 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 08:36:37,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631531391] [2020-12-22 08:36:37,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970402182] [2020-12-22 08:36:37,205 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 08:36:37,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:37,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 08:36:37,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:36:37,488 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 08:36:37,726 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 08:36:37,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:36:37,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 08:36:37,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340677469] [2020-12-22 08:36:37,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 08:36:37,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:37,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 08:36:37,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-12-22 08:36:37,729 INFO L87 Difference]: Start difference. First operand 20943 states and 28654 transitions. Second operand 17 states. [2020-12-22 08:37:03,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:37:03,385 INFO L93 Difference]: Finished difference Result 135652 states and 182751 transitions. [2020-12-22 08:37:03,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 08:37:03,386 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2020-12-22 08:37:03,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:37:03,586 INFO L225 Difference]: With dead ends: 135652 [2020-12-22 08:37:03,587 INFO L226 Difference]: Without dead ends: 114730 [2020-12-22 08:37:03,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=667, Invalid=1985, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 08:37:03,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114730 states. [2020-12-22 08:37:14,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114730 to 52080. [2020-12-22 08:37:14,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52080 states. [2020-12-22 08:37:14,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52080 states to 52080 states and 70921 transitions. [2020-12-22 08:37:14,615 INFO L78 Accepts]: Start accepts. Automaton has 52080 states and 70921 transitions. Word has length 62 [2020-12-22 08:37:14,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:37:14,615 INFO L481 AbstractCegarLoop]: Abstraction has 52080 states and 70921 transitions. [2020-12-22 08:37:14,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 08:37:14,615 INFO L276 IsEmpty]: Start isEmpty. Operand 52080 states and 70921 transitions. [2020-12-22 08:37:14,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:37:14,618 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:37:14,619 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:37:14,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 08:37:14,820 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:37:14,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:37:14,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1286750416, now seen corresponding path program 1 times [2020-12-22 08:37:14,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:37:14,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121118969] [2020-12-22 08:37:14,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:37:14,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:14,862 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 08:37:14,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121118969] [2020-12-22 08:37:14,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:37:14,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:37:14,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209405178] [2020-12-22 08:37:14,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:37:14,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:37:14,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:37:14,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:37:14,865 INFO L87 Difference]: Start difference. First operand 52080 states and 70921 transitions. Second operand 3 states. [2020-12-22 08:37:23,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:37:23,460 INFO L93 Difference]: Finished difference Result 94910 states and 129570 transitions. [2020-12-22 08:37:23,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:37:23,461 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 08:37:23,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:37:23,517 INFO L225 Difference]: With dead ends: 94910 [2020-12-22 08:37:23,517 INFO L226 Difference]: Without dead ends: 42851 [2020-12-22 08:37:23,568 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 08:37:23,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42851 states. [2020-12-22 08:37:32,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42851 to 42851. [2020-12-22 08:37:32,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42851 states. [2020-12-22 08:37:32,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42851 states to 42851 states and 57680 transitions. [2020-12-22 08:37:32,273 INFO L78 Accepts]: Start accepts. Automaton has 42851 states and 57680 transitions. Word has length 63 [2020-12-22 08:37:32,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:37:32,274 INFO L481 AbstractCegarLoop]: Abstraction has 42851 states and 57680 transitions. [2020-12-22 08:37:32,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:37:32,274 INFO L276 IsEmpty]: Start isEmpty. Operand 42851 states and 57680 transitions. [2020-12-22 08:37:32,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:37:32,276 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:37:32,276 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:37:32,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:37:32,276 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:37:32,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:37:32,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1825583548, now seen corresponding path program 1 times [2020-12-22 08:37:32,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:37:32,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611387623] [2020-12-22 08:37:32,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:37:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:32,322 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:37:32,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611387623] [2020-12-22 08:37:32,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:37:32,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:37:32,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255295439] [2020-12-22 08:37:32,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:37:32,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:37:32,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:37:32,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:37:32,327 INFO L87 Difference]: Start difference. First operand 42851 states and 57680 transitions. Second operand 3 states. [2020-12-22 08:37:37,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:37:37,587 INFO L93 Difference]: Finished difference Result 68494 states and 92602 transitions. [2020-12-22 08:37:37,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:37:37,588 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 08:37:37,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:37:37,627 INFO L225 Difference]: With dead ends: 68494 [2020-12-22 08:37:37,627 INFO L226 Difference]: Without dead ends: 25664 [2020-12-22 08:37:37,657 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 08:37:37,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25664 states. [2020-12-22 08:37:42,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25664 to 24542. [2020-12-22 08:37:42,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24542 states. [2020-12-22 08:37:42,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24542 states to 24542 states and 32973 transitions. [2020-12-22 08:37:42,802 INFO L78 Accepts]: Start accepts. Automaton has 24542 states and 32973 transitions. Word has length 63 [2020-12-22 08:37:42,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:37:42,802 INFO L481 AbstractCegarLoop]: Abstraction has 24542 states and 32973 transitions. [2020-12-22 08:37:42,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:37:42,802 INFO L276 IsEmpty]: Start isEmpty. Operand 24542 states and 32973 transitions. [2020-12-22 08:37:42,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:37:42,804 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:37:42,804 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:37:42,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:37:42,805 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:37:42,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:37:42,805 INFO L82 PathProgramCache]: Analyzing trace with hash 392958652, now seen corresponding path program 1 times [2020-12-22 08:37:42,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:37:42,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766304343] [2020-12-22 08:37:42,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:37:42,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:43,873 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 08:37:43,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766304343] [2020-12-22 08:37:43,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055374892] [2020-12-22 08:37:43,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 08:37:43,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:44,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 08:37:44,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:37:44,619 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 08:37:45,097 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 26 [2020-12-22 08:37:45,728 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 08:37:45,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:37:45,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13] total 34 [2020-12-22 08:37:45,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196722942] [2020-12-22 08:37:45,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 08:37:45,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:37:45,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 08:37:45,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1040, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 08:37:45,732 INFO L87 Difference]: Start difference. First operand 24542 states and 32973 transitions. Second operand 34 states. [2020-12-22 08:37:46,106 WARN L197 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2020-12-22 08:37:47,135 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2020-12-22 08:37:47,490 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-12-22 08:37:47,919 WARN L197 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-12-22 08:37:48,449 WARN L197 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2020-12-22 08:37:48,998 WARN L197 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-12-22 08:37:49,776 WARN L197 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 103 [2020-12-22 08:37:50,557 WARN L197 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 111 [2020-12-22 08:37:51,014 WARN L197 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2020-12-22 08:37:51,373 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-12-22 08:37:51,846 WARN L197 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2020-12-22 08:37:52,332 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2020-12-22 08:37:52,731 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-12-22 08:37:52,958 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 08:37:53,416 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-12-22 08:37:53,795 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-12-22 08:37:54,141 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 08:37:54,467 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 08:37:54,763 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-12-22 08:37:55,206 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-12-22 08:37:55,511 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-12-22 08:37:55,813 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-12-22 08:37:56,808 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-12-22 08:37:57,413 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-12-22 08:37:57,789 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2020-12-22 08:37:58,246 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2020-12-22 08:37:58,937 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2020-12-22 08:37:59,832 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2020-12-22 08:38:00,581 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-12-22 08:38:01,004 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2020-12-22 08:38:01,483 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-12-22 08:38:02,104 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-12-22 08:38:02,646 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-12-22 08:38:03,222 WARN L197 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2020-12-22 08:38:03,507 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-12-22 08:38:03,872 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-12-22 08:38:04,328 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-12-22 08:38:06,084 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-12-22 08:38:06,511 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-12-22 08:38:08,145 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-12-22 08:38:08,619 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-12-22 08:38:08,997 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-12-22 08:38:09,544 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-12-22 08:38:11,166 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-12-22 08:38:13,011 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-12-22 08:38:13,624 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2020-12-22 08:38:14,513 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-12-22 08:38:15,137 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-12-22 08:38:20,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:38:20,066 INFO L93 Difference]: Finished difference Result 56985 states and 76766 transitions. [2020-12-22 08:38:20,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-22 08:38:20,068 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 63 [2020-12-22 08:38:20,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:38:20,183 INFO L225 Difference]: With dead ends: 56985 [2020-12-22 08:38:20,184 INFO L226 Difference]: Without dead ends: 46917 [2020-12-22 08:38:20,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2203 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=1682, Invalid=7630, Unknown=0, NotChecked=0, Total=9312 [2020-12-22 08:38:20,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46917 states. [2020-12-22 08:38:27,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46917 to 24836. [2020-12-22 08:38:27,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24836 states. [2020-12-22 08:38:27,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24836 states to 24836 states and 33414 transitions. [2020-12-22 08:38:27,136 INFO L78 Accepts]: Start accepts. Automaton has 24836 states and 33414 transitions. Word has length 63 [2020-12-22 08:38:27,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:38:27,137 INFO L481 AbstractCegarLoop]: Abstraction has 24836 states and 33414 transitions. [2020-12-22 08:38:27,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 08:38:27,137 INFO L276 IsEmpty]: Start isEmpty. Operand 24836 states and 33414 transitions. [2020-12-22 08:38:27,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:38:27,138 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:38:27,138 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:38:27,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 08:38:27,339 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:38:27,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:38:27,340 INFO L82 PathProgramCache]: Analyzing trace with hash -196942823, now seen corresponding path program 1 times [2020-12-22 08:38:27,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:38:27,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687353430] [2020-12-22 08:38:27,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:38:27,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:38:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:38:27,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687353430] [2020-12-22 08:38:27,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:38:27,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:38:27,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265758351] [2020-12-22 08:38:27,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:38:27,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:38:27,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:38:27,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:38:27,397 INFO L87 Difference]: Start difference. First operand 24836 states and 33414 transitions. Second operand 3 states. [2020-12-22 08:38:30,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:38:30,843 INFO L93 Difference]: Finished difference Result 37014 states and 50040 transitions. [2020-12-22 08:38:30,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:38:30,845 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 08:38:30,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:38:30,869 INFO L225 Difference]: With dead ends: 37014 [2020-12-22 08:38:30,869 INFO L226 Difference]: Without dead ends: 14336 [2020-12-22 08:38:30,887 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 08:38:30,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14336 states. [2020-12-22 08:38:34,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14336 to 14334. [2020-12-22 08:38:34,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14334 states. [2020-12-22 08:38:34,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14334 states to 14334 states and 18872 transitions. [2020-12-22 08:38:34,634 INFO L78 Accepts]: Start accepts. Automaton has 14334 states and 18872 transitions. Word has length 63 [2020-12-22 08:38:34,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:38:34,635 INFO L481 AbstractCegarLoop]: Abstraction has 14334 states and 18872 transitions. [2020-12-22 08:38:34,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:38:34,635 INFO L276 IsEmpty]: Start isEmpty. Operand 14334 states and 18872 transitions. [2020-12-22 08:38:34,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:38:34,637 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:38:34,637 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:38:34,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 08:38:34,637 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:38:34,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:38:34,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1628783719, now seen corresponding path program 1 times [2020-12-22 08:38:34,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:38:34,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300705981] [2020-12-22 08:38:34,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:38:34,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:38:36,329 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 08:38:36,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300705981] [2020-12-22 08:38:36,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809439044] [2020-12-22 08:38:36,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 08:38:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:38:36,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 08:38:36,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:38:38,180 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 08:38:39,926 WARN L197 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 168 DAG size of output: 60 [2020-12-22 08:38:40,343 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-12-22 08:38:40,766 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-12-22 08:38:40,821 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-22 08:38:41,298 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-12-22 08:38:41,395 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-22 08:38:41,900 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-12-22 08:38:41,932 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-22 08:38:41,948 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 4 disjuncts [2020-12-22 08:38:41,955 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2020-12-22 08:38:41,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 08:38:41,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-12-22 08:38:41,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230329379] [2020-12-22 08:38:41,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 08:38:41,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:38:41,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 08:38:41,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1347, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 08:38:41,958 INFO L87 Difference]: Start difference. First operand 14334 states and 18872 transitions. Second operand 23 states. [2020-12-22 08:38:42,560 WARN L197 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2020-12-22 08:38:43,386 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 08:38:43,839 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 08:38:44,240 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-12-22 08:38:44,755 WARN L197 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2020-12-22 08:38:45,334 WARN L197 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2020-12-22 08:38:46,046 WARN L197 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 94 [2020-12-22 08:38:46,841 WARN L197 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2020-12-22 08:38:47,263 WARN L197 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 08:38:47,729 WARN L197 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 08:38:48,408 WARN L197 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 08:38:48,844 WARN L197 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-12-22 08:38:49,515 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-22 08:38:50,036 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-12-22 08:38:57,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:38:57,202 INFO L93 Difference]: Finished difference Result 17028 states and 22377 transitions. [2020-12-22 08:38:57,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 08:38:57,206 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 63 [2020-12-22 08:38:57,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:38:57,237 INFO L225 Difference]: With dead ends: 17028 [2020-12-22 08:38:57,238 INFO L226 Difference]: Without dead ends: 15642 [2020-12-22 08:38:57,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=414, Invalid=3008, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 08:38:57,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15642 states. [2020-12-22 08:39:01,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15642 to 14387. [2020-12-22 08:39:01,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14387 states. [2020-12-22 08:39:01,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14387 states to 14387 states and 18954 transitions. [2020-12-22 08:39:01,145 INFO L78 Accepts]: Start accepts. Automaton has 14387 states and 18954 transitions. Word has length 63 [2020-12-22 08:39:01,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:39:01,146 INFO L481 AbstractCegarLoop]: Abstraction has 14387 states and 18954 transitions. [2020-12-22 08:39:01,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 08:39:01,146 INFO L276 IsEmpty]: Start isEmpty. Operand 14387 states and 18954 transitions. [2020-12-22 08:39:01,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:39:01,147 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:39:01,148 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:39:01,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 08:39:01,356 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:39:01,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:39:01,357 INFO L82 PathProgramCache]: Analyzing trace with hash -145976969, now seen corresponding path program 1 times [2020-12-22 08:39:01,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:39:01,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45795591] [2020-12-22 08:39:01,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:39:01,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:39:01,411 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 08:39:01,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45795591] [2020-12-22 08:39:01,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:39:01,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:39:01,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895906302] [2020-12-22 08:39:01,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:39:01,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:39:01,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:39:01,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:39:01,414 INFO L87 Difference]: Start difference. First operand 14387 states and 18954 transitions. Second operand 3 states. [2020-12-22 08:39:04,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:39:04,027 INFO L93 Difference]: Finished difference Result 23539 states and 31091 transitions. [2020-12-22 08:39:04,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:39:04,029 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 08:39:04,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:39:04,046 INFO L225 Difference]: With dead ends: 23539 [2020-12-22 08:39:04,046 INFO L226 Difference]: Without dead ends: 9241 [2020-12-22 08:39:04,059 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 08:39:04,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9241 states. [2020-12-22 08:39:06,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9241 to 9241. [2020-12-22 08:39:06,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9241 states. [2020-12-22 08:39:06,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9241 states to 9241 states and 12074 transitions. [2020-12-22 08:39:06,580 INFO L78 Accepts]: Start accepts. Automaton has 9241 states and 12074 transitions. Word has length 63 [2020-12-22 08:39:06,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:39:06,581 INFO L481 AbstractCegarLoop]: Abstraction has 9241 states and 12074 transitions. [2020-12-22 08:39:06,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:39:06,581 INFO L276 IsEmpty]: Start isEmpty. Operand 9241 states and 12074 transitions. [2020-12-22 08:39:06,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:39:06,582 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:39:06,582 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:39:06,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 08:39:06,582 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:39:06,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:39:06,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1441254617, now seen corresponding path program 1 times [2020-12-22 08:39:06,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:39:06,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587172329] [2020-12-22 08:39:06,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:39:06,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:39:07,272 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2020-12-22 08:39:07,829 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-12-22 08:39:08,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:39:08,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587172329] [2020-12-22 08:39:08,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746720922] [2020-12-22 08:39:08,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 08:39:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:39:08,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 08:39:08,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:39:09,847 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 08:39:10,389 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 26 [2020-12-22 08:39:11,456 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:39:11,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:39:11,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13] total 33 [2020-12-22 08:39:11,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884531593] [2020-12-22 08:39:11,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 08:39:11,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:39:11,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 08:39:11,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=974, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 08:39:11,460 INFO L87 Difference]: Start difference. First operand 9241 states and 12074 transitions. Second operand 33 states. [2020-12-22 08:39:12,081 WARN L197 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2020-12-22 08:39:13,174 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2020-12-22 08:39:13,477 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2020-12-22 08:39:13,916 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2020-12-22 08:39:14,335 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2020-12-22 08:39:14,782 WARN L197 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2020-12-22 08:39:15,493 WARN L197 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-12-22 08:39:16,530 WARN L197 SmtUtils]: Spent 873.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 79 [2020-12-22 08:39:17,868 WARN L197 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 113 DAG size of output: 89 [2020-12-22 08:39:19,392 WARN L197 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 121 DAG size of output: 95 [2020-12-22 08:39:20,146 WARN L197 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2020-12-22 08:39:20,698 WARN L197 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-12-22 08:39:21,493 WARN L197 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2020-12-22 08:39:22,249 WARN L197 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-12-22 08:39:23,079 WARN L197 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-22 08:39:23,584 WARN L197 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-12-22 08:39:24,217 WARN L197 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-12-22 08:39:25,081 WARN L197 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 23 [2020-12-22 08:39:25,522 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 08:39:26,553 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 08:39:27,077 WARN L197 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-12-22 08:39:27,905 WARN L197 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-12-22 08:39:28,841 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2020-12-22 08:39:29,468 WARN L197 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-12-22 08:39:29,965 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-12-22 08:39:30,379 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-12-22 08:39:30,944 WARN L197 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-12-22 08:39:31,484 WARN L197 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-12-22 08:39:32,648 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-12-22 08:39:33,192 WARN L197 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2020-12-22 08:39:33,802 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22