/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/eca-rers2012/Problem16_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 02:17:58,479 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 02:17:58,482 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 02:17:58,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 02:17:58,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 02:17:58,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 02:17:58,526 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 02:17:58,529 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 02:17:58,543 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 02:17:58,544 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 02:17:58,545 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 02:17:58,546 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 02:17:58,548 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 02:17:58,551 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 02:17:58,558 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 02:17:58,560 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 02:17:58,565 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 02:17:58,566 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 02:17:58,573 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 02:17:58,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 02:17:58,583 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 02:17:58,585 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 02:17:58,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 02:17:58,588 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 02:17:58,595 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 02:17:58,595 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 02:17:58,596 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 02:17:58,601 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 02:17:58,601 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 02:17:58,603 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 02:17:58,606 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 02:17:58,607 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 02:17:58,608 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 02:17:58,609 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 02:17:58,611 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 02:17:58,612 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 02:17:58,612 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 02:17:58,613 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 02:17:58,613 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 02:17:58,614 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 02:17:58,615 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 02:17:58,618 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 02:17:58,674 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 02:17:58,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 02:17:58,680 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 02:17:58,680 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 02:17:58,680 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 02:17:58,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 02:17:58,681 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 02:17:58,681 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 02:17:58,681 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 02:17:58,681 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 02:17:58,683 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 02:17:58,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 02:17:58,683 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 02:17:58,683 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 02:17:58,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 02:17:58,684 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 02:17:58,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 02:17:58,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 02:17:58,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 02:17:58,685 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 02:17:58,685 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 02:17:58,685 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 02:17:58,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 02:17:58,685 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 02:17:58,686 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 02:17:58,686 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 02:17:59,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 02:17:59,161 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 02:17:59,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 02:17:59,166 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 02:17:59,167 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 02:17:59,168 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label43.c [2020-12-22 02:17:59,259 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b641789e/edeff21f7f8d450abb1bc12162a4ce0f/FLAG5029ce1f7 [2020-12-22 02:18:00,162 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 02:18:00,163 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label43.c [2020-12-22 02:18:00,183 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b641789e/edeff21f7f8d450abb1bc12162a4ce0f/FLAG5029ce1f7 [2020-12-22 02:18:00,250 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b641789e/edeff21f7f8d450abb1bc12162a4ce0f [2020-12-22 02:18:00,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 02:18:00,255 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 02:18:00,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 02:18:00,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 02:18:00,261 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 02:18:00,262 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:18:00" (1/1) ... [2020-12-22 02:18:00,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@215cebc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:18:00, skipping insertion in model container [2020-12-22 02:18:00,264 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:18:00" (1/1) ... [2020-12-22 02:18:00,273 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 02:18:00,340 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 02:18:00,546 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/eca-rers2012/Problem16_label43.c[1290,1303] [2020-12-22 02:18:01,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 02:18:01,161 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 02:18:01,178 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/eca-rers2012/Problem16_label43.c[1290,1303] [2020-12-22 02:18:01,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 02:18:01,597 INFO L208 MainTranslator]: Completed translation [2020-12-22 02:18:01,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:18:01 WrapperNode [2020-12-22 02:18:01,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 02:18:01,600 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 02:18:01,601 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 02:18:01,601 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 02:18:01,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:18:01" (1/1) ... [2020-12-22 02:18:01,667 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:18:01" (1/1) ... [2020-12-22 02:18:01,844 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 02:18:01,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 02:18:01,847 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 02:18:01,847 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 02:18:01,859 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:18:01" (1/1) ... [2020-12-22 02:18:01,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:18:01" (1/1) ... [2020-12-22 02:18:01,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:18:01" (1/1) ... [2020-12-22 02:18:01,876 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:18:01" (1/1) ... [2020-12-22 02:18:01,958 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:18:01" (1/1) ... [2020-12-22 02:18:01,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:18:01" (1/1) ... [2020-12-22 02:18:02,012 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:18:01" (1/1) ... [2020-12-22 02:18:02,042 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 02:18:02,043 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 02:18:02,043 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 02:18:02,043 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 02:18:02,044 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:18:01" (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 02:18:02,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 02:18:02,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 02:18:02,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 02:18:02,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 02:18:05,298 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 02:18:05,298 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-22 02:18:05,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:18:05 BoogieIcfgContainer [2020-12-22 02:18:05,302 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 02:18:05,304 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 02:18:05,304 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 02:18:05,309 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 02:18:05,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:18:00" (1/3) ... [2020-12-22 02:18:05,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33c33245 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:18:05, skipping insertion in model container [2020-12-22 02:18:05,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:18:01" (2/3) ... [2020-12-22 02:18:05,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33c33245 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:18:05, skipping insertion in model container [2020-12-22 02:18:05,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:18:05" (3/3) ... [2020-12-22 02:18:05,313 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem16_label43.c [2020-12-22 02:18:05,322 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 02:18:05,329 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 02:18:05,351 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 02:18:05,388 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 02:18:05,389 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 02:18:05,389 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 02:18:05,389 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 02:18:05,389 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 02:18:05,389 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 02:18:05,390 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 02:18:05,390 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 02:18:05,418 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states. [2020-12-22 02:18:05,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 02:18:05,425 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:18:05,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:18:05,427 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:18:05,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:18:05,435 INFO L82 PathProgramCache]: Analyzing trace with hash 647015545, now seen corresponding path program 1 times [2020-12-22 02:18:05,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:18:05,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875010556] [2020-12-22 02:18:05,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:18:05,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:18:05,660 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 02:18:05,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875010556] [2020-12-22 02:18:05,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:18:05,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:18:05,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951486046] [2020-12-22 02:18:05,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:18:05,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:18:05,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:18:05,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:18:05,691 INFO L87 Difference]: Start difference. First operand 396 states. Second operand 3 states. [2020-12-22 02:18:09,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:18:09,701 INFO L93 Difference]: Finished difference Result 1122 states and 2103 transitions. [2020-12-22 02:18:09,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:18:09,704 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-22 02:18:09,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:18:09,727 INFO L225 Difference]: With dead ends: 1122 [2020-12-22 02:18:09,728 INFO L226 Difference]: Without dead ends: 662 [2020-12-22 02:18:09,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 02:18:09,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2020-12-22 02:18:09,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2020-12-22 02:18:09,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 662 states. [2020-12-22 02:18:09,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1004 transitions. [2020-12-22 02:18:09,878 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1004 transitions. Word has length 9 [2020-12-22 02:18:09,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:18:09,879 INFO L481 AbstractCegarLoop]: Abstraction has 662 states and 1004 transitions. [2020-12-22 02:18:09,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:18:09,879 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1004 transitions. [2020-12-22 02:18:09,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 02:18:09,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:18:09,884 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:18:09,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 02:18:09,885 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:18:09,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:18:09,887 INFO L82 PathProgramCache]: Analyzing trace with hash 775844062, now seen corresponding path program 1 times [2020-12-22 02:18:09,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:18:09,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727759998] [2020-12-22 02:18:09,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:18:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:18:10,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:18:10,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727759998] [2020-12-22 02:18:10,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:18:10,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:18:10,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947654207] [2020-12-22 02:18:10,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:18:10,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:18:10,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:18:10,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:18:10,185 INFO L87 Difference]: Start difference. First operand 662 states and 1004 transitions. Second operand 3 states. [2020-12-22 02:18:13,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:18:13,716 INFO L93 Difference]: Finished difference Result 1980 states and 3007 transitions. [2020-12-22 02:18:13,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:18:13,717 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 02:18:13,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:18:13,726 INFO L225 Difference]: With dead ends: 1980 [2020-12-22 02:18:13,726 INFO L226 Difference]: Without dead ends: 1320 [2020-12-22 02:18:13,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 02:18:13,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2020-12-22 02:18:13,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1320. [2020-12-22 02:18:13,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1320 states. [2020-12-22 02:18:13,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1921 transitions. [2020-12-22 02:18:13,791 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1921 transitions. Word has length 77 [2020-12-22 02:18:13,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:18:13,792 INFO L481 AbstractCegarLoop]: Abstraction has 1320 states and 1921 transitions. [2020-12-22 02:18:13,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:18:13,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1921 transitions. [2020-12-22 02:18:13,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 02:18:13,799 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:18:13,799 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:18:13,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 02:18:13,800 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:18:13,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:18:13,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1780830263, now seen corresponding path program 1 times [2020-12-22 02:18:13,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:18:13,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020566903] [2020-12-22 02:18:13,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:18:13,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:18:14,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:18:14,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020566903] [2020-12-22 02:18:14,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:18:14,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:18:14,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471393616] [2020-12-22 02:18:14,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:18:14,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:18:14,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:18:14,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:18:14,119 INFO L87 Difference]: Start difference. First operand 1320 states and 1921 transitions. Second operand 4 states. [2020-12-22 02:18:19,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:18:19,361 INFO L93 Difference]: Finished difference Result 4283 states and 6147 transitions. [2020-12-22 02:18:19,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:18:19,363 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2020-12-22 02:18:19,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:18:19,380 INFO L225 Difference]: With dead ends: 4283 [2020-12-22 02:18:19,380 INFO L226 Difference]: Without dead ends: 2965 [2020-12-22 02:18:19,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 02:18:19,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2020-12-22 02:18:19,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2965. [2020-12-22 02:18:19,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2965 states. [2020-12-22 02:18:19,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 4054 transitions. [2020-12-22 02:18:19,453 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 4054 transitions. Word has length 88 [2020-12-22 02:18:19,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:18:19,453 INFO L481 AbstractCegarLoop]: Abstraction has 2965 states and 4054 transitions. [2020-12-22 02:18:19,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:18:19,454 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 4054 transitions. [2020-12-22 02:18:19,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-22 02:18:19,457 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:18:19,457 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:18:19,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 02:18:19,458 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:18:19,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:18:19,458 INFO L82 PathProgramCache]: Analyzing trace with hash -349385991, now seen corresponding path program 1 times [2020-12-22 02:18:19,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:18:19,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187347172] [2020-12-22 02:18:19,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:18:19,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:18:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:18:19,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187347172] [2020-12-22 02:18:19,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:18:19,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:18:19,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679984804] [2020-12-22 02:18:19,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:18:19,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:18:19,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:18:19,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:18:19,603 INFO L87 Difference]: Start difference. First operand 2965 states and 4054 transitions. Second operand 3 states. [2020-12-22 02:18:23,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:18:23,041 INFO L93 Difference]: Finished difference Result 6915 states and 9557 transitions. [2020-12-22 02:18:23,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:18:23,043 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 140 [2020-12-22 02:18:23,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:18:23,065 INFO L225 Difference]: With dead ends: 6915 [2020-12-22 02:18:23,066 INFO L226 Difference]: Without dead ends: 4281 [2020-12-22 02:18:23,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 02:18:23,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4281 states. [2020-12-22 02:18:23,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4281 to 4281. [2020-12-22 02:18:23,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4281 states. [2020-12-22 02:18:23,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4281 states to 4281 states and 5588 transitions. [2020-12-22 02:18:23,166 INFO L78 Accepts]: Start accepts. Automaton has 4281 states and 5588 transitions. Word has length 140 [2020-12-22 02:18:23,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:18:23,167 INFO L481 AbstractCegarLoop]: Abstraction has 4281 states and 5588 transitions. [2020-12-22 02:18:23,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:18:23,167 INFO L276 IsEmpty]: Start isEmpty. Operand 4281 states and 5588 transitions. [2020-12-22 02:18:23,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-12-22 02:18:23,171 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:18:23,172 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:18:23,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 02:18:23,172 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:18:23,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:18:23,173 INFO L82 PathProgramCache]: Analyzing trace with hash -324438107, now seen corresponding path program 1 times [2020-12-22 02:18:23,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:18:23,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307782291] [2020-12-22 02:18:23,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:18:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:18:23,410 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-22 02:18:23,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307782291] [2020-12-22 02:18:23,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:18:23,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:18:23,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344131114] [2020-12-22 02:18:23,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:18:23,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:18:23,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:18:23,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:18:23,416 INFO L87 Difference]: Start difference. First operand 4281 states and 5588 transitions. Second operand 3 states. [2020-12-22 02:18:26,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:18:26,756 INFO L93 Difference]: Finished difference Result 10534 states and 13926 transitions. [2020-12-22 02:18:26,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:18:26,758 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 175 [2020-12-22 02:18:26,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:18:26,791 INFO L225 Difference]: With dead ends: 10534 [2020-12-22 02:18:26,792 INFO L226 Difference]: Without dead ends: 6584 [2020-12-22 02:18:26,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 02:18:26,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6584 states. [2020-12-22 02:18:26,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6584 to 5597. [2020-12-22 02:18:26,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5597 states. [2020-12-22 02:18:26,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5597 states to 5597 states and 6810 transitions. [2020-12-22 02:18:26,924 INFO L78 Accepts]: Start accepts. Automaton has 5597 states and 6810 transitions. Word has length 175 [2020-12-22 02:18:26,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:18:26,925 INFO L481 AbstractCegarLoop]: Abstraction has 5597 states and 6810 transitions. [2020-12-22 02:18:26,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:18:26,925 INFO L276 IsEmpty]: Start isEmpty. Operand 5597 states and 6810 transitions. [2020-12-22 02:18:26,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-12-22 02:18:26,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:18:26,929 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:18:26,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 02:18:26,930 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:18:26,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:18:26,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1706512509, now seen corresponding path program 1 times [2020-12-22 02:18:26,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:18:26,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374399520] [2020-12-22 02:18:26,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:18:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:18:27,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 02:18:27,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374399520] [2020-12-22 02:18:27,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:18:27,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:18:27,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938588102] [2020-12-22 02:18:27,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:18:27,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:18:27,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:18:27,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:18:27,241 INFO L87 Difference]: Start difference. First operand 5597 states and 6810 transitions. Second operand 3 states. [2020-12-22 02:18:30,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:18:30,983 INFO L93 Difference]: Finished difference Result 13495 states and 16441 transitions. [2020-12-22 02:18:30,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:18:30,987 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 244 [2020-12-22 02:18:30,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:18:31,027 INFO L225 Difference]: With dead ends: 13495 [2020-12-22 02:18:31,027 INFO L226 Difference]: Without dead ends: 8229 [2020-12-22 02:18:31,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 02:18:31,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8229 states. [2020-12-22 02:18:31,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8229 to 8229. [2020-12-22 02:18:31,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8229 states. [2020-12-22 02:18:31,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8229 states to 8229 states and 9903 transitions. [2020-12-22 02:18:31,258 INFO L78 Accepts]: Start accepts. Automaton has 8229 states and 9903 transitions. Word has length 244 [2020-12-22 02:18:31,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:18:31,259 INFO L481 AbstractCegarLoop]: Abstraction has 8229 states and 9903 transitions. [2020-12-22 02:18:31,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:18:31,259 INFO L276 IsEmpty]: Start isEmpty. Operand 8229 states and 9903 transitions. [2020-12-22 02:18:31,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-12-22 02:18:31,265 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:18:31,265 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:18:31,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 02:18:31,266 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:18:31,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:18:31,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1358280981, now seen corresponding path program 1 times [2020-12-22 02:18:31,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:18:31,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887941092] [2020-12-22 02:18:31,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:18:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:18:31,863 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:18:31,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887941092] [2020-12-22 02:18:31,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:18:31,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 02:18:31,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018973766] [2020-12-22 02:18:31,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 02:18:31,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:18:31,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 02:18:31,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:18:31,866 INFO L87 Difference]: Start difference. First operand 8229 states and 9903 transitions. Second operand 7 states. [2020-12-22 02:18:36,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:18:36,670 INFO L93 Difference]: Finished difference Result 15717 states and 19011 transitions. [2020-12-22 02:18:36,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 02:18:36,675 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 331 [2020-12-22 02:18:36,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:18:36,708 INFO L225 Difference]: With dead ends: 15717 [2020-12-22 02:18:36,709 INFO L226 Difference]: Without dead ends: 7900 [2020-12-22 02:18:36,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:18:36,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7900 states. [2020-12-22 02:18:36,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7900 to 7900. [2020-12-22 02:18:36,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7900 states. [2020-12-22 02:18:36,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7900 states to 7900 states and 8567 transitions. [2020-12-22 02:18:36,851 INFO L78 Accepts]: Start accepts. Automaton has 7900 states and 8567 transitions. Word has length 331 [2020-12-22 02:18:36,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:18:36,852 INFO L481 AbstractCegarLoop]: Abstraction has 7900 states and 8567 transitions. [2020-12-22 02:18:36,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 02:18:36,852 INFO L276 IsEmpty]: Start isEmpty. Operand 7900 states and 8567 transitions. [2020-12-22 02:18:36,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-12-22 02:18:36,858 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:18:36,858 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:18:36,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 02:18:36,859 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:18:36,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:18:36,859 INFO L82 PathProgramCache]: Analyzing trace with hash 398891452, now seen corresponding path program 1 times [2020-12-22 02:18:36,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:18:36,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679323214] [2020-12-22 02:18:36,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:18:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:18:37,237 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-22 02:18:37,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679323214] [2020-12-22 02:18:37,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:18:37,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:18:37,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977533327] [2020-12-22 02:18:37,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:18:37,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:18:37,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:18:37,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:18:37,241 INFO L87 Difference]: Start difference. First operand 7900 states and 8567 transitions. Second operand 3 states. [2020-12-22 02:18:39,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:18:39,859 INFO L93 Difference]: Finished difference Result 18101 states and 19824 transitions. [2020-12-22 02:18:39,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:18:39,861 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 348 [2020-12-22 02:18:39,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:18:39,884 INFO L225 Difference]: With dead ends: 18101 [2020-12-22 02:18:39,885 INFO L226 Difference]: Without dead ends: 10861 [2020-12-22 02:18:39,895 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 02:18:39,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10861 states. [2020-12-22 02:18:40,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10861 to 10861. [2020-12-22 02:18:40,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10861 states. [2020-12-22 02:18:40,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10861 states to 10861 states and 11708 transitions. [2020-12-22 02:18:40,087 INFO L78 Accepts]: Start accepts. Automaton has 10861 states and 11708 transitions. Word has length 348 [2020-12-22 02:18:40,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:18:40,087 INFO L481 AbstractCegarLoop]: Abstraction has 10861 states and 11708 transitions. [2020-12-22 02:18:40,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:18:40,088 INFO L276 IsEmpty]: Start isEmpty. Operand 10861 states and 11708 transitions. [2020-12-22 02:18:40,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2020-12-22 02:18:40,102 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:18:40,103 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:18:40,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 02:18:40,103 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:18:40,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:18:40,104 INFO L82 PathProgramCache]: Analyzing trace with hash 2114687892, now seen corresponding path program 1 times [2020-12-22 02:18:40,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:18:40,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151066116] [2020-12-22 02:18:40,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:18:40,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:18:40,743 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 450 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 02:18:40,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151066116] [2020-12-22 02:18:40,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:18:40,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:18:40,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577309284] [2020-12-22 02:18:40,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:18:40,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:18:40,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:18:40,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:18:40,749 INFO L87 Difference]: Start difference. First operand 10861 states and 11708 transitions. Second operand 3 states. [2020-12-22 02:18:43,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:18:43,227 INFO L93 Difference]: Finished difference Result 21391 states and 23083 transitions. [2020-12-22 02:18:43,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:18:43,228 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 543 [2020-12-22 02:18:43,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:18:43,249 INFO L225 Difference]: With dead ends: 21391 [2020-12-22 02:18:43,250 INFO L226 Difference]: Without dead ends: 10861 [2020-12-22 02:18:43,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:18:43,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10861 states. [2020-12-22 02:18:43,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10861 to 10861. [2020-12-22 02:18:43,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10861 states. [2020-12-22 02:18:43,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10861 states to 10861 states and 11439 transitions. [2020-12-22 02:18:43,460 INFO L78 Accepts]: Start accepts. Automaton has 10861 states and 11439 transitions. Word has length 543 [2020-12-22 02:18:43,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:18:43,461 INFO L481 AbstractCegarLoop]: Abstraction has 10861 states and 11439 transitions. [2020-12-22 02:18:43,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:18:43,461 INFO L276 IsEmpty]: Start isEmpty. Operand 10861 states and 11439 transitions. [2020-12-22 02:18:43,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 638 [2020-12-22 02:18:43,482 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:18:43,483 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:18:43,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 02:18:43,484 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:18:43,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:18:43,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1078587575, now seen corresponding path program 1 times [2020-12-22 02:18:43,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:18:43,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102250691] [2020-12-22 02:18:43,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:18:43,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:18:44,111 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 299 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2020-12-22 02:18:44,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102250691] [2020-12-22 02:18:44,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:18:44,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:18:44,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490297803] [2020-12-22 02:18:44,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:18:44,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:18:44,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:18:44,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:18:44,114 INFO L87 Difference]: Start difference. First operand 10861 states and 11439 transitions. Second operand 3 states. [2020-12-22 02:18:46,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:18:46,917 INFO L93 Difference]: Finished difference Result 24352 states and 25709 transitions. [2020-12-22 02:18:46,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:18:46,923 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 637 [2020-12-22 02:18:46,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:18:46,960 INFO L225 Difference]: With dead ends: 24352 [2020-12-22 02:18:46,960 INFO L226 Difference]: Without dead ends: 14151 [2020-12-22 02:18:46,975 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 02:18:46,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14151 states. [2020-12-22 02:18:47,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14151 to 13493. [2020-12-22 02:18:47,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13493 states. [2020-12-22 02:18:47,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13493 states to 13493 states and 14167 transitions. [2020-12-22 02:18:47,203 INFO L78 Accepts]: Start accepts. Automaton has 13493 states and 14167 transitions. Word has length 637 [2020-12-22 02:18:47,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:18:47,204 INFO L481 AbstractCegarLoop]: Abstraction has 13493 states and 14167 transitions. [2020-12-22 02:18:47,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:18:47,205 INFO L276 IsEmpty]: Start isEmpty. Operand 13493 states and 14167 transitions. [2020-12-22 02:18:47,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 704 [2020-12-22 02:18:47,217 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:18:47,218 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:18:47,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 02:18:47,219 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:18:47,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:18:47,220 INFO L82 PathProgramCache]: Analyzing trace with hash -2125689641, now seen corresponding path program 1 times [2020-12-22 02:18:47,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:18:47,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532195644] [2020-12-22 02:18:47,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:18:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:18:48,198 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 372 proven. 0 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2020-12-22 02:18:48,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532195644] [2020-12-22 02:18:48,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:18:48,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:18:48,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012080430] [2020-12-22 02:18:48,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:18:48,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:18:48,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:18:48,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:18:48,204 INFO L87 Difference]: Start difference. First operand 13493 states and 14167 transitions. Second operand 3 states. [2020-12-22 02:18:50,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:18:50,877 INFO L93 Difference]: Finished difference Result 28958 states and 30483 transitions. [2020-12-22 02:18:50,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:18:50,878 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 703 [2020-12-22 02:18:50,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:18:50,907 INFO L225 Difference]: With dead ends: 28958 [2020-12-22 02:18:50,908 INFO L226 Difference]: Without dead ends: 16125 [2020-12-22 02:18:50,925 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 02:18:50,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16125 states. [2020-12-22 02:18:51,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16125 to 15796. [2020-12-22 02:18:51,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15796 states. [2020-12-22 02:18:51,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15796 states to 15796 states and 16561 transitions. [2020-12-22 02:18:51,264 INFO L78 Accepts]: Start accepts. Automaton has 15796 states and 16561 transitions. Word has length 703 [2020-12-22 02:18:51,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:18:51,265 INFO L481 AbstractCegarLoop]: Abstraction has 15796 states and 16561 transitions. [2020-12-22 02:18:51,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:18:51,265 INFO L276 IsEmpty]: Start isEmpty. Operand 15796 states and 16561 transitions. [2020-12-22 02:18:51,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 729 [2020-12-22 02:18:51,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:18:51,279 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:18:51,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 02:18:51,280 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:18:51,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:18:51,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1912551145, now seen corresponding path program 1 times [2020-12-22 02:18:51,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:18:51,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227600981] [2020-12-22 02:18:51,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:18:51,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:18:51,971 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2020-12-22 02:18:51,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227600981] [2020-12-22 02:18:51,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:18:51,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:18:51,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439438779] [2020-12-22 02:18:51,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:18:51,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:18:51,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:18:51,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:18:51,974 INFO L87 Difference]: Start difference. First operand 15796 states and 16561 transitions. Second operand 3 states. [2020-12-22 02:18:54,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:18:54,804 INFO L93 Difference]: Finished difference Result 32906 states and 34459 transitions. [2020-12-22 02:18:54,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:18:54,806 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 728 [2020-12-22 02:18:54,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:18:54,851 INFO L225 Difference]: With dead ends: 32906 [2020-12-22 02:18:54,851 INFO L226 Difference]: Without dead ends: 15796 [2020-12-22 02:18:54,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:18:54,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15796 states. [2020-12-22 02:18:55,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15796 to 15796. [2020-12-22 02:18:55,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15796 states. [2020-12-22 02:18:55,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15796 states to 15796 states and 16319 transitions. [2020-12-22 02:18:55,204 INFO L78 Accepts]: Start accepts. Automaton has 15796 states and 16319 transitions. Word has length 728 [2020-12-22 02:18:55,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:18:55,205 INFO L481 AbstractCegarLoop]: Abstraction has 15796 states and 16319 transitions. [2020-12-22 02:18:55,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:18:55,205 INFO L276 IsEmpty]: Start isEmpty. Operand 15796 states and 16319 transitions. [2020-12-22 02:18:55,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2020-12-22 02:18:55,230 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:18:55,231 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:18:55,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 02:18:55,231 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:18:55,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:18:55,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1190471861, now seen corresponding path program 1 times [2020-12-22 02:18:55,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:18:55,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730338241] [2020-12-22 02:18:55,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:18:55,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:18:57,339 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 482 proven. 234 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 02:18:57,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730338241] [2020-12-22 02:18:57,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062724677] [2020-12-22 02:18:57,340 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 02:18:57,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:18:57,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 942 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 02:18:57,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:18:59,624 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2020-12-22 02:18:59,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:18:59,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2020-12-22 02:18:59,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776873621] [2020-12-22 02:18:59,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:18:59,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:18:59,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:18:59,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 02:18:59,628 INFO L87 Difference]: Start difference. First operand 15796 states and 16319 transitions. Second operand 3 states. [2020-12-22 02:19:02,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:19:02,404 INFO L93 Difference]: Finished difference Result 33564 states and 34708 transitions. [2020-12-22 02:19:02,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:19:02,405 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 801 [2020-12-22 02:19:02,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:19:02,433 INFO L225 Difference]: With dead ends: 33564 [2020-12-22 02:19:02,434 INFO L226 Difference]: Without dead ends: 18428 [2020-12-22 02:19:02,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 806 GetRequests, 800 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 02:19:02,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18428 states. [2020-12-22 02:19:02,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18428 to 15138. [2020-12-22 02:19:02,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15138 states. [2020-12-22 02:19:02,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15138 states to 15138 states and 15603 transitions. [2020-12-22 02:19:02,674 INFO L78 Accepts]: Start accepts. Automaton has 15138 states and 15603 transitions. Word has length 801 [2020-12-22 02:19:02,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:19:02,675 INFO L481 AbstractCegarLoop]: Abstraction has 15138 states and 15603 transitions. [2020-12-22 02:19:02,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:19:02,675 INFO L276 IsEmpty]: Start isEmpty. Operand 15138 states and 15603 transitions. [2020-12-22 02:19:02,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1094 [2020-12-22 02:19:02,704 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:19:02,705 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:19:02,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 02:19:02,920 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:19:02,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:19:02,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1431320228, now seen corresponding path program 1 times [2020-12-22 02:19:02,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:19:02,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236684105] [2020-12-22 02:19:02,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:19:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:19:04,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2260 backedges. 1626 proven. 0 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-12-22 02:19:04,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236684105] [2020-12-22 02:19:04,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:19:04,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:19:04,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833158078] [2020-12-22 02:19:04,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:19:04,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:19:04,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:19:04,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:19:04,254 INFO L87 Difference]: Start difference. First operand 15138 states and 15603 transitions. Second operand 3 states. [2020-12-22 02:19:06,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:19:06,676 INFO L93 Difference]: Finished difference Result 29945 states and 30873 transitions. [2020-12-22 02:19:06,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:19:06,678 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1093 [2020-12-22 02:19:06,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:19:06,693 INFO L225 Difference]: With dead ends: 29945 [2020-12-22 02:19:06,694 INFO L226 Difference]: Without dead ends: 15138 [2020-12-22 02:19:06,703 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 02:19:06,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15138 states. [2020-12-22 02:19:06,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15138 to 14480. [2020-12-22 02:19:06,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14480 states. [2020-12-22 02:19:06,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14480 states to 14480 states and 14850 transitions. [2020-12-22 02:19:06,880 INFO L78 Accepts]: Start accepts. Automaton has 14480 states and 14850 transitions. Word has length 1093 [2020-12-22 02:19:06,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:19:06,882 INFO L481 AbstractCegarLoop]: Abstraction has 14480 states and 14850 transitions. [2020-12-22 02:19:06,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:19:06,882 INFO L276 IsEmpty]: Start isEmpty. Operand 14480 states and 14850 transitions. [2020-12-22 02:19:06,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1095 [2020-12-22 02:19:06,908 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:19:06,909 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:19:06,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 02:19:06,910 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:19:06,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:19:06,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1434123885, now seen corresponding path program 1 times [2020-12-22 02:19:06,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:19:06,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324734568] [2020-12-22 02:19:06,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:19:07,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:19:08,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2266 backedges. 453 proven. 0 refuted. 0 times theorem prover too weak. 1813 trivial. 0 not checked. [2020-12-22 02:19:08,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324734568] [2020-12-22 02:19:08,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:19:08,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:19:08,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323309157] [2020-12-22 02:19:08,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:19:08,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:19:08,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:19:08,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:19:08,323 INFO L87 Difference]: Start difference. First operand 14480 states and 14850 transitions. Second operand 3 states. [2020-12-22 02:19:10,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:19:10,975 INFO L93 Difference]: Finished difference Result 31590 states and 32423 transitions. [2020-12-22 02:19:10,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:19:10,976 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1094 [2020-12-22 02:19:10,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:19:10,993 INFO L225 Difference]: With dead ends: 31590 [2020-12-22 02:19:10,993 INFO L226 Difference]: Without dead ends: 15467 [2020-12-22 02:19:11,005 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 02:19:11,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15467 states. [2020-12-22 02:19:11,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15467 to 13164. [2020-12-22 02:19:11,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13164 states. [2020-12-22 02:19:11,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13164 states to 13164 states and 13457 transitions. [2020-12-22 02:19:11,159 INFO L78 Accepts]: Start accepts. Automaton has 13164 states and 13457 transitions. Word has length 1094 [2020-12-22 02:19:11,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:19:11,160 INFO L481 AbstractCegarLoop]: Abstraction has 13164 states and 13457 transitions. [2020-12-22 02:19:11,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:19:11,161 INFO L276 IsEmpty]: Start isEmpty. Operand 13164 states and 13457 transitions. [2020-12-22 02:19:11,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1414 [2020-12-22 02:19:11,194 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:19:11,195 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:19:11,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 02:19:11,195 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:19:11,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:19:11,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1625306995, now seen corresponding path program 1 times [2020-12-22 02:19:11,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:19:11,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269432813] [2020-12-22 02:19:11,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:19:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:19:13,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3907 backedges. 2385 proven. 0 refuted. 0 times theorem prover too weak. 1522 trivial. 0 not checked. [2020-12-22 02:19:13,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269432813] [2020-12-22 02:19:13,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:19:13,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:19:13,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783443737] [2020-12-22 02:19:13,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:19:13,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:19:13,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:19:13,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:19:13,367 INFO L87 Difference]: Start difference. First operand 13164 states and 13457 transitions. Second operand 3 states. [2020-12-22 02:19:15,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:19:15,922 INFO L93 Difference]: Finished difference Result 26326 states and 26913 transitions. [2020-12-22 02:19:15,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:19:15,923 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1413 [2020-12-22 02:19:15,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:19:15,935 INFO L225 Difference]: With dead ends: 26326 [2020-12-22 02:19:15,935 INFO L226 Difference]: Without dead ends: 13493 [2020-12-22 02:19:15,944 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 02:19:15,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13493 states. [2020-12-22 02:19:16,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13493 to 13493. [2020-12-22 02:19:16,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13493 states. [2020-12-22 02:19:16,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13493 states to 13493 states and 13783 transitions. [2020-12-22 02:19:16,080 INFO L78 Accepts]: Start accepts. Automaton has 13493 states and 13783 transitions. Word has length 1413 [2020-12-22 02:19:16,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:19:16,081 INFO L481 AbstractCegarLoop]: Abstraction has 13493 states and 13783 transitions. [2020-12-22 02:19:16,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:19:16,082 INFO L276 IsEmpty]: Start isEmpty. Operand 13493 states and 13783 transitions. [2020-12-22 02:19:16,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1452 [2020-12-22 02:19:16,114 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:19:16,115 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 02:19:16,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 02:19:16,116 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:19:16,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:19:16,116 INFO L82 PathProgramCache]: Analyzing trace with hash 199772619, now seen corresponding path program 1 times [2020-12-22 02:19:16,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:19:16,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137966636] [2020-12-22 02:19:16,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:19:16,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:19:18,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3732 backedges. 2706 proven. 0 refuted. 0 times theorem prover too weak. 1026 trivial. 0 not checked. [2020-12-22 02:19:18,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137966636] [2020-12-22 02:19:18,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:19:18,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 02:19:18,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193877729] [2020-12-22 02:19:18,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 02:19:18,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:19:18,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 02:19:18,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 02:19:18,554 INFO L87 Difference]: Start difference. First operand 13493 states and 13783 transitions. Second operand 6 states. [2020-12-22 02:19:22,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:19:22,924 INFO L93 Difference]: Finished difference Result 26764 states and 27342 transitions. [2020-12-22 02:19:22,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 02:19:22,926 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1451 [2020-12-22 02:19:22,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:19:22,940 INFO L225 Difference]: With dead ends: 26764 [2020-12-22 02:19:22,940 INFO L226 Difference]: Without dead ends: 13602 [2020-12-22 02:19:22,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:19:22,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13602 states. [2020-12-22 02:19:23,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13602 to 13493. [2020-12-22 02:19:23,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13493 states. [2020-12-22 02:19:23,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13493 states to 13493 states and 13779 transitions. [2020-12-22 02:19:23,070 INFO L78 Accepts]: Start accepts. Automaton has 13493 states and 13779 transitions. Word has length 1451 [2020-12-22 02:19:23,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:19:23,071 INFO L481 AbstractCegarLoop]: Abstraction has 13493 states and 13779 transitions. [2020-12-22 02:19:23,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 02:19:23,072 INFO L276 IsEmpty]: Start isEmpty. Operand 13493 states and 13779 transitions. [2020-12-22 02:19:23,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1466 [2020-12-22 02:19:23,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:19:23,102 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 02:19:23,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 02:19:23,102 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:19:23,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:19:23,103 INFO L82 PathProgramCache]: Analyzing trace with hash -526800157, now seen corresponding path program 1 times [2020-12-22 02:19:23,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:19:23,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461406516] [2020-12-22 02:19:23,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:19:23,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:19:25,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3664 backedges. 2675 proven. 0 refuted. 0 times theorem prover too weak. 989 trivial. 0 not checked. [2020-12-22 02:19:25,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461406516] [2020-12-22 02:19:25,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:19:25,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 02:19:25,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265865328] [2020-12-22 02:19:25,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 02:19:25,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:19:25,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 02:19:25,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 02:19:25,907 INFO L87 Difference]: Start difference. First operand 13493 states and 13779 transitions. Second operand 5 states. [2020-12-22 02:19:30,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:19:30,955 INFO L93 Difference]: Finished difference Result 27322 states and 27899 transitions. [2020-12-22 02:19:30,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 02:19:30,956 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1465 [2020-12-22 02:19:30,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:19:30,974 INFO L225 Difference]: With dead ends: 27322 [2020-12-22 02:19:30,974 INFO L226 Difference]: Without dead ends: 14160 [2020-12-22 02:19:30,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:19:30,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14160 states. [2020-12-22 02:19:31,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14160 to 13822. [2020-12-22 02:19:31,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13822 states. [2020-12-22 02:19:31,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13822 states to 13822 states and 14104 transitions. [2020-12-22 02:19:31,153 INFO L78 Accepts]: Start accepts. Automaton has 13822 states and 14104 transitions. Word has length 1465 [2020-12-22 02:19:31,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:19:31,154 INFO L481 AbstractCegarLoop]: Abstraction has 13822 states and 14104 transitions. [2020-12-22 02:19:31,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 02:19:31,155 INFO L276 IsEmpty]: Start isEmpty. Operand 13822 states and 14104 transitions. [2020-12-22 02:19:31,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1468 [2020-12-22 02:19:31,175 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:19:31,176 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:19:31,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 02:19:31,177 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:19:31,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:19:31,177 INFO L82 PathProgramCache]: Analyzing trace with hash 622330252, now seen corresponding path program 1 times [2020-12-22 02:19:31,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:19:31,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891982006] [2020-12-22 02:19:31,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:19:31,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:19:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3966 backedges. 1516 proven. 1209 refuted. 0 times theorem prover too weak. 1241 trivial. 0 not checked. [2020-12-22 02:19:34,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891982006] [2020-12-22 02:19:34,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822411000] [2020-12-22 02:19:34,819 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 02:19:35,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:19:35,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 1719 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 02:19:35,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:19:39,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3966 backedges. 2308 proven. 0 refuted. 0 times theorem prover too weak. 1658 trivial. 0 not checked. [2020-12-22 02:19:39,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:19:39,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2020-12-22 02:19:39,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235127498] [2020-12-22 02:19:39,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:19:39,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:19:39,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:19:39,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 02:19:39,715 INFO L87 Difference]: Start difference. First operand 13822 states and 14104 transitions. Second operand 3 states. [2020-12-22 02:19:42,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:19:42,392 INFO L93 Difference]: Finished difference Result 27313 states and 27875 transitions. [2020-12-22 02:19:42,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:19:42,394 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1467 [2020-12-22 02:19:42,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:19:42,414 INFO L225 Difference]: With dead ends: 27313 [2020-12-22 02:19:42,414 INFO L226 Difference]: Without dead ends: 13822 [2020-12-22 02:19:42,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1471 GetRequests, 1467 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 02:19:42,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13822 states. [2020-12-22 02:19:42,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13822 to 13493. [2020-12-22 02:19:42,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13493 states. [2020-12-22 02:19:42,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13493 states to 13493 states and 13736 transitions. [2020-12-22 02:19:42,689 INFO L78 Accepts]: Start accepts. Automaton has 13493 states and 13736 transitions. Word has length 1467 [2020-12-22 02:19:42,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:19:42,690 INFO L481 AbstractCegarLoop]: Abstraction has 13493 states and 13736 transitions. [2020-12-22 02:19:42,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:19:42,691 INFO L276 IsEmpty]: Start isEmpty. Operand 13493 states and 13736 transitions. [2020-12-22 02:19:42,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1634 [2020-12-22 02:19:42,732 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:19:42,734 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:19:42,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:19:42,948 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:19:42,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:19:42,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1067860372, now seen corresponding path program 1 times [2020-12-22 02:19:42,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:19:42,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369656993] [2020-12-22 02:19:42,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:19:43,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:19:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 603 proven. 0 refuted. 0 times theorem prover too weak. 3955 trivial. 0 not checked. [2020-12-22 02:19:44,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369656993] [2020-12-22 02:19:45,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:19:45,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:19:45,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177396077] [2020-12-22 02:19:45,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:19:45,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:19:45,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:19:45,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:19:45,002 INFO L87 Difference]: Start difference. First operand 13493 states and 13736 transitions. Second operand 3 states. [2020-12-22 02:19:47,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:19:47,800 INFO L93 Difference]: Finished difference Result 30932 states and 31503 transitions. [2020-12-22 02:19:47,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:19:47,801 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1633 [2020-12-22 02:19:47,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:19:47,818 INFO L225 Difference]: With dead ends: 30932 [2020-12-22 02:19:47,819 INFO L226 Difference]: Without dead ends: 17770 [2020-12-22 02:19:47,828 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 02:19:47,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17770 states. [2020-12-22 02:19:47,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17770 to 13493. [2020-12-22 02:19:47,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13493 states. [2020-12-22 02:19:47,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13493 states to 13493 states and 13735 transitions. [2020-12-22 02:19:47,955 INFO L78 Accepts]: Start accepts. Automaton has 13493 states and 13735 transitions. Word has length 1633 [2020-12-22 02:19:47,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:19:47,956 INFO L481 AbstractCegarLoop]: Abstraction has 13493 states and 13735 transitions. [2020-12-22 02:19:47,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:19:47,956 INFO L276 IsEmpty]: Start isEmpty. Operand 13493 states and 13735 transitions. [2020-12-22 02:19:47,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2029 [2020-12-22 02:19:47,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:19:47,999 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:19:47,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 02:19:47,999 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:19:47,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:19:48,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1166711969, now seen corresponding path program 1 times [2020-12-22 02:19:48,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:19:48,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117476930] [2020-12-22 02:19:48,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:19:48,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:19:53,681 INFO L134 CoverageAnalysis]: Checked inductivity of 7431 backedges. 5727 proven. 450 refuted. 0 times theorem prover too weak. 1254 trivial. 0 not checked. [2020-12-22 02:19:53,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117476930] [2020-12-22 02:19:53,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352497396] [2020-12-22 02:19:53,682 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 02:19:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:19:54,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 2368 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 02:19:54,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:20:02,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7431 backedges. 2914 proven. 201 refuted. 0 times theorem prover too weak. 4316 trivial. 0 not checked. [2020-12-22 02:20:02,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 02:20:02,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3] total 9 [2020-12-22 02:20:02,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846013405] [2020-12-22 02:20:02,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 02:20:02,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:20:02,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 02:20:02,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-12-22 02:20:02,609 INFO L87 Difference]: Start difference. First operand 13493 states and 13735 transitions. Second operand 9 states. [2020-12-22 02:20:21,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:20:21,125 INFO L93 Difference]: Finished difference Result 36996 states and 37667 transitions. [2020-12-22 02:20:21,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 02:20:21,126 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 2028 [2020-12-22 02:20:21,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:20:21,199 INFO L225 Difference]: With dead ends: 36996 [2020-12-22 02:20:21,200 INFO L226 Difference]: Without dead ends: 23834 [2020-12-22 02:20:21,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2068 GetRequests, 2045 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-12-22 02:20:21,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23834 states. [2020-12-22 02:20:21,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23834 to 13822. [2020-12-22 02:20:21,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13822 states. [2020-12-22 02:20:21,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13822 states to 13822 states and 14064 transitions. [2020-12-22 02:20:21,474 INFO L78 Accepts]: Start accepts. Automaton has 13822 states and 14064 transitions. Word has length 2028 [2020-12-22 02:20:21,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:20:21,475 INFO L481 AbstractCegarLoop]: Abstraction has 13822 states and 14064 transitions. [2020-12-22 02:20:21,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 02:20:21,475 INFO L276 IsEmpty]: Start isEmpty. Operand 13822 states and 14064 transitions. [2020-12-22 02:20:21,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2104 [2020-12-22 02:20:21,519 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:20:21,520 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:20:21,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:20:21,734 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:20:21,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:20:21,736 INFO L82 PathProgramCache]: Analyzing trace with hash -112232842, now seen corresponding path program 1 times [2020-12-22 02:20:21,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:20:21,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704128418] [2020-12-22 02:20:21,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:20:21,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:20:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 8067 backedges. 2769 proven. 156 refuted. 0 times theorem prover too weak. 5142 trivial. 0 not checked. [2020-12-22 02:20:26,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704128418] [2020-12-22 02:20:26,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986154270] [2020-12-22 02:20:26,565 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 02:20:27,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:20:27,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 2473 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 02:20:27,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:20:32,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8067 backedges. 2925 proven. 0 refuted. 0 times theorem prover too weak. 5142 trivial. 0 not checked. [2020-12-22 02:20:32,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:20:32,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2020-12-22 02:20:32,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754153068] [2020-12-22 02:20:32,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:20:32,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:20:32,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:20:32,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:20:32,007 INFO L87 Difference]: Start difference. First operand 13822 states and 14064 transitions. Second operand 3 states. [2020-12-22 02:20:33,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:20:33,960 INFO L93 Difference]: Finished difference Result 28958 states and 29474 transitions. [2020-12-22 02:20:33,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:20:33,963 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2103 [2020-12-22 02:20:33,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:20:34,010 INFO L225 Difference]: With dead ends: 28958 [2020-12-22 02:20:34,011 INFO L226 Difference]: Without dead ends: 15467 [2020-12-22 02:20:34,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2107 GetRequests, 2102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:20:34,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15467 states. [2020-12-22 02:20:34,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15467 to 15467. [2020-12-22 02:20:34,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15467 states. [2020-12-22 02:20:34,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15467 states to 15467 states and 15727 transitions. [2020-12-22 02:20:34,221 INFO L78 Accepts]: Start accepts. Automaton has 15467 states and 15727 transitions. Word has length 2103 [2020-12-22 02:20:34,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:20:34,221 INFO L481 AbstractCegarLoop]: Abstraction has 15467 states and 15727 transitions. [2020-12-22 02:20:34,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:20:34,221 INFO L276 IsEmpty]: Start isEmpty. Operand 15467 states and 15727 transitions. [2020-12-22 02:20:34,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2167 [2020-12-22 02:20:34,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:20:34,258 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:20:34,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:20:34,461 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:20:34,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:20:34,463 INFO L82 PathProgramCache]: Analyzing trace with hash 833381027, now seen corresponding path program 1 times [2020-12-22 02:20:34,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:20:34,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408015680] [2020-12-22 02:20:34,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:20:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:20:40,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 4781 proven. 1581 refuted. 0 times theorem prover too weak. 2023 trivial. 0 not checked. [2020-12-22 02:20:40,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408015680] [2020-12-22 02:20:40,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405612038] [2020-12-22 02:20:40,961 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 02:20:41,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:20:41,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 2538 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 02:20:41,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:20:45,706 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 4757 proven. 0 refuted. 0 times theorem prover too weak. 3628 trivial. 0 not checked. [2020-12-22 02:20:45,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:20:45,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2020-12-22 02:20:45,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359020657] [2020-12-22 02:20:45,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:20:45,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:20:45,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:20:45,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 02:20:45,710 INFO L87 Difference]: Start difference. First operand 15467 states and 15727 transitions. Second operand 3 states. [2020-12-22 02:20:47,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:20:47,369 INFO L93 Difference]: Finished difference Result 31261 states and 31790 transitions. [2020-12-22 02:20:47,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:20:47,371 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2166 [2020-12-22 02:20:47,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:20:47,391 INFO L225 Difference]: With dead ends: 31261 [2020-12-22 02:20:47,392 INFO L226 Difference]: Without dead ends: 16125 [2020-12-22 02:20:47,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2171 GetRequests, 2167 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 02:20:47,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16125 states. [2020-12-22 02:20:47,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16125 to 16125. [2020-12-22 02:20:47,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16125 states. [2020-12-22 02:20:47,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16125 states to 16125 states and 16389 transitions. [2020-12-22 02:20:47,631 INFO L78 Accepts]: Start accepts. Automaton has 16125 states and 16389 transitions. Word has length 2166 [2020-12-22 02:20:47,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:20:47,633 INFO L481 AbstractCegarLoop]: Abstraction has 16125 states and 16389 transitions. [2020-12-22 02:20:47,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:20:47,633 INFO L276 IsEmpty]: Start isEmpty. Operand 16125 states and 16389 transitions. [2020-12-22 02:20:47,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2380 [2020-12-22 02:20:47,676 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:20:47,677 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:20:47,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 02:20:47,887 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:20:47,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:20:47,889 INFO L82 PathProgramCache]: Analyzing trace with hash 280698768, now seen corresponding path program 1 times [2020-12-22 02:20:47,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:20:47,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516504593] [2020-12-22 02:20:47,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:20:48,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:20:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9692 backedges. 4793 proven. 1035 refuted. 0 times theorem prover too weak. 3864 trivial. 0 not checked. [2020-12-22 02:20:55,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516504593] [2020-12-22 02:20:55,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253610875] [2020-12-22 02:20:55,800 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 02:20:56,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:20:56,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 2751 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 02:20:56,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:21:00,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9692 backedges. 5177 proven. 0 refuted. 0 times theorem prover too weak. 4515 trivial. 0 not checked. [2020-12-22 02:21:00,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:21:00,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2020-12-22 02:21:00,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074706128] [2020-12-22 02:21:00,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:21:00,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:21:00,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:21:00,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-22 02:21:00,689 INFO L87 Difference]: Start difference. First operand 16125 states and 16389 transitions. Second operand 3 states. [2020-12-22 02:21:02,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:21:02,887 INFO L93 Difference]: Finished difference Result 34222 states and 34805 transitions. [2020-12-22 02:21:02,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:21:02,888 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2379 [2020-12-22 02:21:02,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:21:02,915 INFO L225 Difference]: With dead ends: 34222 [2020-12-22 02:21:02,915 INFO L226 Difference]: Without dead ends: 18428 [2020-12-22 02:21:02,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2387 GetRequests, 2380 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-22 02:21:02,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18428 states. [2020-12-22 02:21:03,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18428 to 18099. [2020-12-22 02:21:03,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18099 states. [2020-12-22 02:21:03,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18099 states to 18099 states and 18390 transitions. [2020-12-22 02:21:03,158 INFO L78 Accepts]: Start accepts. Automaton has 18099 states and 18390 transitions. Word has length 2379 [2020-12-22 02:21:03,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:21:03,159 INFO L481 AbstractCegarLoop]: Abstraction has 18099 states and 18390 transitions. [2020-12-22 02:21:03,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:21:03,159 INFO L276 IsEmpty]: Start isEmpty. Operand 18099 states and 18390 transitions. [2020-12-22 02:21:03,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2473 [2020-12-22 02:21:03,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:21:03,205 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:21:03,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:21:03,413 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:21:03,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:21:03,415 INFO L82 PathProgramCache]: Analyzing trace with hash 177034994, now seen corresponding path program 1 times [2020-12-22 02:21:03,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:21:03,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491479407] [2020-12-22 02:21:03,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:21:03,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:21:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 10448 backedges. 5006 proven. 1128 refuted. 0 times theorem prover too weak. 4314 trivial. 0 not checked. [2020-12-22 02:21:11,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491479407] [2020-12-22 02:21:11,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705441092] [2020-12-22 02:21:11,219 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 02:21:12,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:21:12,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 2844 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 02:21:12,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:21:13,464 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 02:21:19,142 INFO L134 CoverageAnalysis]: Checked inductivity of 10448 backedges. 6644 proven. 250 refuted. 0 times theorem prover too weak. 3554 trivial. 0 not checked. [2020-12-22 02:21:19,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 02:21:19,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 10 [2020-12-22 02:21:19,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239070519] [2020-12-22 02:21:19,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 02:21:19,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:21:19,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 02:21:19,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-22 02:21:19,146 INFO L87 Difference]: Start difference. First operand 18099 states and 18390 transitions. Second operand 10 states. [2020-12-22 02:21:36,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:21:36,865 INFO L93 Difference]: Finished difference Result 47750 states and 48515 transitions. [2020-12-22 02:21:36,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 02:21:36,866 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 2472 [2020-12-22 02:21:36,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:21:36,893 INFO L225 Difference]: With dead ends: 47750 [2020-12-22 02:21:36,893 INFO L226 Difference]: Without dead ends: 29982 [2020-12-22 02:21:36,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2508 GetRequests, 2483 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-12-22 02:21:36,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29982 states. [2020-12-22 02:21:37,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29982 to 19086. [2020-12-22 02:21:37,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19086 states. [2020-12-22 02:21:37,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19086 states to 19086 states and 19380 transitions. [2020-12-22 02:21:37,108 INFO L78 Accepts]: Start accepts. Automaton has 19086 states and 19380 transitions. Word has length 2472 [2020-12-22 02:21:37,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:21:37,109 INFO L481 AbstractCegarLoop]: Abstraction has 19086 states and 19380 transitions. [2020-12-22 02:21:37,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 02:21:37,109 INFO L276 IsEmpty]: Start isEmpty. Operand 19086 states and 19380 transitions. [2020-12-22 02:21:37,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2490 [2020-12-22 02:21:37,157 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:21:37,159 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:21:37,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 02:21:37,360 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:21:37,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:21:37,361 INFO L82 PathProgramCache]: Analyzing trace with hash -980972154, now seen corresponding path program 1 times [2020-12-22 02:21:37,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:21:37,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941837349] [2020-12-22 02:21:37,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:21:37,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat