/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:20:11,811 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:20:11,816 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:20:11,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:20:11,878 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:20:11,882 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:20:11,886 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:20:11,894 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:20:11,897 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:20:11,903 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:20:11,905 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:20:11,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:20:11,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:20:11,911 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:20:11,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:20:11,915 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:20:11,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:20:11,921 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:20:11,928 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:20:11,936 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:20:11,938 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:20:11,940 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:20:11,941 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:20:11,944 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:20:11,952 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:20:11,975 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:20:11,976 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:20:11,977 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:20:11,982 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:20:12,034 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:20:12,035 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:20:12,038 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:20:12,039 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:20:12,039 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:20:12,039 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:20:12,040 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:20:12,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:20:12,040 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:20:12,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:20:12,042 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:20:12,042 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:20:12,042 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:20:12,042 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:20:12,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:20:12,043 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:20:12,043 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:20:12,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:20:12,043 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:20:12,044 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:20:12,044 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:20:12,044 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:20:12,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:20:12,045 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:20:12,045 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:20:12,045 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:20:12,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:20:12,517 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:20:12,520 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:20:12,521 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:20:12,522 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:20:12,523 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:20:12,613 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85fa608de/6b12ec987ea646d48a46f66303154139/FLAG10bdd93af [2020-12-22 08:20:13,279 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:20:13,282 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:20:13,298 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85fa608de/6b12ec987ea646d48a46f66303154139/FLAG10bdd93af [2020-12-22 08:20:13,561 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85fa608de/6b12ec987ea646d48a46f66303154139 [2020-12-22 08:20:13,564 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:20:13,566 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:20:13,570 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:20:13,571 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:20:13,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:20:13,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:20:13" (1/1) ... [2020-12-22 08:20:13,577 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d1cbcd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:13, skipping insertion in model container [2020-12-22 08:20:13,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:20:13" (1/1) ... [2020-12-22 08:20:13,589 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:20:13,649 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:20:13,963 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4005,4018] [2020-12-22 08:20:14,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:20:14,050 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:20:14,123 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4005,4018] [2020-12-22 08:20:14,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:20:14,183 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:20:14,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:14 WrapperNode [2020-12-22 08:20:14,184 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:20:14,186 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:20:14,186 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:20:14,187 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:20:14,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:14" (1/1) ... [2020-12-22 08:20:14,222 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:14" (1/1) ... [2020-12-22 08:20:14,259 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:20:14,260 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:20:14,260 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:20:14,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:20:14,270 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:14" (1/1) ... [2020-12-22 08:20:14,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:14" (1/1) ... [2020-12-22 08:20:14,273 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:14" (1/1) ... [2020-12-22 08:20:14,274 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:14" (1/1) ... [2020-12-22 08:20:14,281 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:14" (1/1) ... [2020-12-22 08:20:14,286 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:14" (1/1) ... [2020-12-22 08:20:14,288 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:14" (1/1) ... [2020-12-22 08:20:14,292 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:20:14,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:20:14,294 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:20:14,294 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:20:14,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:20:14,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:20:14,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:20:14,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:20:14,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:20:15,173 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:20:15,173 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:20:15,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:20:15 BoogieIcfgContainer [2020-12-22 08:20:15,175 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:20:15,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:20:15,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:20:15,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:20:15,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:20:13" (1/3) ... [2020-12-22 08:20:15,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@223cefd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:20:15, skipping insertion in model container [2020-12-22 08:20:15,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:14" (2/3) ... [2020-12-22 08:20:15,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@223cefd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:20:15, skipping insertion in model container [2020-12-22 08:20:15,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:20:15" (3/3) ... [2020-12-22 08:20:15,184 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:20:15,192 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:20:15,198 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:20:15,220 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:20:15,248 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:20:15,248 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:20:15,248 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:20:15,248 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:20:15,248 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:20:15,248 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:20:15,249 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:20:15,249 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:20:15,265 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states. [2020-12-22 08:20:15,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 08:20:15,273 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:15,274 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:20:15,274 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:15,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:15,281 INFO L82 PathProgramCache]: Analyzing trace with hash 716810707, now seen corresponding path program 1 times [2020-12-22 08:20:15,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:15,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079145794] [2020-12-22 08:20:15,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:15,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:15,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:20:15,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079145794] [2020-12-22 08:20:15,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:15,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:20:15,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757257147] [2020-12-22 08:20:15,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:20:15,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:15,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:20:15,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:20:15,703 INFO L87 Difference]: Start difference. First operand 87 states. Second operand 3 states. [2020-12-22 08:20:15,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:15,776 INFO L93 Difference]: Finished difference Result 205 states and 324 transitions. [2020-12-22 08:20:15,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:20:15,778 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-12-22 08:20:15,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:15,791 INFO L225 Difference]: With dead ends: 205 [2020-12-22 08:20:15,791 INFO L226 Difference]: Without dead ends: 132 [2020-12-22 08:20:15,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:20:15,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-22 08:20:15,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2020-12-22 08:20:15,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-22 08:20:15,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 194 transitions. [2020-12-22 08:20:15,848 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 194 transitions. Word has length 38 [2020-12-22 08:20:15,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:15,849 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 194 transitions. [2020-12-22 08:20:15,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:20:15,849 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 194 transitions. [2020-12-22 08:20:15,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 08:20:15,851 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:15,851 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:20:15,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:20:15,852 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:15,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:15,853 INFO L82 PathProgramCache]: Analyzing trace with hash -935293361, now seen corresponding path program 1 times [2020-12-22 08:20:15,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:15,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917256483] [2020-12-22 08:20:15,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:15,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:15,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:20:15,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917256483] [2020-12-22 08:20:15,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:15,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:20:15,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826658462] [2020-12-22 08:20:15,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:20:15,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:15,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:20:15,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:20:15,957 INFO L87 Difference]: Start difference. First operand 130 states and 194 transitions. Second operand 3 states. [2020-12-22 08:20:16,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:16,006 INFO L93 Difference]: Finished difference Result 318 states and 490 transitions. [2020-12-22 08:20:16,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:20:16,007 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2020-12-22 08:20:16,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:16,010 INFO L225 Difference]: With dead ends: 318 [2020-12-22 08:20:16,010 INFO L226 Difference]: Without dead ends: 208 [2020-12-22 08:20:16,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:20:16,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-12-22 08:20:16,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 206. [2020-12-22 08:20:16,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-12-22 08:20:16,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 313 transitions. [2020-12-22 08:20:16,044 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 313 transitions. Word has length 39 [2020-12-22 08:20:16,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:16,045 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 313 transitions. [2020-12-22 08:20:16,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:20:16,045 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 313 transitions. [2020-12-22 08:20:16,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 08:20:16,047 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:16,047 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:20:16,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:20:16,048 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:16,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:16,049 INFO L82 PathProgramCache]: Analyzing trace with hash 830312666, now seen corresponding path program 1 times [2020-12-22 08:20:16,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:16,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277084178] [2020-12-22 08:20:16,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:16,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:20:16,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277084178] [2020-12-22 08:20:16,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:16,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:20:16,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99983446] [2020-12-22 08:20:16,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:20:16,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:16,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:20:16,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:20:16,225 INFO L87 Difference]: Start difference. First operand 206 states and 313 transitions. Second operand 5 states. [2020-12-22 08:20:16,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:16,403 INFO L93 Difference]: Finished difference Result 688 states and 1068 transitions. [2020-12-22 08:20:16,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:20:16,406 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2020-12-22 08:20:16,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:16,412 INFO L225 Difference]: With dead ends: 688 [2020-12-22 08:20:16,412 INFO L226 Difference]: Without dead ends: 502 [2020-12-22 08:20:16,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:20:16,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-12-22 08:20:16,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 498. [2020-12-22 08:20:16,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 498 states. [2020-12-22 08:20:16,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 769 transitions. [2020-12-22 08:20:16,513 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 769 transitions. Word has length 40 [2020-12-22 08:20:16,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:16,517 INFO L481 AbstractCegarLoop]: Abstraction has 498 states and 769 transitions. [2020-12-22 08:20:16,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:20:16,518 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 769 transitions. [2020-12-22 08:20:16,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 08:20:16,520 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:16,520 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:20:16,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:20:16,521 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:16,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:16,523 INFO L82 PathProgramCache]: Analyzing trace with hash 604365756, now seen corresponding path program 1 times [2020-12-22 08:20:16,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:16,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002606579] [2020-12-22 08:20:16,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:16,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:16,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:20:16,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002606579] [2020-12-22 08:20:16,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:16,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:20:16,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006188320] [2020-12-22 08:20:16,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:20:16,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:16,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:20:16,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:20:16,593 INFO L87 Difference]: Start difference. First operand 498 states and 769 transitions. Second operand 3 states. [2020-12-22 08:20:16,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:16,673 INFO L93 Difference]: Finished difference Result 1258 states and 1951 transitions. [2020-12-22 08:20:16,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:20:16,674 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 08:20:16,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:16,679 INFO L225 Difference]: With dead ends: 1258 [2020-12-22 08:20:16,679 INFO L226 Difference]: Without dead ends: 780 [2020-12-22 08:20:16,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:20:16,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2020-12-22 08:20:16,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 778. [2020-12-22 08:20:16,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 778 states. [2020-12-22 08:20:16,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1189 transitions. [2020-12-22 08:20:16,740 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1189 transitions. Word has length 41 [2020-12-22 08:20:16,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:16,740 INFO L481 AbstractCegarLoop]: Abstraction has 778 states and 1189 transitions. [2020-12-22 08:20:16,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:20:16,740 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1189 transitions. [2020-12-22 08:20:16,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 08:20:16,742 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:16,742 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:20:16,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:20:16,743 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:16,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:16,743 INFO L82 PathProgramCache]: Analyzing trace with hash 608060849, now seen corresponding path program 1 times [2020-12-22 08:20:16,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:16,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524681530] [2020-12-22 08:20:16,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:16,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:16,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:20:16,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524681530] [2020-12-22 08:20:16,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:16,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:20:16,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446471512] [2020-12-22 08:20:16,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:20:16,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:16,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:20:16,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:20:16,858 INFO L87 Difference]: Start difference. First operand 778 states and 1189 transitions. Second operand 5 states. [2020-12-22 08:20:17,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:17,281 INFO L93 Difference]: Finished difference Result 2066 states and 3175 transitions. [2020-12-22 08:20:17,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:20:17,281 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 08:20:17,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:17,289 INFO L225 Difference]: With dead ends: 2066 [2020-12-22 08:20:17,290 INFO L226 Difference]: Without dead ends: 1308 [2020-12-22 08:20:17,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:20:17,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2020-12-22 08:20:17,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1306. [2020-12-22 08:20:17,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1306 states. [2020-12-22 08:20:17,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 1985 transitions. [2020-12-22 08:20:17,395 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 1985 transitions. Word has length 42 [2020-12-22 08:20:17,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:17,396 INFO L481 AbstractCegarLoop]: Abstraction has 1306 states and 1985 transitions. [2020-12-22 08:20:17,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:20:17,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 1985 transitions. [2020-12-22 08:20:17,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 08:20:17,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:17,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:20:17,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:20:17,398 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:17,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:17,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1912062484, now seen corresponding path program 1 times [2020-12-22 08:20:17,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:17,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732562505] [2020-12-22 08:20:17,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:17,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:17,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:20:17,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732562505] [2020-12-22 08:20:17,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:17,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:20:17,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498358018] [2020-12-22 08:20:17,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:20:17,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:17,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:20:17,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:20:17,515 INFO L87 Difference]: Start difference. First operand 1306 states and 1985 transitions. Second operand 5 states. [2020-12-22 08:20:17,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:17,896 INFO L93 Difference]: Finished difference Result 5490 states and 8373 transitions. [2020-12-22 08:20:17,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:20:17,896 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 08:20:17,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:17,920 INFO L225 Difference]: With dead ends: 5490 [2020-12-22 08:20:17,920 INFO L226 Difference]: Without dead ends: 4204 [2020-12-22 08:20:17,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:20:17,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4204 states. [2020-12-22 08:20:18,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4204 to 2590. [2020-12-22 08:20:18,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2590 states. [2020-12-22 08:20:18,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2590 states to 2590 states and 3869 transitions. [2020-12-22 08:20:18,195 INFO L78 Accepts]: Start accepts. Automaton has 2590 states and 3869 transitions. Word has length 42 [2020-12-22 08:20:18,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:18,196 INFO L481 AbstractCegarLoop]: Abstraction has 2590 states and 3869 transitions. [2020-12-22 08:20:18,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:20:18,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2590 states and 3869 transitions. [2020-12-22 08:20:18,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 08:20:18,200 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:18,201 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:20:18,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:20:18,201 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:18,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:18,208 INFO L82 PathProgramCache]: Analyzing trace with hash 836148826, now seen corresponding path program 1 times [2020-12-22 08:20:18,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:18,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234066770] [2020-12-22 08:20:18,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:18,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:20:18,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234066770] [2020-12-22 08:20:18,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:18,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:20:18,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589364335] [2020-12-22 08:20:18,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:20:18,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:18,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:20:18,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:20:18,341 INFO L87 Difference]: Start difference. First operand 2590 states and 3869 transitions. Second operand 5 states. [2020-12-22 08:20:18,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:18,853 INFO L93 Difference]: Finished difference Result 5320 states and 7878 transitions. [2020-12-22 08:20:18,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:20:18,854 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-22 08:20:18,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:18,885 INFO L225 Difference]: With dead ends: 5320 [2020-12-22 08:20:18,885 INFO L226 Difference]: Without dead ends: 5318 [2020-12-22 08:20:18,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:20:18,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5318 states. [2020-12-22 08:20:19,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5318 to 2750. [2020-12-22 08:20:19,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2750 states. [2020-12-22 08:20:19,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2750 states to 2750 states and 4029 transitions. [2020-12-22 08:20:19,242 INFO L78 Accepts]: Start accepts. Automaton has 2750 states and 4029 transitions. Word has length 43 [2020-12-22 08:20:19,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:19,243 INFO L481 AbstractCegarLoop]: Abstraction has 2750 states and 4029 transitions. [2020-12-22 08:20:19,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:20:19,243 INFO L276 IsEmpty]: Start isEmpty. Operand 2750 states and 4029 transitions. [2020-12-22 08:20:19,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 08:20:19,243 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:19,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:20:19,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:20:19,244 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:19,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:19,245 INFO L82 PathProgramCache]: Analyzing trace with hash 161382844, now seen corresponding path program 1 times [2020-12-22 08:20:19,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:19,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086575058] [2020-12-22 08:20:19,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:19,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:19,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:20:19,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086575058] [2020-12-22 08:20:19,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:19,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:20:19,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49368993] [2020-12-22 08:20:19,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:20:19,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:19,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:20:19,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:20:19,298 INFO L87 Difference]: Start difference. First operand 2750 states and 4029 transitions. Second operand 3 states. [2020-12-22 08:20:19,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:19,666 INFO L93 Difference]: Finished difference Result 6192 states and 9053 transitions. [2020-12-22 08:20:19,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:20:19,666 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2020-12-22 08:20:19,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:19,685 INFO L225 Difference]: With dead ends: 6192 [2020-12-22 08:20:19,685 INFO L226 Difference]: Without dead ends: 3462 [2020-12-22 08:20:19,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:20:19,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3462 states. [2020-12-22 08:20:20,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3462 to 3440. [2020-12-22 08:20:20,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3440 states. [2020-12-22 08:20:20,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3440 states to 3440 states and 4983 transitions. [2020-12-22 08:20:20,074 INFO L78 Accepts]: Start accepts. Automaton has 3440 states and 4983 transitions. Word has length 44 [2020-12-22 08:20:20,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:20,076 INFO L481 AbstractCegarLoop]: Abstraction has 3440 states and 4983 transitions. [2020-12-22 08:20:20,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:20:20,076 INFO L276 IsEmpty]: Start isEmpty. Operand 3440 states and 4983 transitions. [2020-12-22 08:20:20,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:20:20,079 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:20,080 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:20:20,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:20:20,080 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:20,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:20,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1477612707, now seen corresponding path program 1 times [2020-12-22 08:20:20,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:20,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377151149] [2020-12-22 08:20:20,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:20,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:20,177 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:20:20,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377151149] [2020-12-22 08:20:20,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:20,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:20:20,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727010096] [2020-12-22 08:20:20,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:20:20,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:20,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:20:20,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:20:20,186 INFO L87 Difference]: Start difference. First operand 3440 states and 4983 transitions. Second operand 3 states. [2020-12-22 08:20:20,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:20,704 INFO L93 Difference]: Finished difference Result 8581 states and 12443 transitions. [2020-12-22 08:20:20,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:20:20,704 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 08:20:20,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:20,734 INFO L225 Difference]: With dead ends: 8581 [2020-12-22 08:20:20,734 INFO L226 Difference]: Without dead ends: 5763 [2020-12-22 08:20:20,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:20:20,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5763 states. [2020-12-22 08:20:21,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5763 to 5761. [2020-12-22 08:20:21,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5761 states. [2020-12-22 08:20:21,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5761 states to 5761 states and 8245 transitions. [2020-12-22 08:20:21,385 INFO L78 Accepts]: Start accepts. Automaton has 5761 states and 8245 transitions. Word has length 63 [2020-12-22 08:20:21,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:21,386 INFO L481 AbstractCegarLoop]: Abstraction has 5761 states and 8245 transitions. [2020-12-22 08:20:21,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:20:21,386 INFO L276 IsEmpty]: Start isEmpty. Operand 5761 states and 8245 transitions. [2020-12-22 08:20:21,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:20:21,390 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:21,390 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:20:21,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:20:21,390 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:21,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:21,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1700716252, now seen corresponding path program 1 times [2020-12-22 08:20:21,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:21,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143656145] [2020-12-22 08:20:21,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:21,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:21,661 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:20:21,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143656145] [2020-12-22 08:20:21,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327199282] [2020-12-22 08:20:21,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 08:20:21,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:21,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 08:20:21,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:20:22,075 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 08:20:22,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:20:22,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 08:20:22,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323252356] [2020-12-22 08:20:22,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 08:20:22,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:22,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 08:20:22,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-12-22 08:20:22,079 INFO L87 Difference]: Start difference. First operand 5761 states and 8245 transitions. Second operand 12 states. [2020-12-22 08:20:30,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:30,821 INFO L93 Difference]: Finished difference Result 41531 states and 58325 transitions. [2020-12-22 08:20:30,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-22 08:20:30,822 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2020-12-22 08:20:30,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:30,927 INFO L225 Difference]: With dead ends: 41531 [2020-12-22 08:20:30,928 INFO L226 Difference]: Without dead ends: 36305 [2020-12-22 08:20:30,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2815 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1361, Invalid=5949, Unknown=0, NotChecked=0, Total=7310 [2020-12-22 08:20:30,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36305 states. [2020-12-22 08:20:33,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36305 to 15555. [2020-12-22 08:20:33,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15555 states. [2020-12-22 08:20:33,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15555 states to 15555 states and 21830 transitions. [2020-12-22 08:20:33,175 INFO L78 Accepts]: Start accepts. Automaton has 15555 states and 21830 transitions. Word has length 63 [2020-12-22 08:20:33,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:33,175 INFO L481 AbstractCegarLoop]: Abstraction has 15555 states and 21830 transitions. [2020-12-22 08:20:33,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 08:20:33,175 INFO L276 IsEmpty]: Start isEmpty. Operand 15555 states and 21830 transitions. [2020-12-22 08:20:33,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:20:33,180 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:33,181 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:20:33,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 08:20:33,397 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:33,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:33,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1091273178, now seen corresponding path program 1 times [2020-12-22 08:20:33,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:33,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501730724] [2020-12-22 08:20:33,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:33,507 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 08:20:33,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501730724] [2020-12-22 08:20:33,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:33,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:20:33,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410197753] [2020-12-22 08:20:33,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:20:33,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:33,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:20:33,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:20:33,511 INFO L87 Difference]: Start difference. First operand 15555 states and 21830 transitions. Second operand 5 states. [2020-12-22 08:20:35,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:35,339 INFO L93 Difference]: Finished difference Result 28097 states and 39753 transitions. [2020-12-22 08:20:35,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:20:35,340 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 08:20:35,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:35,387 INFO L225 Difference]: With dead ends: 28097 [2020-12-22 08:20:35,388 INFO L226 Difference]: Without dead ends: 21354 [2020-12-22 08:20:35,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:20:35,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21354 states. [2020-12-22 08:20:37,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21354 to 20054. [2020-12-22 08:20:37,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20054 states. [2020-12-22 08:20:37,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20054 states to 20054 states and 28043 transitions. [2020-12-22 08:20:37,647 INFO L78 Accepts]: Start accepts. Automaton has 20054 states and 28043 transitions. Word has length 63 [2020-12-22 08:20:37,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:37,648 INFO L481 AbstractCegarLoop]: Abstraction has 20054 states and 28043 transitions. [2020-12-22 08:20:37,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:20:37,648 INFO L276 IsEmpty]: Start isEmpty. Operand 20054 states and 28043 transitions. [2020-12-22 08:20:37,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:20:37,653 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:37,654 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:20:37,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:20:37,654 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:37,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:37,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1327011341, now seen corresponding path program 1 times [2020-12-22 08:20:37,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:37,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024856913] [2020-12-22 08:20:37,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:37,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:37,705 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:20:37,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024856913] [2020-12-22 08:20:37,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:37,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:20:37,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372140448] [2020-12-22 08:20:37,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:20:37,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:37,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:20:37,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:20:37,708 INFO L87 Difference]: Start difference. First operand 20054 states and 28043 transitions. Second operand 3 states. [2020-12-22 08:20:39,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:39,791 INFO L93 Difference]: Finished difference Result 35081 states and 48957 transitions. [2020-12-22 08:20:39,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:20:39,791 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 08:20:39,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:39,839 INFO L225 Difference]: With dead ends: 35081 [2020-12-22 08:20:39,840 INFO L226 Difference]: Without dead ends: 21038 [2020-12-22 08:20:39,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:20:39,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21038 states. [2020-12-22 08:20:42,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21038 to 20161. [2020-12-22 08:20:42,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20161 states. [2020-12-22 08:20:42,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20161 states to 20161 states and 27701 transitions. [2020-12-22 08:20:42,058 INFO L78 Accepts]: Start accepts. Automaton has 20161 states and 27701 transitions. Word has length 63 [2020-12-22 08:20:42,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:42,058 INFO L481 AbstractCegarLoop]: Abstraction has 20161 states and 27701 transitions. [2020-12-22 08:20:42,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:20:42,058 INFO L276 IsEmpty]: Start isEmpty. Operand 20161 states and 27701 transitions. [2020-12-22 08:20:42,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:20:42,063 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:42,063 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:20:42,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:20:42,064 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:42,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:42,064 INFO L82 PathProgramCache]: Analyzing trace with hash 161019487, now seen corresponding path program 1 times [2020-12-22 08:20:42,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:42,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127903936] [2020-12-22 08:20:42,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:42,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:42,167 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 08:20:42,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127903936] [2020-12-22 08:20:42,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:42,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:20:42,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776752233] [2020-12-22 08:20:42,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:20:42,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:42,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:20:42,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:20:42,170 INFO L87 Difference]: Start difference. First operand 20161 states and 27701 transitions. Second operand 6 states. [2020-12-22 08:20:46,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:46,654 INFO L93 Difference]: Finished difference Result 69070 states and 94356 transitions. [2020-12-22 08:20:46,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:20:46,654 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2020-12-22 08:20:46,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:46,728 INFO L225 Difference]: With dead ends: 69070 [2020-12-22 08:20:46,729 INFO L226 Difference]: Without dead ends: 48996 [2020-12-22 08:20:46,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:20:46,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48996 states. [2020-12-22 08:20:51,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48996 to 48596. [2020-12-22 08:20:51,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48596 states. [2020-12-22 08:20:51,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48596 states to 48596 states and 66040 transitions. [2020-12-22 08:20:51,385 INFO L78 Accepts]: Start accepts. Automaton has 48596 states and 66040 transitions. Word has length 63 [2020-12-22 08:20:51,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:51,389 INFO L481 AbstractCegarLoop]: Abstraction has 48596 states and 66040 transitions. [2020-12-22 08:20:51,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:20:51,390 INFO L276 IsEmpty]: Start isEmpty. Operand 48596 states and 66040 transitions. [2020-12-22 08:20:51,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:20:51,394 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:51,395 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:20:51,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:20:51,395 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:51,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:51,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1235936444, now seen corresponding path program 1 times [2020-12-22 08:20:51,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:51,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721960462] [2020-12-22 08:20:51,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:51,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:51,478 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 08:20:51,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721960462] [2020-12-22 08:20:51,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:51,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:20:51,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114980558] [2020-12-22 08:20:51,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:20:51,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:51,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:20:51,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:20:51,481 INFO L87 Difference]: Start difference. First operand 48596 states and 66040 transitions. Second operand 5 states. [2020-12-22 08:20:56,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:56,666 INFO L93 Difference]: Finished difference Result 68228 states and 93709 transitions. [2020-12-22 08:20:56,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:20:56,666 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 08:20:56,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:56,748 INFO L225 Difference]: With dead ends: 68228 [2020-12-22 08:20:56,749 INFO L226 Difference]: Without dead ends: 61215 [2020-12-22 08:20:56,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:20:56,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61215 states. [2020-12-22 08:21:01,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61215 to 55399. [2020-12-22 08:21:01,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55399 states. [2020-12-22 08:21:01,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55399 states to 55399 states and 75461 transitions. [2020-12-22 08:21:01,891 INFO L78 Accepts]: Start accepts. Automaton has 55399 states and 75461 transitions. Word has length 63 [2020-12-22 08:21:01,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:01,891 INFO L481 AbstractCegarLoop]: Abstraction has 55399 states and 75461 transitions. [2020-12-22 08:21:01,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:21:01,892 INFO L276 IsEmpty]: Start isEmpty. Operand 55399 states and 75461 transitions. [2020-12-22 08:21:01,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:21:01,897 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:01,897 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:21:01,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:21:01,897 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:01,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:01,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1004794437, now seen corresponding path program 1 times [2020-12-22 08:21:01,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:01,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470332306] [2020-12-22 08:21:01,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:01,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:01,940 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:21:01,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470332306] [2020-12-22 08:21:01,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:01,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:21:01,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341129289] [2020-12-22 08:21:01,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:21:01,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:01,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:21:01,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:21:01,942 INFO L87 Difference]: Start difference. First operand 55399 states and 75461 transitions. Second operand 3 states. [2020-12-22 08:21:06,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:06,738 INFO L93 Difference]: Finished difference Result 77867 states and 105572 transitions. [2020-12-22 08:21:06,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:21:06,739 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 08:21:06,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:06,805 INFO L225 Difference]: With dead ends: 77867 [2020-12-22 08:21:06,806 INFO L226 Difference]: Without dead ends: 49438 [2020-12-22 08:21:06,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:21:06,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49438 states. [2020-12-22 08:21:11,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49438 to 44099. [2020-12-22 08:21:11,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44099 states. [2020-12-22 08:21:11,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44099 states to 44099 states and 59293 transitions. [2020-12-22 08:21:11,141 INFO L78 Accepts]: Start accepts. Automaton has 44099 states and 59293 transitions. Word has length 64 [2020-12-22 08:21:11,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:11,142 INFO L481 AbstractCegarLoop]: Abstraction has 44099 states and 59293 transitions. [2020-12-22 08:21:11,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:21:11,142 INFO L276 IsEmpty]: Start isEmpty. Operand 44099 states and 59293 transitions. [2020-12-22 08:21:11,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:21:11,147 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:11,147 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:21:11,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:21:11,148 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:11,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:11,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1607670003, now seen corresponding path program 1 times [2020-12-22 08:21:11,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:11,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312733199] [2020-12-22 08:21:11,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:11,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 08:21:11,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312733199] [2020-12-22 08:21:11,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:11,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:21:11,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155825170] [2020-12-22 08:21:11,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:21:11,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:11,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:21:11,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:21:11,219 INFO L87 Difference]: Start difference. First operand 44099 states and 59293 transitions. Second operand 5 states. [2020-12-22 08:21:15,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:15,957 INFO L93 Difference]: Finished difference Result 57440 states and 77739 transitions. [2020-12-22 08:21:15,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:21:15,958 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-12-22 08:21:15,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:16,011 INFO L225 Difference]: With dead ends: 57440 [2020-12-22 08:21:16,011 INFO L226 Difference]: Without dead ends: 50725 [2020-12-22 08:21:16,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:21:16,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50725 states. [2020-12-22 08:21:20,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50725 to 48655. [2020-12-22 08:21:20,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48655 states. [2020-12-22 08:21:20,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48655 states to 48655 states and 65328 transitions. [2020-12-22 08:21:20,642 INFO L78 Accepts]: Start accepts. Automaton has 48655 states and 65328 transitions. Word has length 65 [2020-12-22 08:21:20,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:20,642 INFO L481 AbstractCegarLoop]: Abstraction has 48655 states and 65328 transitions. [2020-12-22 08:21:20,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:21:20,642 INFO L276 IsEmpty]: Start isEmpty. Operand 48655 states and 65328 transitions. [2020-12-22 08:21:20,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 08:21:20,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:20,648 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:21:20,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:21:20,648 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:20,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:20,649 INFO L82 PathProgramCache]: Analyzing trace with hash 254858913, now seen corresponding path program 1 times [2020-12-22 08:21:20,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:20,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102869733] [2020-12-22 08:21:20,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:20,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:20,706 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:21:20,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102869733] [2020-12-22 08:21:20,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:20,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:21:20,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284311546] [2020-12-22 08:21:20,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:21:20,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:20,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:21:20,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:21:20,708 INFO L87 Difference]: Start difference. First operand 48655 states and 65328 transitions. Second operand 3 states. [2020-12-22 08:21:27,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:27,145 INFO L93 Difference]: Finished difference Result 103924 states and 139378 transitions. [2020-12-22 08:21:27,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:21:27,146 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 08:21:27,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:27,215 INFO L225 Difference]: With dead ends: 103924 [2020-12-22 08:21:27,215 INFO L226 Difference]: Without dead ends: 67747 [2020-12-22 08:21:27,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:21:27,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67747 states. [2020-12-22 08:21:33,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67747 to 67745. [2020-12-22 08:21:33,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67745 states. [2020-12-22 08:21:33,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67745 states to 67745 states and 89604 transitions. [2020-12-22 08:21:33,712 INFO L78 Accepts]: Start accepts. Automaton has 67745 states and 89604 transitions. Word has length 66 [2020-12-22 08:21:33,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:33,712 INFO L481 AbstractCegarLoop]: Abstraction has 67745 states and 89604 transitions. [2020-12-22 08:21:33,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:21:33,712 INFO L276 IsEmpty]: Start isEmpty. Operand 67745 states and 89604 transitions. [2020-12-22 08:21:33,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:21:33,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:33,721 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:21:33,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:21:33,721 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:33,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:33,722 INFO L82 PathProgramCache]: Analyzing trace with hash -2033011702, now seen corresponding path program 1 times [2020-12-22 08:21:33,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:33,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208614283] [2020-12-22 08:21:33,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:33,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:33,783 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 08:21:33,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208614283] [2020-12-22 08:21:33,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:33,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:21:33,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114643546] [2020-12-22 08:21:33,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:21:33,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:33,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:21:33,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:21:33,786 INFO L87 Difference]: Start difference. First operand 67745 states and 89604 transitions. Second operand 6 states. [2020-12-22 08:21:49,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:49,897 INFO L93 Difference]: Finished difference Result 227346 states and 299070 transitions. [2020-12-22 08:21:49,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:21:49,897 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-12-22 08:21:49,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:50,305 INFO L225 Difference]: With dead ends: 227346 [2020-12-22 08:21:50,305 INFO L226 Difference]: Without dead ends: 159658 [2020-12-22 08:21:50,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:21:50,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159658 states. [2020-12-22 08:22:06,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159658 to 158389. [2020-12-22 08:22:06,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158389 states. [2020-12-22 08:22:06,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158389 states to 158389 states and 207061 transitions. [2020-12-22 08:22:06,863 INFO L78 Accepts]: Start accepts. Automaton has 158389 states and 207061 transitions. Word has length 68 [2020-12-22 08:22:06,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:22:06,863 INFO L481 AbstractCegarLoop]: Abstraction has 158389 states and 207061 transitions. [2020-12-22 08:22:06,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:22:06,864 INFO L276 IsEmpty]: Start isEmpty. Operand 158389 states and 207061 transitions. [2020-12-22 08:22:06,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:22:06,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:22:06,873 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:22:06,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 08:22:06,873 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:22:06,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:22:06,874 INFO L82 PathProgramCache]: Analyzing trace with hash -767181137, now seen corresponding path program 1 times [2020-12-22 08:22:06,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:22:06,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737236547] [2020-12-22 08:22:06,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:22:06,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:22:06,955 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:22:06,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737236547] [2020-12-22 08:22:06,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63326298] [2020-12-22 08:22:06,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 08:22:07,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:22:07,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 08:22:07,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:22:07,245 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:22:07,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:22:07,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-22 08:22:07,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367880230] [2020-12-22 08:22:07,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 08:22:07,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:22:07,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 08:22:07,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-22 08:22:07,249 INFO L87 Difference]: Start difference. First operand 158389 states and 207061 transitions. Second operand 11 states. [2020-12-22 08:22:41,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:22:41,128 INFO L93 Difference]: Finished difference Result 404014 states and 527073 transitions. [2020-12-22 08:22:41,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:22:41,129 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2020-12-22 08:22:41,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:22:41,659 INFO L225 Difference]: With dead ends: 404014 [2020-12-22 08:22:41,659 INFO L226 Difference]: Without dead ends: 287823 [2020-12-22 08:22:41,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-12-22 08:22:42,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287823 states.