/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.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:21:09,075 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:21:09,079 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:21:09,135 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:21:09,135 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:21:09,141 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:21:09,145 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:21:09,154 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:21:09,166 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:21:09,170 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:21:09,171 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:21:09,177 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:21:09,178 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:21:09,180 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:21:09,181 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:21:09,183 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:21:09,184 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:21:09,187 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:21:09,194 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:21:09,201 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:21:09,205 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:21:09,206 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:21:09,208 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:21:09,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:21:09,213 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:21:09,218 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:21:09,219 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:21:09,221 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:21:09,222 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:21:09,223 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:21:09,223 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:21:09,224 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:21:09,224 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:21:09,224 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:21:09,225 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:21:09,226 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:21:09,227 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:21:09,279 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:21:09,279 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:21:09,285 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:21:09,285 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:21:09,286 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:21:09,286 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:21:09,286 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:21:09,286 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:21:09,286 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:21:09,287 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:21:09,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:21:09,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:21:09,288 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:21:09,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:21:09,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:21:09,289 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:21:09,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:21:09,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:21:09,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:21:09,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:21:09,290 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:21:09,290 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:21:09,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:21:09,291 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:21:09,291 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:21:09,291 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:21:09,670 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:21:09,713 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:21:09,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:21:09,718 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:21:09,719 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:21:09,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-12-22 08:21:09,810 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/157145598/5c55980b115747af84ea993e8ae9fd49/FLAG14f8f92e7 [2020-12-22 08:21:10,630 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:21:10,630 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-12-22 08:21:10,651 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/157145598/5c55980b115747af84ea993e8ae9fd49/FLAG14f8f92e7 [2020-12-22 08:21:10,919 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/157145598/5c55980b115747af84ea993e8ae9fd49 [2020-12-22 08:21:10,922 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:21:10,925 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:21:10,930 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:21:10,930 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:21:10,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:21:10,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:21:10" (1/1) ... [2020-12-22 08:21:10,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b11aa13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:10, skipping insertion in model container [2020-12-22 08:21:10,937 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:21:10" (1/1) ... [2020-12-22 08:21:10,946 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:21:11,001 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:21:11,208 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.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[4935,4948] [2020-12-22 08:21:11,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:21:11,315 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:21:11,371 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.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[4935,4948] [2020-12-22 08:21:11,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:21:11,421 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:21:11,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:11 WrapperNode [2020-12-22 08:21:11,422 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:21:11,424 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:21:11,424 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:21:11,424 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:21:11,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:11" (1/1) ... [2020-12-22 08:21:11,448 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:11" (1/1) ... [2020-12-22 08:21:11,506 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:21:11,509 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:21:11,509 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:21:11,509 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:21:11,523 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:11" (1/1) ... [2020-12-22 08:21:11,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:11" (1/1) ... [2020-12-22 08:21:11,543 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:11" (1/1) ... [2020-12-22 08:21:11,543 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:11" (1/1) ... [2020-12-22 08:21:11,563 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:11" (1/1) ... [2020-12-22 08:21:11,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:11" (1/1) ... [2020-12-22 08:21:11,586 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:11" (1/1) ... [2020-12-22 08:21:11,596 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:21:11,598 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:21:11,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:21:11,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:21:11,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:11" (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 08:21:11,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:21:11,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:21:11,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:21:11,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:21:12,642 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:21:12,642 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:21:12,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:21:12 BoogieIcfgContainer [2020-12-22 08:21:12,644 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:21:12,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:21:12,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:21:12,650 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:21:12,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:21:10" (1/3) ... [2020-12-22 08:21:12,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d77763a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:21:12, skipping insertion in model container [2020-12-22 08:21:12,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:11" (2/3) ... [2020-12-22 08:21:12,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d77763a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:21:12, skipping insertion in model container [2020-12-22 08:21:12,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:21:12" (3/3) ... [2020-12-22 08:21:12,656 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-12-22 08:21:12,663 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:21:12,668 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:21:12,690 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:21:12,727 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:21:12,728 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:21:12,728 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:21:12,728 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:21:12,728 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:21:12,728 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:21:12,728 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:21:12,729 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:21:12,747 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states. [2020-12-22 08:21:12,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 08:21:12,756 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:12,757 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:21:12,758 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:12,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:12,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1289871298, now seen corresponding path program 1 times [2020-12-22 08:21:12,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:12,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920062078] [2020-12-22 08:21:12,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:12,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:13,106 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 08:21:13,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920062078] [2020-12-22 08:21:13,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:13,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:21:13,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60989519] [2020-12-22 08:21:13,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:21:13,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:13,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:21:13,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:21:13,132 INFO L87 Difference]: Start difference. First operand 110 states. Second operand 3 states. [2020-12-22 08:21:13,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:13,215 INFO L93 Difference]: Finished difference Result 260 states and 419 transitions. [2020-12-22 08:21:13,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:21:13,217 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-12-22 08:21:13,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:13,232 INFO L225 Difference]: With dead ends: 260 [2020-12-22 08:21:13,232 INFO L226 Difference]: Without dead ends: 171 [2020-12-22 08:21:13,236 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 08:21:13,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-12-22 08:21:13,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2020-12-22 08:21:13,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-12-22 08:21:13,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 253 transitions. [2020-12-22 08:21:13,303 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 253 transitions. Word has length 48 [2020-12-22 08:21:13,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:13,304 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 253 transitions. [2020-12-22 08:21:13,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:21:13,305 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 253 transitions. [2020-12-22 08:21:13,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 08:21:13,307 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:13,307 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:21:13,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:21:13,308 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:13,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:13,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1971653998, now seen corresponding path program 1 times [2020-12-22 08:21:13,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:13,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157148399] [2020-12-22 08:21:13,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:13,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:13,517 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 08:21:13,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157148399] [2020-12-22 08:21:13,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:13,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:21:13,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172370696] [2020-12-22 08:21:13,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:21:13,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:13,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:21:13,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:21:13,522 INFO L87 Difference]: Start difference. First operand 169 states and 253 transitions. Second operand 3 states. [2020-12-22 08:21:13,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:13,584 INFO L93 Difference]: Finished difference Result 421 states and 653 transitions. [2020-12-22 08:21:13,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:21:13,589 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 49 [2020-12-22 08:21:13,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:13,592 INFO L225 Difference]: With dead ends: 421 [2020-12-22 08:21:13,592 INFO L226 Difference]: Without dead ends: 279 [2020-12-22 08:21:13,597 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 08:21:13,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-12-22 08:21:13,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 277. [2020-12-22 08:21:13,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-12-22 08:21:13,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 424 transitions. [2020-12-22 08:21:13,673 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 424 transitions. Word has length 49 [2020-12-22 08:21:13,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:13,673 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 424 transitions. [2020-12-22 08:21:13,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:21:13,674 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 424 transitions. [2020-12-22 08:21:13,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 08:21:13,678 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:13,678 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:21:13,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:21:13,678 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:13,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:13,680 INFO L82 PathProgramCache]: Analyzing trace with hash 663495285, now seen corresponding path program 1 times [2020-12-22 08:21:13,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:13,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692557958] [2020-12-22 08:21:13,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:13,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:13,811 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 08:21:13,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692557958] [2020-12-22 08:21:13,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:13,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:21:13,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137099892] [2020-12-22 08:21:13,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:21:13,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:13,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:21:13,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:21:13,818 INFO L87 Difference]: Start difference. First operand 277 states and 424 transitions. Second operand 3 states. [2020-12-22 08:21:13,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:13,928 INFO L93 Difference]: Finished difference Result 713 states and 1114 transitions. [2020-12-22 08:21:13,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:21:13,931 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-12-22 08:21:13,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:13,939 INFO L225 Difference]: With dead ends: 713 [2020-12-22 08:21:13,939 INFO L226 Difference]: Without dead ends: 463 [2020-12-22 08:21:13,943 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 08:21:13,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2020-12-22 08:21:14,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 461. [2020-12-22 08:21:14,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 461 states. [2020-12-22 08:21:14,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 712 transitions. [2020-12-22 08:21:14,020 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 712 transitions. Word has length 50 [2020-12-22 08:21:14,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:14,021 INFO L481 AbstractCegarLoop]: Abstraction has 461 states and 712 transitions. [2020-12-22 08:21:14,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:21:14,021 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 712 transitions. [2020-12-22 08:21:14,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 08:21:14,023 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:14,023 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:21:14,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:21:14,024 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:14,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:14,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1706895887, now seen corresponding path program 1 times [2020-12-22 08:21:14,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:14,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241394381] [2020-12-22 08:21:14,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:14,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:14,102 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 08:21:14,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241394381] [2020-12-22 08:21:14,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:14,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:21:14,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257451775] [2020-12-22 08:21:14,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:21:14,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:14,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:21:14,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:21:14,105 INFO L87 Difference]: Start difference. First operand 461 states and 712 transitions. Second operand 3 states. [2020-12-22 08:21:14,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:14,166 INFO L93 Difference]: Finished difference Result 1201 states and 1874 transitions. [2020-12-22 08:21:14,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:21:14,167 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-12-22 08:21:14,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:14,172 INFO L225 Difference]: With dead ends: 1201 [2020-12-22 08:21:14,172 INFO L226 Difference]: Without dead ends: 767 [2020-12-22 08:21:14,174 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 08:21:14,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2020-12-22 08:21:14,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 765. [2020-12-22 08:21:14,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 765 states. [2020-12-22 08:21:14,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 1180 transitions. [2020-12-22 08:21:14,228 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 1180 transitions. Word has length 51 [2020-12-22 08:21:14,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:14,229 INFO L481 AbstractCegarLoop]: Abstraction has 765 states and 1180 transitions. [2020-12-22 08:21:14,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:21:14,229 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 1180 transitions. [2020-12-22 08:21:14,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 08:21:14,230 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:14,231 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:21:14,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:21:14,231 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:14,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:14,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1133800764, now seen corresponding path program 1 times [2020-12-22 08:21:14,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:14,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735466336] [2020-12-22 08:21:14,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:14,391 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 08:21:14,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735466336] [2020-12-22 08:21:14,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:14,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:21:14,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061244029] [2020-12-22 08:21:14,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:21:14,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:14,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:21:14,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:21:14,394 INFO L87 Difference]: Start difference. First operand 765 states and 1180 transitions. Second operand 6 states. [2020-12-22 08:21:14,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:14,668 INFO L93 Difference]: Finished difference Result 3269 states and 5056 transitions. [2020-12-22 08:21:14,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:21:14,669 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-22 08:21:14,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:14,684 INFO L225 Difference]: With dead ends: 3269 [2020-12-22 08:21:14,684 INFO L226 Difference]: Without dead ends: 2531 [2020-12-22 08:21:14,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:21:14,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2531 states. [2020-12-22 08:21:14,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2531 to 2525. [2020-12-22 08:21:14,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2525 states. [2020-12-22 08:21:14,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2525 states to 2525 states and 3884 transitions. [2020-12-22 08:21:14,925 INFO L78 Accepts]: Start accepts. Automaton has 2525 states and 3884 transitions. Word has length 52 [2020-12-22 08:21:14,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:14,927 INFO L481 AbstractCegarLoop]: Abstraction has 2525 states and 3884 transitions. [2020-12-22 08:21:14,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:21:14,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2525 states and 3884 transitions. [2020-12-22 08:21:14,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:21:14,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:14,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:21:14,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:21:14,935 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:14,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:14,935 INFO L82 PathProgramCache]: Analyzing trace with hash -2135389787, now seen corresponding path program 1 times [2020-12-22 08:21:14,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:14,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159590752] [2020-12-22 08:21:14,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:14,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:15,027 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 08:21:15,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159590752] [2020-12-22 08:21:15,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:15,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:21:15,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482727698] [2020-12-22 08:21:15,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:21:15,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:15,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:21:15,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:21:15,030 INFO L87 Difference]: Start difference. First operand 2525 states and 3884 transitions. Second operand 5 states. [2020-12-22 08:21:15,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:15,747 INFO L93 Difference]: Finished difference Result 7521 states and 11598 transitions. [2020-12-22 08:21:15,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:21:15,748 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-12-22 08:21:15,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:15,776 INFO L225 Difference]: With dead ends: 7521 [2020-12-22 08:21:15,776 INFO L226 Difference]: Without dead ends: 5023 [2020-12-22 08:21:15,781 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 08:21:15,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5023 states. [2020-12-22 08:21:16,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5023 to 5021. [2020-12-22 08:21:16,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5021 states. [2020-12-22 08:21:16,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5021 states to 5021 states and 7684 transitions. [2020-12-22 08:21:16,277 INFO L78 Accepts]: Start accepts. Automaton has 5021 states and 7684 transitions. Word has length 54 [2020-12-22 08:21:16,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:16,277 INFO L481 AbstractCegarLoop]: Abstraction has 5021 states and 7684 transitions. [2020-12-22 08:21:16,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:21:16,277 INFO L276 IsEmpty]: Start isEmpty. Operand 5021 states and 7684 transitions. [2020-12-22 08:21:16,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:21:16,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:16,279 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:21:16,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:21:16,279 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:16,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:16,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1662484042, now seen corresponding path program 1 times [2020-12-22 08:21:16,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:16,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6174035] [2020-12-22 08:21:16,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:16,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:16,440 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 08:21:16,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6174035] [2020-12-22 08:21:16,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:16,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:21:16,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808986798] [2020-12-22 08:21:16,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:21:16,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:16,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:21:16,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:21:16,443 INFO L87 Difference]: Start difference. First operand 5021 states and 7684 transitions. Second operand 6 states. [2020-12-22 08:21:17,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:17,869 INFO L93 Difference]: Finished difference Result 22983 states and 35225 transitions. [2020-12-22 08:21:17,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:21:17,870 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 08:21:17,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:17,967 INFO L225 Difference]: With dead ends: 22983 [2020-12-22 08:21:17,967 INFO L226 Difference]: Without dead ends: 17989 [2020-12-22 08:21:17,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:21:18,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17989 states. [2020-12-22 08:21:18,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17989 to 10013. [2020-12-22 08:21:18,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10013 states. [2020-12-22 08:21:19,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10013 states to 10013 states and 15084 transitions. [2020-12-22 08:21:19,011 INFO L78 Accepts]: Start accepts. Automaton has 10013 states and 15084 transitions. Word has length 54 [2020-12-22 08:21:19,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:19,012 INFO L481 AbstractCegarLoop]: Abstraction has 10013 states and 15084 transitions. [2020-12-22 08:21:19,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:21:19,013 INFO L276 IsEmpty]: Start isEmpty. Operand 10013 states and 15084 transitions. [2020-12-22 08:21:19,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 08:21:19,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:19,015 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:21:19,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:21:19,015 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:19,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:19,017 INFO L82 PathProgramCache]: Analyzing trace with hash -22058530, now seen corresponding path program 1 times [2020-12-22 08:21:19,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:19,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572321498] [2020-12-22 08:21:19,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:19,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:19,139 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 08:21:19,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572321498] [2020-12-22 08:21:19,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:19,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:21:19,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745243866] [2020-12-22 08:21:19,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:21:19,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:19,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:21:19,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:21:19,142 INFO L87 Difference]: Start difference. First operand 10013 states and 15084 transitions. Second operand 5 states. [2020-12-22 08:21:20,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:20,775 INFO L93 Difference]: Finished difference Result 20511 states and 30653 transitions. [2020-12-22 08:21:20,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:21:20,776 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 08:21:20,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:20,831 INFO L225 Difference]: With dead ends: 20511 [2020-12-22 08:21:20,831 INFO L226 Difference]: Without dead ends: 20509 [2020-12-22 08:21:20,839 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 08:21:20,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20509 states. [2020-12-22 08:21:21,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20509 to 10525. [2020-12-22 08:21:21,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10525 states. [2020-12-22 08:21:21,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10525 states to 10525 states and 15596 transitions. [2020-12-22 08:21:21,971 INFO L78 Accepts]: Start accepts. Automaton has 10525 states and 15596 transitions. Word has length 55 [2020-12-22 08:21:21,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:21,972 INFO L481 AbstractCegarLoop]: Abstraction has 10525 states and 15596 transitions. [2020-12-22 08:21:21,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:21:21,972 INFO L276 IsEmpty]: Start isEmpty. Operand 10525 states and 15596 transitions. [2020-12-22 08:21:21,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 08:21:21,973 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:21,973 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:21:21,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:21:21,974 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:21,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:21,974 INFO L82 PathProgramCache]: Analyzing trace with hash -673241382, now seen corresponding path program 1 times [2020-12-22 08:21:21,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:21,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060717463] [2020-12-22 08:21:21,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:21,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:22,051 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 08:21:22,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060717463] [2020-12-22 08:21:22,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:22,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:21:22,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889193453] [2020-12-22 08:21:22,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:21:22,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:22,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:21:22,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:21:22,061 INFO L87 Difference]: Start difference. First operand 10525 states and 15596 transitions. Second operand 3 states. [2020-12-22 08:21:23,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:23,249 INFO L93 Difference]: Finished difference Result 23387 states and 34588 transitions. [2020-12-22 08:21:23,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:21:23,254 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-12-22 08:21:23,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:23,291 INFO L225 Difference]: With dead ends: 23387 [2020-12-22 08:21:23,291 INFO L226 Difference]: Without dead ends: 12889 [2020-12-22 08:21:23,308 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 08:21:23,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12889 states. [2020-12-22 08:21:24,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12889 to 12887. [2020-12-22 08:21:24,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12887 states. [2020-12-22 08:21:24,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12887 states to 12887 states and 18962 transitions. [2020-12-22 08:21:24,542 INFO L78 Accepts]: Start accepts. Automaton has 12887 states and 18962 transitions. Word has length 56 [2020-12-22 08:21:24,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:24,542 INFO L481 AbstractCegarLoop]: Abstraction has 12887 states and 18962 transitions. [2020-12-22 08:21:24,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:21:24,542 INFO L276 IsEmpty]: Start isEmpty. Operand 12887 states and 18962 transitions. [2020-12-22 08:21:24,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 08:21:24,549 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:24,550 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:21:24,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:21:24,550 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:24,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:24,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1821600213, now seen corresponding path program 1 times [2020-12-22 08:21:24,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:24,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746200835] [2020-12-22 08:21:24,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:24,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 08:21:24,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746200835] [2020-12-22 08:21:24,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683507305] [2020-12-22 08:21:24,680 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 08:21:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:24,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 08:21:24,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:21:25,036 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 08:21:25,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:21:25,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-22 08:21:25,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798547249] [2020-12-22 08:21:25,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:21:25,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:25,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:21:25,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:21:25,039 INFO L87 Difference]: Start difference. First operand 12887 states and 18962 transitions. Second operand 7 states. [2020-12-22 08:21:26,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:26,782 INFO L93 Difference]: Finished difference Result 33579 states and 49469 transitions. [2020-12-22 08:21:26,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:21:26,783 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 77 [2020-12-22 08:21:26,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:26,838 INFO L225 Difference]: With dead ends: 33579 [2020-12-22 08:21:26,838 INFO L226 Difference]: Without dead ends: 23081 [2020-12-22 08:21:26,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:21:26,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23081 states. [2020-12-22 08:21:28,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23081 to 22047. [2020-12-22 08:21:28,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22047 states. [2020-12-22 08:21:28,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22047 states to 22047 states and 32162 transitions. [2020-12-22 08:21:28,624 INFO L78 Accepts]: Start accepts. Automaton has 22047 states and 32162 transitions. Word has length 77 [2020-12-22 08:21:28,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:28,625 INFO L481 AbstractCegarLoop]: Abstraction has 22047 states and 32162 transitions. [2020-12-22 08:21:28,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:21:28,625 INFO L276 IsEmpty]: Start isEmpty. Operand 22047 states and 32162 transitions. [2020-12-22 08:21:28,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 08:21:28,633 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:28,634 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:21:28,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 08:21:28,850 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:28,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:28,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1365606455, now seen corresponding path program 1 times [2020-12-22 08:21:28,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:28,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715465920] [2020-12-22 08:21:28,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:28,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:28,915 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 08:21:28,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715465920] [2020-12-22 08:21:28,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:28,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:21:28,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066301561] [2020-12-22 08:21:28,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:21:28,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:28,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:21:28,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:21:28,918 INFO L87 Difference]: Start difference. First operand 22047 states and 32162 transitions. Second operand 3 states. [2020-12-22 08:21:31,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:31,081 INFO L93 Difference]: Finished difference Result 52696 states and 76724 transitions. [2020-12-22 08:21:31,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:21:31,082 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 08:21:31,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:31,172 INFO L225 Difference]: With dead ends: 52696 [2020-12-22 08:21:31,172 INFO L226 Difference]: Without dead ends: 34862 [2020-12-22 08:21:31,204 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 08:21:31,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34862 states. [2020-12-22 08:21:33,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34862 to 33436. [2020-12-22 08:21:33,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33436 states. [2020-12-22 08:21:33,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33436 states to 33436 states and 48200 transitions. [2020-12-22 08:21:33,931 INFO L78 Accepts]: Start accepts. Automaton has 33436 states and 48200 transitions. Word has length 78 [2020-12-22 08:21:33,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:33,931 INFO L481 AbstractCegarLoop]: Abstraction has 33436 states and 48200 transitions. [2020-12-22 08:21:33,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:21:33,932 INFO L276 IsEmpty]: Start isEmpty. Operand 33436 states and 48200 transitions. [2020-12-22 08:21:33,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 08:21:33,940 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:33,940 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:21:33,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:21:33,941 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:33,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:33,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1977851660, now seen corresponding path program 1 times [2020-12-22 08:21:33,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:33,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578595546] [2020-12-22 08:21:33,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:33,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:33,993 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 08:21:33,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578595546] [2020-12-22 08:21:33,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:33,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:21:33,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543267795] [2020-12-22 08:21:33,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:21:33,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:33,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:21:33,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:21:33,996 INFO L87 Difference]: Start difference. First operand 33436 states and 48200 transitions. Second operand 3 states. [2020-12-22 08:21:37,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:37,089 INFO L93 Difference]: Finished difference Result 70654 states and 101391 transitions. [2020-12-22 08:21:37,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:21:37,090 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 08:21:37,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:37,197 INFO L225 Difference]: With dead ends: 70654 [2020-12-22 08:21:37,197 INFO L226 Difference]: Without dead ends: 47596 [2020-12-22 08:21:37,230 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 08:21:37,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47596 states. [2020-12-22 08:21:40,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47596 to 45522. [2020-12-22 08:21:40,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45522 states. [2020-12-22 08:21:40,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45522 states to 45522 states and 64685 transitions. [2020-12-22 08:21:40,569 INFO L78 Accepts]: Start accepts. Automaton has 45522 states and 64685 transitions. Word has length 78 [2020-12-22 08:21:40,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:40,569 INFO L481 AbstractCegarLoop]: Abstraction has 45522 states and 64685 transitions. [2020-12-22 08:21:40,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:21:40,570 INFO L276 IsEmpty]: Start isEmpty. Operand 45522 states and 64685 transitions. [2020-12-22 08:21:40,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 08:21:40,582 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:40,583 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:21:40,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:21:40,583 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:40,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:40,584 INFO L82 PathProgramCache]: Analyzing trace with hash 440432859, now seen corresponding path program 1 times [2020-12-22 08:21:40,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:40,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109240673] [2020-12-22 08:21:40,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:40,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:40,634 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 08:21:40,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109240673] [2020-12-22 08:21:40,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:40,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:21:40,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115804846] [2020-12-22 08:21:40,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:21:40,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:40,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:21:40,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:21:40,637 INFO L87 Difference]: Start difference. First operand 45522 states and 64685 transitions. Second operand 3 states. [2020-12-22 08:21:44,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:44,292 INFO L93 Difference]: Finished difference Result 75065 states and 106010 transitions. [2020-12-22 08:21:44,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:21:44,293 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 08:21:44,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:44,377 INFO L225 Difference]: With dead ends: 75065 [2020-12-22 08:21:44,377 INFO L226 Difference]: Without dead ends: 47573 [2020-12-22 08:21:44,414 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 08:21:44,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47573 states. [2020-12-22 08:21:47,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47573 to 45737. [2020-12-22 08:21:47,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45737 states. [2020-12-22 08:21:47,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45737 states to 45737 states and 63951 transitions. [2020-12-22 08:21:47,692 INFO L78 Accepts]: Start accepts. Automaton has 45737 states and 63951 transitions. Word has length 78 [2020-12-22 08:21:47,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:47,692 INFO L481 AbstractCegarLoop]: Abstraction has 45737 states and 63951 transitions. [2020-12-22 08:21:47,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:21:47,692 INFO L276 IsEmpty]: Start isEmpty. Operand 45737 states and 63951 transitions. [2020-12-22 08:21:47,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 08:21:47,702 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:47,702 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:21:47,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:21:47,702 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:47,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:47,703 INFO L82 PathProgramCache]: Analyzing trace with hash -739881820, now seen corresponding path program 1 times [2020-12-22 08:21:47,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:47,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369963728] [2020-12-22 08:21:47,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:47,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:47,800 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 08:21:47,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369963728] [2020-12-22 08:21:47,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:47,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:21:47,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717554862] [2020-12-22 08:21:47,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:21:47,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:47,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:21:47,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:21:47,803 INFO L87 Difference]: Start difference. First operand 45737 states and 63951 transitions. Second operand 6 states. [2020-12-22 08:21:53,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:53,885 INFO L93 Difference]: Finished difference Result 101399 states and 143542 transitions. [2020-12-22 08:21:53,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:21:53,886 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 08:21:53,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:54,010 INFO L225 Difference]: With dead ends: 101399 [2020-12-22 08:21:54,010 INFO L226 Difference]: Without dead ends: 87112 [2020-12-22 08:21:54,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:21:54,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87112 states. [2020-12-22 08:21:58,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87112 to 58561. [2020-12-22 08:21:58,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58561 states. [2020-12-22 08:21:58,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58561 states to 58561 states and 81905 transitions. [2020-12-22 08:21:58,889 INFO L78 Accepts]: Start accepts. Automaton has 58561 states and 81905 transitions. Word has length 78 [2020-12-22 08:21:58,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:58,889 INFO L481 AbstractCegarLoop]: Abstraction has 58561 states and 81905 transitions. [2020-12-22 08:21:58,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:21:58,889 INFO L276 IsEmpty]: Start isEmpty. Operand 58561 states and 81905 transitions. [2020-12-22 08:21:58,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 08:21:58,899 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:58,899 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:21:58,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:21:58,899 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:58,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:58,900 INFO L82 PathProgramCache]: Analyzing trace with hash -542796544, now seen corresponding path program 1 times [2020-12-22 08:21:58,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:58,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696400441] [2020-12-22 08:21:58,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:58,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:58,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 08:21:58,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696400441] [2020-12-22 08:21:58,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:58,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:21:58,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362002295] [2020-12-22 08:21:58,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:21:58,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:58,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:21:58,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:21:58,990 INFO L87 Difference]: Start difference. First operand 58561 states and 81905 transitions. Second operand 6 states. [2020-12-22 08:22:06,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:22:06,431 INFO L93 Difference]: Finished difference Result 120652 states and 170529 transitions. [2020-12-22 08:22:06,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:22:06,431 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 08:22:06,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:22:06,557 INFO L225 Difference]: With dead ends: 120652 [2020-12-22 08:22:06,557 INFO L226 Difference]: Without dead ends: 99913 [2020-12-22 08:22:06,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:22:06,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99913 states. [2020-12-22 08:22:12,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99913 to 76833. [2020-12-22 08:22:12,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76833 states. [2020-12-22 08:22:12,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76833 states to 76833 states and 107391 transitions. [2020-12-22 08:22:12,947 INFO L78 Accepts]: Start accepts. Automaton has 76833 states and 107391 transitions. Word has length 78 [2020-12-22 08:22:12,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:22:12,947 INFO L481 AbstractCegarLoop]: Abstraction has 76833 states and 107391 transitions. [2020-12-22 08:22:12,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:22:12,947 INFO L276 IsEmpty]: Start isEmpty. Operand 76833 states and 107391 transitions. [2020-12-22 08:22:12,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 08:22:12,955 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:22:12,955 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:22:12,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:22:12,955 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:22:12,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:22:12,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1309904988, now seen corresponding path program 1 times [2020-12-22 08:22:12,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:22:12,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155504271] [2020-12-22 08:22:12,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:22:12,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:22:13,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 08:22:13,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155504271] [2020-12-22 08:22:13,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:22:13,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:22:13,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544817556] [2020-12-22 08:22:13,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:22:13,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:22:13,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:22:13,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:22:13,032 INFO L87 Difference]: Start difference. First operand 76833 states and 107391 transitions. Second operand 6 states. [2020-12-22 08:22:28,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:22:28,288 INFO L93 Difference]: Finished difference Result 263319 states and 366830 transitions. [2020-12-22 08:22:28,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:22:28,289 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 08:22:28,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:22:28,603 INFO L225 Difference]: With dead ends: 263319 [2020-12-22 08:22:28,604 INFO L226 Difference]: Without dead ends: 186593 [2020-12-22 08:22:28,882 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 08:22:29,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186593 states. [2020-12-22 08:22:43,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186593 to 183290. [2020-12-22 08:22:43,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183290 states. [2020-12-22 08:22:43,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183290 states to 183290 states and 254490 transitions. [2020-12-22 08:22:43,989 INFO L78 Accepts]: Start accepts. Automaton has 183290 states and 254490 transitions. Word has length 78 [2020-12-22 08:22:43,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:22:43,989 INFO L481 AbstractCegarLoop]: Abstraction has 183290 states and 254490 transitions. [2020-12-22 08:22:43,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:22:43,989 INFO L276 IsEmpty]: Start isEmpty. Operand 183290 states and 254490 transitions. [2020-12-22 08:22:43,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 08:22:43,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:22:43,998 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:22:43,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:22:43,999 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:22:43,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:22:43,999 INFO L82 PathProgramCache]: Analyzing trace with hash 209052831, now seen corresponding path program 1 times [2020-12-22 08:22:43,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:22:44,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551138134] [2020-12-22 08:22:44,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:22:44,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:22:44,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 08:22:44,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551138134] [2020-12-22 08:22:44,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:22:44,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:22:44,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382798047] [2020-12-22 08:22:44,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:22:44,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:22:44,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:22:44,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:22:44,085 INFO L87 Difference]: Start difference. First operand 183290 states and 254490 transitions. Second operand 6 states. [2020-12-22 08:23:05,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:05,926 INFO L93 Difference]: Finished difference Result 298470 states and 418161 transitions. [2020-12-22 08:23:05,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:23:05,927 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 08:23:05,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:06,610 INFO L225 Difference]: With dead ends: 298470 [2020-12-22 08:23:06,610 INFO L226 Difference]: Without dead ends: 275956 [2020-12-22 08:23:06,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:23:06,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275956 states.