/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.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:40:23,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:40:23,644 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:40:23,713 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:40:23,715 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:40:23,720 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:40:23,726 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:40:23,737 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:40:23,742 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:40:23,751 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:40:23,753 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:40:23,754 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:40:23,755 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:40:23,759 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:40:23,762 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:40:23,764 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:40:23,792 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:40:23,796 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:40:23,805 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:40:23,815 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:40:23,818 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:40:23,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:40:23,824 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:40:23,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:40:23,840 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 08:40:23,841 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 08:40:23,845 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 08:40:23,847 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 08:40:23,848 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 08:40:23,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 08:40:23,852 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:40:23,853 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:40:23,856 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:40:23,858 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:40:23,860 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:40:23,861 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:40:23,862 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:40:23,862 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:40:23,863 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:40:23,864 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:40:23,865 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:40:23,872 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:40:23,939 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:40:23,939 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:40:23,947 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:40:23,948 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:40:23,948 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:40:23,948 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:40:23,949 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:40:23,949 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:40:23,949 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:40:23,949 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:40:23,951 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:40:23,951 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:40:23,952 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:40:23,952 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:40:23,952 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:40:23,952 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:40:23,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:40:23,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:40:23,953 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:40:23,953 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:40:23,954 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:40:23,954 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:40:23,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:40:23,954 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:40:23,955 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:40:23,955 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:40:24,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:40:24,516 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:40:24,520 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:40:24,522 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:40:24,524 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:40:24,525 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-12-22 08:40:24,621 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0432a7c5/a343213b66ea45ec984fa8f6767c6f98/FLAG7c91dba96 [2020-12-22 08:40:25,555 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:40:25,556 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-12-22 08:40:25,572 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0432a7c5/a343213b66ea45ec984fa8f6767c6f98/FLAG7c91dba96 [2020-12-22 08:40:25,779 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0432a7c5/a343213b66ea45ec984fa8f6767c6f98 [2020-12-22 08:40:25,784 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:40:25,789 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:40:25,792 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:40:25,792 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:40:25,798 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:40:25,801 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:40:25" (1/1) ... [2020-12-22 08:40:25,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5476767b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:40:25, skipping insertion in model container [2020-12-22 08:40:25,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:40:25" (1/1) ... [2020-12-22 08:40:25,818 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:40:25,909 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:40:26,234 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.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[6376,6389] [2020-12-22 08:40:26,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:40:26,387 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:40:26,445 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.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[6376,6389] [2020-12-22 08:40:26,482 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:40:26,537 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:40:26,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:40:26 WrapperNode [2020-12-22 08:40:26,538 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:40:26,541 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:40:26,541 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:40:26,542 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:40:26,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:40:26" (1/1) ... [2020-12-22 08:40:26,579 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:40:26" (1/1) ... [2020-12-22 08:40:26,636 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:40:26,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:40:26,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:40:26,641 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:40:26,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:40:26" (1/1) ... [2020-12-22 08:40:26,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:40:26" (1/1) ... [2020-12-22 08:40:26,695 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:40:26" (1/1) ... [2020-12-22 08:40:26,695 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:40:26" (1/1) ... [2020-12-22 08:40:26,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:40:26" (1/1) ... [2020-12-22 08:40:26,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:40:26" (1/1) ... [2020-12-22 08:40:26,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:40:26" (1/1) ... [2020-12-22 08:40:26,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:40:26,765 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:40:26,765 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:40:26,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:40:26,770 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:40:26" (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 08:40:26,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:40:26,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:40:26,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:40:26,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:40:28,438 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:40:28,439 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:40:28,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:40:28 BoogieIcfgContainer [2020-12-22 08:40:28,442 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:40:28,445 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:40:28,445 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:40:28,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:40:28,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:40:25" (1/3) ... [2020-12-22 08:40:28,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73fc7322 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:40:28, skipping insertion in model container [2020-12-22 08:40:28,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:40:26" (2/3) ... [2020-12-22 08:40:28,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73fc7322 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:40:28, skipping insertion in model container [2020-12-22 08:40:28,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:40:28" (3/3) ... [2020-12-22 08:40:28,455 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-12-22 08:40:28,464 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:40:28,473 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:40:28,502 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:40:28,543 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:40:28,543 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:40:28,543 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:40:28,544 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:40:28,544 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:40:28,544 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:40:28,544 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:40:28,544 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:40:28,570 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states. [2020-12-22 08:40:28,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:40:28,582 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:40:28,584 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, 1, 1, 1, 1, 1, 1] [2020-12-22 08:40:28,584 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:40:28,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:40:28,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1296157629, now seen corresponding path program 1 times [2020-12-22 08:40:28,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:40:28,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697280101] [2020-12-22 08:40:28,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:40:28,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:40:29,271 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 08:40:29,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697280101] [2020-12-22 08:40:29,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:40:29,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:40:29,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228685874] [2020-12-22 08:40:29,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:40:29,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:40:29,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:40:29,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:40:29,310 INFO L87 Difference]: Start difference. First operand 123 states. Second operand 3 states. [2020-12-22 08:40:29,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:40:29,537 INFO L93 Difference]: Finished difference Result 243 states and 400 transitions. [2020-12-22 08:40:29,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:40:29,543 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 08:40:29,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:40:29,566 INFO L225 Difference]: With dead ends: 243 [2020-12-22 08:40:29,566 INFO L226 Difference]: Without dead ends: 183 [2020-12-22 08:40:29,572 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 08:40:29,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-12-22 08:40:29,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 181. [2020-12-22 08:40:29,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-12-22 08:40:29,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 260 transitions. [2020-12-22 08:40:29,661 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 260 transitions. Word has length 62 [2020-12-22 08:40:29,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:40:29,662 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 260 transitions. [2020-12-22 08:40:29,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:40:29,662 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 260 transitions. [2020-12-22 08:40:29,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:40:29,666 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:40:29,666 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:40:29,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:40:29,667 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:40:29,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:40:29,668 INFO L82 PathProgramCache]: Analyzing trace with hash -574954446, now seen corresponding path program 1 times [2020-12-22 08:40:29,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:40:29,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004189783] [2020-12-22 08:40:29,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:40:29,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:40:29,979 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 08:40:29,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004189783] [2020-12-22 08:40:29,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:40:29,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:40:29,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623936924] [2020-12-22 08:40:29,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:40:29,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:40:29,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:40:29,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:40:29,990 INFO L87 Difference]: Start difference. First operand 181 states and 260 transitions. Second operand 5 states. [2020-12-22 08:40:30,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:40:30,545 INFO L93 Difference]: Finished difference Result 455 states and 681 transitions. [2020-12-22 08:40:30,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:40:30,546 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 08:40:30,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:40:30,550 INFO L225 Difference]: With dead ends: 455 [2020-12-22 08:40:30,551 INFO L226 Difference]: Without dead ends: 304 [2020-12-22 08:40:30,553 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 08:40:30,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-12-22 08:40:30,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 302. [2020-12-22 08:40:30,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-12-22 08:40:30,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 448 transitions. [2020-12-22 08:40:30,604 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 448 transitions. Word has length 64 [2020-12-22 08:40:30,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:40:30,604 INFO L481 AbstractCegarLoop]: Abstraction has 302 states and 448 transitions. [2020-12-22 08:40:30,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:40:30,605 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 448 transitions. [2020-12-22 08:40:30,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:40:30,608 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:40:30,608 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:40:30,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:40:30,609 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:40:30,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:40:30,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1750156800, now seen corresponding path program 1 times [2020-12-22 08:40:30,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:40:30,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226630883] [2020-12-22 08:40:30,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:40:30,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:40:30,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:40:30,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226630883] [2020-12-22 08:40:30,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:40:30,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:40:30,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843680707] [2020-12-22 08:40:30,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:40:30,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:40:30,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:40:30,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:40:30,924 INFO L87 Difference]: Start difference. First operand 302 states and 448 transitions. Second operand 6 states. [2020-12-22 08:40:31,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:40:31,212 INFO L93 Difference]: Finished difference Result 752 states and 1144 transitions. [2020-12-22 08:40:31,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:40:31,213 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-12-22 08:40:31,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:40:31,219 INFO L225 Difference]: With dead ends: 752 [2020-12-22 08:40:31,219 INFO L226 Difference]: Without dead ends: 492 [2020-12-22 08:40:31,223 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 08:40:31,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2020-12-22 08:40:31,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 490. [2020-12-22 08:40:31,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-12-22 08:40:31,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 735 transitions. [2020-12-22 08:40:31,361 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 735 transitions. Word has length 65 [2020-12-22 08:40:31,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:40:31,372 INFO L481 AbstractCegarLoop]: Abstraction has 490 states and 735 transitions. [2020-12-22 08:40:31,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:40:31,372 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 735 transitions. [2020-12-22 08:40:31,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 08:40:31,380 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:40:31,380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:40:31,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:40:31,386 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:40:31,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:40:31,388 INFO L82 PathProgramCache]: Analyzing trace with hash 693263334, now seen corresponding path program 1 times [2020-12-22 08:40:31,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:40:31,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296630309] [2020-12-22 08:40:31,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:40:31,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:40:31,598 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 08:40:31,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296630309] [2020-12-22 08:40:31,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:40:31,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:40:31,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160903267] [2020-12-22 08:40:31,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:40:31,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:40:31,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:40:31,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:40:31,604 INFO L87 Difference]: Start difference. First operand 490 states and 735 transitions. Second operand 5 states. [2020-12-22 08:40:31,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:40:31,840 INFO L93 Difference]: Finished difference Result 942 states and 1430 transitions. [2020-12-22 08:40:31,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:40:31,841 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-12-22 08:40:31,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:40:31,846 INFO L225 Difference]: With dead ends: 942 [2020-12-22 08:40:31,847 INFO L226 Difference]: Without dead ends: 490 [2020-12-22 08:40:31,849 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 08:40:31,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-12-22 08:40:31,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 490. [2020-12-22 08:40:31,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-12-22 08:40:31,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 726 transitions. [2020-12-22 08:40:31,924 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 726 transitions. Word has length 66 [2020-12-22 08:40:31,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:40:31,924 INFO L481 AbstractCegarLoop]: Abstraction has 490 states and 726 transitions. [2020-12-22 08:40:31,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:40:31,925 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 726 transitions. [2020-12-22 08:40:31,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:40:31,927 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:40:31,927 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:40:31,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:40:31,928 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:40:31,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:40:31,929 INFO L82 PathProgramCache]: Analyzing trace with hash 860241460, now seen corresponding path program 1 times [2020-12-22 08:40:31,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:40:31,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298916832] [2020-12-22 08:40:31,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:40:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:40:32,041 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 08:40:32,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298916832] [2020-12-22 08:40:32,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:40:32,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:40:32,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906223795] [2020-12-22 08:40:32,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:40:32,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:40:32,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:40:32,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:40:32,047 INFO L87 Difference]: Start difference. First operand 490 states and 726 transitions. Second operand 5 states. [2020-12-22 08:40:32,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:40:32,270 INFO L93 Difference]: Finished difference Result 946 states and 1417 transitions. [2020-12-22 08:40:32,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:40:32,271 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 08:40:32,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:40:32,275 INFO L225 Difference]: With dead ends: 946 [2020-12-22 08:40:32,276 INFO L226 Difference]: Without dead ends: 490 [2020-12-22 08:40:32,278 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 08:40:32,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-12-22 08:40:32,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 490. [2020-12-22 08:40:32,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-12-22 08:40:32,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 717 transitions. [2020-12-22 08:40:32,331 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 717 transitions. Word has length 67 [2020-12-22 08:40:32,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:40:32,332 INFO L481 AbstractCegarLoop]: Abstraction has 490 states and 717 transitions. [2020-12-22 08:40:32,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:40:32,332 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 717 transitions. [2020-12-22 08:40:32,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:40:32,334 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:40:32,334 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:40:32,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:40:32,335 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:40:32,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:40:32,336 INFO L82 PathProgramCache]: Analyzing trace with hash -227572070, now seen corresponding path program 1 times [2020-12-22 08:40:32,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:40:32,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729542726] [2020-12-22 08:40:32,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:40:32,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:40:32,490 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 08:40:32,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729542726] [2020-12-22 08:40:32,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:40:32,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:40:32,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664958100] [2020-12-22 08:40:32,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:40:32,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:40:32,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:40:32,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:40:32,497 INFO L87 Difference]: Start difference. First operand 490 states and 717 transitions. Second operand 6 states. [2020-12-22 08:40:32,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:40:32,872 INFO L93 Difference]: Finished difference Result 2166 states and 3244 transitions. [2020-12-22 08:40:32,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:40:32,873 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-12-22 08:40:32,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:40:32,885 INFO L225 Difference]: With dead ends: 2166 [2020-12-22 08:40:32,886 INFO L226 Difference]: Without dead ends: 1792 [2020-12-22 08:40:32,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 1 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 08:40:32,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2020-12-22 08:40:32,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 679. [2020-12-22 08:40:32,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 679 states. [2020-12-22 08:40:32,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1005 transitions. [2020-12-22 08:40:32,990 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1005 transitions. Word has length 68 [2020-12-22 08:40:32,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:40:32,991 INFO L481 AbstractCegarLoop]: Abstraction has 679 states and 1005 transitions. [2020-12-22 08:40:32,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:40:32,991 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1005 transitions. [2020-12-22 08:40:32,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:40:32,993 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:40:32,993 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:40:32,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:40:32,993 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:40:32,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:40:32,994 INFO L82 PathProgramCache]: Analyzing trace with hash 92823086, now seen corresponding path program 1 times [2020-12-22 08:40:32,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:40:32,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904288001] [2020-12-22 08:40:32,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:40:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:40:33,153 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 08:40:33,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904288001] [2020-12-22 08:40:33,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:40:33,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:40:33,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986649610] [2020-12-22 08:40:33,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:40:33,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:40:33,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:40:33,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:40:33,159 INFO L87 Difference]: Start difference. First operand 679 states and 1005 transitions. Second operand 6 states. [2020-12-22 08:40:33,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:40:33,548 INFO L93 Difference]: Finished difference Result 2287 states and 3430 transitions. [2020-12-22 08:40:33,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:40:33,548 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-12-22 08:40:33,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:40:33,563 INFO L225 Difference]: With dead ends: 2287 [2020-12-22 08:40:33,564 INFO L226 Difference]: Without dead ends: 1913 [2020-12-22 08:40:33,568 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 08:40:33,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2020-12-22 08:40:33,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1098. [2020-12-22 08:40:33,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1098 states. [2020-12-22 08:40:33,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 1643 transitions. [2020-12-22 08:40:33,744 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 1643 transitions. Word has length 68 [2020-12-22 08:40:33,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:40:33,745 INFO L481 AbstractCegarLoop]: Abstraction has 1098 states and 1643 transitions. [2020-12-22 08:40:33,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:40:33,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 1643 transitions. [2020-12-22 08:40:33,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:40:33,754 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:40:33,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:40:33,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:40:33,756 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:40:33,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:40:33,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1958096002, now seen corresponding path program 1 times [2020-12-22 08:40:33,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:40:33,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208582441] [2020-12-22 08:40:33,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:40:33,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:40:34,007 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 08:40:34,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208582441] [2020-12-22 08:40:34,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:40:34,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:40:34,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346566328] [2020-12-22 08:40:34,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:40:34,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:40:34,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:40:34,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:40:34,012 INFO L87 Difference]: Start difference. First operand 1098 states and 1643 transitions. Second operand 6 states. [2020-12-22 08:40:34,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:40:34,445 INFO L93 Difference]: Finished difference Result 2451 states and 3679 transitions. [2020-12-22 08:40:34,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:40:34,446 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-12-22 08:40:34,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:40:34,466 INFO L225 Difference]: With dead ends: 2451 [2020-12-22 08:40:34,467 INFO L226 Difference]: Without dead ends: 2077 [2020-12-22 08:40:34,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 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 08:40:34,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2020-12-22 08:40:34,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 1294. [2020-12-22 08:40:34,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1294 states. [2020-12-22 08:40:34,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 1941 transitions. [2020-12-22 08:40:34,734 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 1941 transitions. Word has length 68 [2020-12-22 08:40:34,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:40:34,734 INFO L481 AbstractCegarLoop]: Abstraction has 1294 states and 1941 transitions. [2020-12-22 08:40:34,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:40:34,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 1941 transitions. [2020-12-22 08:40:34,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:40:34,737 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:40:34,737 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:40:34,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:40:34,738 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:40:34,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:40:34,738 INFO L82 PathProgramCache]: Analyzing trace with hash -841212636, now seen corresponding path program 1 times [2020-12-22 08:40:34,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:40:34,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219276463] [2020-12-22 08:40:34,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:40:34,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:40:34,841 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 08:40:34,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219276463] [2020-12-22 08:40:34,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:40:34,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:40:34,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509117320] [2020-12-22 08:40:34,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:40:34,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:40:34,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:40:34,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:40:34,854 INFO L87 Difference]: Start difference. First operand 1294 states and 1941 transitions. Second operand 3 states. [2020-12-22 08:40:35,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:40:35,222 INFO L93 Difference]: Finished difference Result 3458 states and 5191 transitions. [2020-12-22 08:40:35,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:40:35,223 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 08:40:35,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:40:35,239 INFO L225 Difference]: With dead ends: 3458 [2020-12-22 08:40:35,239 INFO L226 Difference]: Without dead ends: 2308 [2020-12-22 08:40:35,246 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 08:40:35,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2020-12-22 08:40:35,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 2306. [2020-12-22 08:40:35,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2306 states. [2020-12-22 08:40:35,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 3401 transitions. [2020-12-22 08:40:35,556 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 3401 transitions. Word has length 68 [2020-12-22 08:40:35,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:40:35,556 INFO L481 AbstractCegarLoop]: Abstraction has 2306 states and 3401 transitions. [2020-12-22 08:40:35,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:40:35,557 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 3401 transitions. [2020-12-22 08:40:35,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:40:35,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:40:35,559 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:40:35,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:40:35,560 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:40:35,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:40:35,562 INFO L82 PathProgramCache]: Analyzing trace with hash -670539997, now seen corresponding path program 1 times [2020-12-22 08:40:35,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:40:35,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372699710] [2020-12-22 08:40:35,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:40:35,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:40:35,663 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 08:40:35,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372699710] [2020-12-22 08:40:35,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:40:35,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:40:35,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029550330] [2020-12-22 08:40:35,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:40:35,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:40:35,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:40:35,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:40:35,678 INFO L87 Difference]: Start difference. First operand 2306 states and 3401 transitions. Second operand 3 states. [2020-12-22 08:40:36,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:40:36,234 INFO L93 Difference]: Finished difference Result 5910 states and 8739 transitions. [2020-12-22 08:40:36,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:40:36,235 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 08:40:36,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:40:36,263 INFO L225 Difference]: With dead ends: 5910 [2020-12-22 08:40:36,263 INFO L226 Difference]: Without dead ends: 3748 [2020-12-22 08:40:36,269 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 08:40:36,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3748 states. [2020-12-22 08:40:36,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3748 to 3746. [2020-12-22 08:40:36,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3746 states. [2020-12-22 08:40:36,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3746 states to 3746 states and 5489 transitions. [2020-12-22 08:40:36,851 INFO L78 Accepts]: Start accepts. Automaton has 3746 states and 5489 transitions. Word has length 68 [2020-12-22 08:40:36,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:40:36,852 INFO L481 AbstractCegarLoop]: Abstraction has 3746 states and 5489 transitions. [2020-12-22 08:40:36,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:40:36,852 INFO L276 IsEmpty]: Start isEmpty. Operand 3746 states and 5489 transitions. [2020-12-22 08:40:36,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:40:36,854 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:40:36,854 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:40:36,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:40:36,855 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:40:36,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:40:36,858 INFO L82 PathProgramCache]: Analyzing trace with hash 493156882, now seen corresponding path program 1 times [2020-12-22 08:40:36,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:40:36,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402085529] [2020-12-22 08:40:36,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:40:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:40:37,020 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 08:40:37,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402085529] [2020-12-22 08:40:37,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:40:37,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:40:37,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929316054] [2020-12-22 08:40:37,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:40:37,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:40:37,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:40:37,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:40:37,026 INFO L87 Difference]: Start difference. First operand 3746 states and 5489 transitions. Second operand 6 states. [2020-12-22 08:40:38,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:40:38,121 INFO L93 Difference]: Finished difference Result 7888 states and 11590 transitions. [2020-12-22 08:40:38,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:40:38,122 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-12-22 08:40:38,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:40:38,166 INFO L225 Difference]: With dead ends: 7888 [2020-12-22 08:40:38,166 INFO L226 Difference]: Without dead ends: 6822 [2020-12-22 08:40:38,172 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 08:40:38,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6822 states. [2020-12-22 08:40:38,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6822 to 4489. [2020-12-22 08:40:38,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4489 states. [2020-12-22 08:40:38,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4489 states to 4489 states and 6581 transitions. [2020-12-22 08:40:38,875 INFO L78 Accepts]: Start accepts. Automaton has 4489 states and 6581 transitions. Word has length 68 [2020-12-22 08:40:38,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:40:38,876 INFO L481 AbstractCegarLoop]: Abstraction has 4489 states and 6581 transitions. [2020-12-22 08:40:38,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:40:38,877 INFO L276 IsEmpty]: Start isEmpty. Operand 4489 states and 6581 transitions. [2020-12-22 08:40:38,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 08:40:38,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:40:38,879 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:40:38,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:40:38,880 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:40:38,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:40:38,881 INFO L82 PathProgramCache]: Analyzing trace with hash -147544852, now seen corresponding path program 1 times [2020-12-22 08:40:38,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:40:38,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880747648] [2020-12-22 08:40:38,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:40:38,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:40:39,038 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 08:40:39,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880747648] [2020-12-22 08:40:39,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:40:39,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:40:39,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964561981] [2020-12-22 08:40:39,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:40:39,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:40:39,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:40:39,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:40:39,042 INFO L87 Difference]: Start difference. First operand 4489 states and 6581 transitions. Second operand 4 states. [2020-12-22 08:40:39,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:40:39,921 INFO L93 Difference]: Finished difference Result 10701 states and 15723 transitions. [2020-12-22 08:40:39,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:40:39,922 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-12-22 08:40:39,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:40:39,968 INFO L225 Difference]: With dead ends: 10701 [2020-12-22 08:40:39,968 INFO L226 Difference]: Without dead ends: 6375 [2020-12-22 08:40:39,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:40:39,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6375 states. [2020-12-22 08:40:40,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6375 to 6373. [2020-12-22 08:40:40,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6373 states. [2020-12-22 08:40:40,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6373 states to 6373 states and 9299 transitions. [2020-12-22 08:40:40,783 INFO L78 Accepts]: Start accepts. Automaton has 6373 states and 9299 transitions. Word has length 69 [2020-12-22 08:40:40,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:40:40,784 INFO L481 AbstractCegarLoop]: Abstraction has 6373 states and 9299 transitions. [2020-12-22 08:40:40,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:40:40,784 INFO L276 IsEmpty]: Start isEmpty. Operand 6373 states and 9299 transitions. [2020-12-22 08:40:40,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 08:40:40,786 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:40:40,787 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:40:40,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:40:40,788 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:40:40,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:40:40,789 INFO L82 PathProgramCache]: Analyzing trace with hash 686187248, now seen corresponding path program 1 times [2020-12-22 08:40:40,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:40:40,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908436829] [2020-12-22 08:40:40,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:40:40,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:40:40,922 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 08:40:40,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908436829] [2020-12-22 08:40:40,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:40:40,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:40:40,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932317059] [2020-12-22 08:40:40,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:40:40,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:40:40,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:40:40,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:40:40,926 INFO L87 Difference]: Start difference. First operand 6373 states and 9299 transitions. Second operand 5 states. [2020-12-22 08:40:42,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:40:42,395 INFO L93 Difference]: Finished difference Result 9725 states and 14148 transitions. [2020-12-22 08:40:42,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:40:42,402 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-12-22 08:40:42,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:40:42,443 INFO L225 Difference]: With dead ends: 9725 [2020-12-22 08:40:42,443 INFO L226 Difference]: Without dead ends: 9723 [2020-12-22 08:40:42,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 08:40:42,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9723 states. [2020-12-22 08:40:43,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9723 to 6413. [2020-12-22 08:40:43,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6413 states. [2020-12-22 08:40:43,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6413 states to 6413 states and 9293 transitions. [2020-12-22 08:40:43,405 INFO L78 Accepts]: Start accepts. Automaton has 6413 states and 9293 transitions. Word has length 69 [2020-12-22 08:40:43,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:40:43,406 INFO L481 AbstractCegarLoop]: Abstraction has 6413 states and 9293 transitions. [2020-12-22 08:40:43,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:40:43,406 INFO L276 IsEmpty]: Start isEmpty. Operand 6413 states and 9293 transitions. [2020-12-22 08:40:43,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 08:40:43,408 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:40:43,409 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:40:43,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:40:43,409 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:40:43,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:40:43,410 INFO L82 PathProgramCache]: Analyzing trace with hash 158979165, now seen corresponding path program 1 times [2020-12-22 08:40:43,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:40:43,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200597118] [2020-12-22 08:40:43,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:40:43,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:40:43,693 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 08:40:43,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200597118] [2020-12-22 08:40:43,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:40:43,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:40:43,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350490028] [2020-12-22 08:40:43,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:40:43,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:40:43,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:40:43,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:40:43,696 INFO L87 Difference]: Start difference. First operand 6413 states and 9293 transitions. Second operand 10 states. [2020-12-22 08:40:46,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:40:46,844 INFO L93 Difference]: Finished difference Result 19191 states and 27692 transitions. [2020-12-22 08:40:46,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 08:40:46,845 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-12-22 08:40:46,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:40:46,895 INFO L225 Difference]: With dead ends: 19191 [2020-12-22 08:40:46,896 INFO L226 Difference]: Without dead ends: 12881 [2020-12-22 08:40:46,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2020-12-22 08:40:46,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12881 states. [2020-12-22 08:40:47,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12881 to 6413. [2020-12-22 08:40:47,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6413 states. [2020-12-22 08:40:47,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6413 states to 6413 states and 9290 transitions. [2020-12-22 08:40:47,895 INFO L78 Accepts]: Start accepts. Automaton has 6413 states and 9290 transitions. Word has length 70 [2020-12-22 08:40:47,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:40:47,896 INFO L481 AbstractCegarLoop]: Abstraction has 6413 states and 9290 transitions. [2020-12-22 08:40:47,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:40:47,896 INFO L276 IsEmpty]: Start isEmpty. Operand 6413 states and 9290 transitions. [2020-12-22 08:40:47,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 08:40:47,898 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:40:47,899 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:40:47,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:40:47,899 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:40:47,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:40:47,900 INFO L82 PathProgramCache]: Analyzing trace with hash 559312961, now seen corresponding path program 1 times [2020-12-22 08:40:47,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:40:47,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844379412] [2020-12-22 08:40:47,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:40:47,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:40:48,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:40:48,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844379412] [2020-12-22 08:40:48,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:40:48,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:40:48,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977539413] [2020-12-22 08:40:48,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:40:48,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:40:48,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:40:48,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:40:48,234 INFO L87 Difference]: Start difference. First operand 6413 states and 9290 transitions. Second operand 10 states. [2020-12-22 08:40:50,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:40:50,783 INFO L93 Difference]: Finished difference Result 19247 states and 27788 transitions. [2020-12-22 08:40:50,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 08:40:50,784 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-12-22 08:40:50,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:40:50,839 INFO L225 Difference]: With dead ends: 19247 [2020-12-22 08:40:50,839 INFO L226 Difference]: Without dead ends: 12988 [2020-12-22 08:40:50,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2020-12-22 08:40:50,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12988 states. [2020-12-22 08:40:52,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12988 to 6413. [2020-12-22 08:40:52,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6413 states. [2020-12-22 08:40:52,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6413 states to 6413 states and 9281 transitions. [2020-12-22 08:40:52,111 INFO L78 Accepts]: Start accepts. Automaton has 6413 states and 9281 transitions. Word has length 70 [2020-12-22 08:40:52,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:40:52,111 INFO L481 AbstractCegarLoop]: Abstraction has 6413 states and 9281 transitions. [2020-12-22 08:40:52,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:40:52,112 INFO L276 IsEmpty]: Start isEmpty. Operand 6413 states and 9281 transitions. [2020-12-22 08:40:52,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 08:40:52,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:40:52,114 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:40:52,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:40:52,114 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:40:52,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:40:52,115 INFO L82 PathProgramCache]: Analyzing trace with hash -761151707, now seen corresponding path program 1 times [2020-12-22 08:40:52,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:40:52,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198682723] [2020-12-22 08:40:52,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:40:52,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:40:52,332 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 08:40:52,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198682723] [2020-12-22 08:40:52,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:40:52,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 08:40:52,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264301479] [2020-12-22 08:40:52,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 08:40:52,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:40:52,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 08:40:52,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:40:52,334 INFO L87 Difference]: Start difference. First operand 6413 states and 9281 transitions. Second operand 9 states. [2020-12-22 08:40:54,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:40:54,082 INFO L93 Difference]: Finished difference Result 14840 states and 21506 transitions. [2020-12-22 08:40:54,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 08:40:54,083 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 70 [2020-12-22 08:40:54,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:40:54,112 INFO L225 Difference]: With dead ends: 14840 [2020-12-22 08:40:54,112 INFO L226 Difference]: Without dead ends: 9574 [2020-12-22 08:40:54,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-12-22 08:40:54,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9574 states. [2020-12-22 08:40:55,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9574 to 6413. [2020-12-22 08:40:55,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6413 states. [2020-12-22 08:40:55,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6413 states to 6413 states and 9280 transitions. [2020-12-22 08:40:55,873 INFO L78 Accepts]: Start accepts. Automaton has 6413 states and 9280 transitions. Word has length 70 [2020-12-22 08:40:55,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:40:55,873 INFO L481 AbstractCegarLoop]: Abstraction has 6413 states and 9280 transitions. [2020-12-22 08:40:55,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 08:40:55,873 INFO L276 IsEmpty]: Start isEmpty. Operand 6413 states and 9280 transitions. [2020-12-22 08:40:55,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 08:40:55,875 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:40:55,875 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:40:55,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:40:55,875 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:40:55,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:40:55,876 INFO L82 PathProgramCache]: Analyzing trace with hash -795660249, now seen corresponding path program 1 times [2020-12-22 08:40:55,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:40:55,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144639715] [2020-12-22 08:40:55,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:40:55,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:40:56,167 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 08:40:56,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144639715] [2020-12-22 08:40:56,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:40:56,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:40:56,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123697529] [2020-12-22 08:40:56,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:40:56,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:40:56,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:40:56,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:40:56,172 INFO L87 Difference]: Start difference. First operand 6413 states and 9280 transitions. Second operand 10 states. [2020-12-22 08:40:59,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:40:59,532 INFO L93 Difference]: Finished difference Result 19298 states and 27844 transitions. [2020-12-22 08:40:59,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 08:40:59,533 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 71 [2020-12-22 08:40:59,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:40:59,572 INFO L225 Difference]: With dead ends: 19298 [2020-12-22 08:40:59,572 INFO L226 Difference]: Without dead ends: 13003 [2020-12-22 08:40:59,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-12-22 08:40:59,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13003 states. [2020-12-22 08:41:01,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13003 to 6413. [2020-12-22 08:41:01,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6413 states. [2020-12-22 08:41:01,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6413 states to 6413 states and 9274 transitions. [2020-12-22 08:41:01,082 INFO L78 Accepts]: Start accepts. Automaton has 6413 states and 9274 transitions. Word has length 71 [2020-12-22 08:41:01,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:41:01,083 INFO L481 AbstractCegarLoop]: Abstraction has 6413 states and 9274 transitions. [2020-12-22 08:41:01,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:41:01,083 INFO L276 IsEmpty]: Start isEmpty. Operand 6413 states and 9274 transitions. [2020-12-22 08:41:01,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 08:41:01,086 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:41:01,086 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:41:01,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:41:01,086 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:41:01,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:41:01,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1977550344, now seen corresponding path program 1 times [2020-12-22 08:41:01,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:41:01,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210044074] [2020-12-22 08:41:01,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:41:01,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:41:02,724 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 08:41:02,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210044074] [2020-12-22 08:41:02,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:41:02,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-12-22 08:41:02,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182012376] [2020-12-22 08:41:02,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 08:41:02,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:41:02,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 08:41:02,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2020-12-22 08:41:02,727 INFO L87 Difference]: Start difference. First operand 6413 states and 9274 transitions. Second operand 27 states. [2020-12-22 08:41:03,115 WARN L197 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 90 [2020-12-22 08:41:03,773 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-12-22 08:41:03,995 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 08:41:04,221 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 08:41:04,689 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 08:41:04,986 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-12-22 08:41:05,363 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-12-22 08:41:05,768 WARN L197 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 80 [2020-12-22 08:41:06,240 WARN L197 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-12-22 08:41:06,713 WARN L197 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 98 [2020-12-22 08:41:07,310 WARN L197 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 112 [2020-12-22 08:41:07,629 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-12-22 08:41:07,964 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-12-22 08:41:08,222 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-12-22 08:41:08,477 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-12-22 08:41:10,516 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-12-22 08:41:15,213 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 08:41:17,925 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-12-22 08:41:23,689 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 08:41:31,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:41:31,023 INFO L93 Difference]: Finished difference Result 70717 states and 102754 transitions. [2020-12-22 08:41:31,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 08:41:31,025 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 72 [2020-12-22 08:41:31,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:41:31,269 INFO L225 Difference]: With dead ends: 70717 [2020-12-22 08:41:31,270 INFO L226 Difference]: Without dead ends: 68484 [2020-12-22 08:41:31,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=504, Invalid=2802, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 08:41:31,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68484 states. [2020-12-22 08:41:33,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68484 to 6428. [2020-12-22 08:41:33,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6428 states. [2020-12-22 08:41:33,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6428 states to 6428 states and 9293 transitions. [2020-12-22 08:41:33,842 INFO L78 Accepts]: Start accepts. Automaton has 6428 states and 9293 transitions. Word has length 72 [2020-12-22 08:41:33,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:41:33,843 INFO L481 AbstractCegarLoop]: Abstraction has 6428 states and 9293 transitions. [2020-12-22 08:41:33,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 08:41:33,843 INFO L276 IsEmpty]: Start isEmpty. Operand 6428 states and 9293 transitions. [2020-12-22 08:41:33,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 08:41:33,845 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:41:33,845 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:41:33,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 08:41:33,846 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:41:33,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:41:33,846 INFO L82 PathProgramCache]: Analyzing trace with hash 821766808, now seen corresponding path program 1 times [2020-12-22 08:41:33,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:41:33,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325538054] [2020-12-22 08:41:33,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:41:33,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:41:35,918 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 08:41:35,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325538054] [2020-12-22 08:41:35,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:41:35,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-12-22 08:41:35,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773940654] [2020-12-22 08:41:35,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 08:41:35,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:41:35,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 08:41:35,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2020-12-22 08:41:35,922 INFO L87 Difference]: Start difference. First operand 6428 states and 9293 transitions. Second operand 28 states. [2020-12-22 08:41:36,380 WARN L197 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 98 [2020-12-22 08:41:37,015 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2020-12-22 08:41:37,228 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-12-22 08:41:37,448 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-12-22 08:41:37,733 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-12-22 08:41:38,168 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-12-22 08:41:38,443 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-12-22 08:41:38,823 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-12-22 08:41:39,268 WARN L197 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2020-12-22 08:41:39,825 WARN L197 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-12-22 08:41:40,414 WARN L197 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 103 [2020-12-22 08:41:41,112 WARN L197 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 117 [2020-12-22 08:41:41,445 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-12-22 08:41:41,752 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-12-22 08:41:41,966 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-12-22 08:41:42,221 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-12-22 08:41:42,418 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-12-22 08:41:42,945 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-12-22 08:41:43,126 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-12-22 08:41:43,513 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-12-22 08:41:43,946 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-12-22 08:41:50,618 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-12-22 08:41:55,000 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2020-12-22 08:41:59,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:41:59,199 INFO L93 Difference]: Finished difference Result 35167 states and 51069 transitions. [2020-12-22 08:41:59,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 08:41:59,200 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 72 [2020-12-22 08:41:59,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:41:59,284 INFO L225 Difference]: With dead ends: 35167 [2020-12-22 08:41:59,284 INFO L226 Difference]: Without dead ends: 33838 [2020-12-22 08:41:59,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=609, Invalid=3173, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 08:41:59,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33838 states. [2020-12-22 08:42:01,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33838 to 6433. [2020-12-22 08:42:01,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6433 states. [2020-12-22 08:42:01,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6433 states to 6433 states and 9298 transitions. [2020-12-22 08:42:01,313 INFO L78 Accepts]: Start accepts. Automaton has 6433 states and 9298 transitions. Word has length 72 [2020-12-22 08:42:01,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:42:01,313 INFO L481 AbstractCegarLoop]: Abstraction has 6433 states and 9298 transitions. [2020-12-22 08:42:01,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 08:42:01,314 INFO L276 IsEmpty]: Start isEmpty. Operand 6433 states and 9298 transitions. [2020-12-22 08:42:01,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 08:42:01,315 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:42:01,315 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:42:01,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 08:42:01,315 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:42:01,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:42:01,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1122165289, now seen corresponding path program 1 times [2020-12-22 08:42:01,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:42:01,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816651215] [2020-12-22 08:42:01,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:42:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:42:03,757 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 08:42:03,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816651215] [2020-12-22 08:42:03,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:42:03,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-12-22 08:42:03,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708134941] [2020-12-22 08:42:03,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 08:42:03,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:42:03,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 08:42:03,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2020-12-22 08:42:03,761 INFO L87 Difference]: Start difference. First operand 6433 states and 9298 transitions. Second operand 28 states. [2020-12-22 08:42:04,349 WARN L197 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 101 [2020-12-22 08:42:05,031 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2020-12-22 08:42:05,251 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2020-12-22 08:42:05,605 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-12-22 08:42:05,914 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-12-22 08:42:06,192 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-12-22 08:42:06,707 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-12-22 08:42:07,087 WARN L197 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-12-22 08:42:07,618 WARN L197 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2020-12-22 08:42:08,198 WARN L197 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 93 [2020-12-22 08:42:08,905 WARN L197 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 101 [2020-12-22 08:42:09,668 WARN L197 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 111 [2020-12-22 08:42:10,616 WARN L197 SmtUtils]: Spent 797.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 123 [2020-12-22 08:42:11,047 WARN L197 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-12-22 08:42:11,475 WARN L197 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-12-22 08:42:11,736 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-12-22 08:42:12,086 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-12-22 08:42:12,337 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-12-22 08:42:12,582 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2020-12-22 08:42:12,841 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-12-22 08:42:13,069 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-12-22 08:42:13,509 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-12-22 08:42:14,116 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-12-22 08:42:14,780 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-12-22 08:42:15,289 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-12-22 08:42:15,710 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-12-22 08:42:20,329 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-12-22 08:42:22,360 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-12-22 08:42:28,374 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-12-22 08:42:34,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:42:34,963 INFO L93 Difference]: Finished difference Result 47211 states and 68613 transitions. [2020-12-22 08:42:34,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 08:42:34,965 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 72 [2020-12-22 08:42:34,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:42:35,084 INFO L225 Difference]: With dead ends: 47211 [2020-12-22 08:42:35,084 INFO L226 Difference]: Without dead ends: 45883 [2020-12-22 08:42:35,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=638, Invalid=3268, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 08:42:35,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45883 states. [2020-12-22 08:42:37,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45883 to 6438. [2020-12-22 08:42:37,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6438 states. [2020-12-22 08:42:37,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6438 states to 6438 states and 9304 transitions. [2020-12-22 08:42:37,644 INFO L78 Accepts]: Start accepts. Automaton has 6438 states and 9304 transitions. Word has length 72 [2020-12-22 08:42:37,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:42:37,644 INFO L481 AbstractCegarLoop]: Abstraction has 6438 states and 9304 transitions. [2020-12-22 08:42:37,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 08:42:37,645 INFO L276 IsEmpty]: Start isEmpty. Operand 6438 states and 9304 transitions. [2020-12-22 08:42:37,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 08:42:37,646 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:42:37,646 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:42:37,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 08:42:37,647 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:42:37,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:42:37,647 INFO L82 PathProgramCache]: Analyzing trace with hash 727688951, now seen corresponding path program 1 times [2020-12-22 08:42:37,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:42:37,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619411490] [2020-12-22 08:42:37,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:42:37,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:42:40,330 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 08:42:40,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619411490] [2020-12-22 08:42:40,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:42:40,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-12-22 08:42:40,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081803910] [2020-12-22 08:42:40,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 08:42:40,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:42:40,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 08:42:40,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2020-12-22 08:42:40,334 INFO L87 Difference]: Start difference. First operand 6438 states and 9304 transitions. Second operand 28 states. [2020-12-22 08:42:41,146 WARN L197 SmtUtils]: Spent 708.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 109 [2020-12-22 08:42:41,509 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2020-12-22 08:42:41,776 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2020-12-22 08:42:42,050 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2020-12-22 08:42:42,403 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2020-12-22 08:42:42,774 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-12-22 08:42:43,076 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-12-22 08:42:43,784 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-12-22 08:42:44,297 WARN L197 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2020-12-22 08:42:44,951 WARN L197 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2020-12-22 08:42:45,640 WARN L197 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 89 [2020-12-22 08:42:46,466 WARN L197 SmtUtils]: Spent 636.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 98 [2020-12-22 08:42:47,392 WARN L197 SmtUtils]: Spent 780.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 109 [2020-12-22 08:42:48,468 WARN L197 SmtUtils]: Spent 891.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 124 [2020-12-22 08:42:49,002 WARN L197 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-12-22 08:42:49,556 WARN L197 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-12-22 08:42:50,368 WARN L197 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2020-12-22 08:42:50,954 WARN L197 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2020-12-22 08:42:51,735 WARN L197 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-12-22 08:42:52,402 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-12-22 08:42:52,872 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-12-22 08:42:53,566 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2020-12-22 08:42:54,050 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2020-12-22 08:42:54,764 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2020-12-22 08:43:05,191 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 08:43:11,405 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2020-12-22 08:43:16,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:43:16,658 INFO L93 Difference]: Finished difference Result 34368 states and 49906 transitions. [2020-12-22 08:43:16,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 08:43:16,662 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 72 [2020-12-22 08:43:16,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:43:16,764 INFO L225 Difference]: With dead ends: 34368 [2020-12-22 08:43:16,765 INFO L226 Difference]: Without dead ends: 33039 [2020-12-22 08:43:16,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=515, Invalid=2565, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 08:43:16,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33039 states. [2020-12-22 08:43:19,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33039 to 6443. [2020-12-22 08:43:19,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6443 states. [2020-12-22 08:43:19,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6443 states to 6443 states and 9311 transitions. [2020-12-22 08:43:19,179 INFO L78 Accepts]: Start accepts. Automaton has 6443 states and 9311 transitions. Word has length 72 [2020-12-22 08:43:19,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:43:19,180 INFO L481 AbstractCegarLoop]: Abstraction has 6443 states and 9311 transitions. [2020-12-22 08:43:19,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 08:43:19,180 INFO L276 IsEmpty]: Start isEmpty. Operand 6443 states and 9311 transitions. [2020-12-22 08:43:19,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 08:43:19,181 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:43:19,182 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:43:19,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 08:43:19,182 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:43:19,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:43:19,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1216243146, now seen corresponding path program 1 times [2020-12-22 08:43:19,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:43:19,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813028939] [2020-12-22 08:43:19,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:43:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:43:20,207 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-12-22 08:43:22,101 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 08:43:22,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813028939] [2020-12-22 08:43:22,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:43:22,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-12-22 08:43:22,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550929075] [2020-12-22 08:43:22,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 08:43:22,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:43:22,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 08:43:22,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2020-12-22 08:43:22,104 INFO L87 Difference]: Start difference. First operand 6443 states and 9311 transitions. Second operand 28 states. [2020-12-22 08:43:22,829 WARN L197 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 92 [2020-12-22 08:43:23,245 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2020-12-22 08:43:23,489 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2020-12-22 08:43:23,798 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2020-12-22 08:43:24,136 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 08:43:24,462 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2020-12-22 08:43:25,132 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-12-22 08:43:25,531 WARN L197 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-12-22 08:43:26,060 WARN L197 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-12-22 08:43:26,652 WARN L197 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2020-12-22 08:43:27,132 WARN L197 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 79 [2020-12-22 08:43:27,598 WARN L197 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 89 [2020-12-22 08:43:28,273 WARN L197 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 100 [2020-12-22 08:43:28,640 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-12-22 08:43:29,005 WARN L197 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-12-22 08:43:29,503 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-12-22 08:43:29,912 WARN L197 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-12-22 08:43:30,427 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-12-22 08:43:32,151 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-12-22 08:43:36,889 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2020-12-22 08:43:38,885 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-12-22 08:43:44,873 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-12-22 08:43:52,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:43:52,090 INFO L93 Difference]: Finished difference Result 46315 states and 67315 transitions. [2020-12-22 08:43:52,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 08:43:52,093 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 72 [2020-12-22 08:43:52,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:43:52,145 INFO L225 Difference]: With dead ends: 46315 [2020-12-22 08:43:52,146 INFO L226 Difference]: Without dead ends: 44987 [2020-12-22 08:43:52,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=545, Invalid=2647, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 08:43:52,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44987 states. [2020-12-22 08:43:54,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44987 to 6448. [2020-12-22 08:43:54,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6448 states. [2020-12-22 08:43:54,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6448 states to 6448 states and 9317 transitions. [2020-12-22 08:43:54,535 INFO L78 Accepts]: Start accepts. Automaton has 6448 states and 9317 transitions. Word has length 72 [2020-12-22 08:43:54,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:43:54,535 INFO L481 AbstractCegarLoop]: Abstraction has 6448 states and 9317 transitions. [2020-12-22 08:43:54,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 08:43:54,536 INFO L276 IsEmpty]: Start isEmpty. Operand 6448 states and 9317 transitions. [2020-12-22 08:43:54,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 08:43:54,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:43:54,537 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:43:54,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 08:43:54,537 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:43:54,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:43:54,538 INFO L82 PathProgramCache]: Analyzing trace with hash -630191304, now seen corresponding path program 1 times [2020-12-22 08:43:54,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:43:54,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569967769] [2020-12-22 08:43:54,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:43:54,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:43:56,533 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 08:43:56,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569967769] [2020-12-22 08:43:56,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:43:56,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-12-22 08:43:56,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283914065] [2020-12-22 08:43:56,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 08:43:56,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:43:56,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 08:43:56,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2020-12-22 08:43:56,535 INFO L87 Difference]: Start difference. First operand 6448 states and 9317 transitions. Second operand 28 states. [2020-12-22 08:43:57,257 WARN L197 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 100 [2020-12-22 08:43:57,994 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2020-12-22 08:43:58,229 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-12-22 08:43:58,500 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-12-22 08:43:58,801 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-12-22 08:43:59,101 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-12-22 08:43:59,675 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-12-22 08:44:00,089 WARN L197 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-12-22 08:44:00,576 WARN L197 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2020-12-22 08:44:01,082 WARN L197 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2020-12-22 08:44:01,734 WARN L197 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 93 [2020-12-22 08:44:02,458 WARN L197 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 104 [2020-12-22 08:44:03,365 WARN L197 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 113 [2020-12-22 08:44:03,806 WARN L197 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-12-22 08:44:04,255 WARN L197 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-12-22 08:44:04,912 WARN L197 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-12-22 08:44:05,464 WARN L197 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-12-22 08:44:06,114 WARN L197 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-12-22 08:44:06,833 WARN L197 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-12-22 08:44:07,370 WARN L197 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-12-22 08:44:07,999 WARN L197 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-12-22 08:44:08,576 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-12-22 08:44:09,024 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-12-22 08:44:15,630 WARN L197 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2020-12-22 08:44:24,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:44:24,225 INFO L93 Difference]: Finished difference Result 28067 states and 40720 transitions. [2020-12-22 08:44:24,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 08:44:24,227 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 72 [2020-12-22 08:44:24,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:44:24,257 INFO L225 Difference]: With dead ends: 28067 [2020-12-22 08:44:24,257 INFO L226 Difference]: Without dead ends: 26738 [2020-12-22 08:44:24,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=621, Invalid=2571, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 08:44:24,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26738 states.