/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/product-lines/elevator_spec2_product18.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 06:04:19,454 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 06:04:19,457 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 06:04:19,494 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 06:04:19,495 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 06:04:19,496 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 06:04:19,498 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 06:04:19,501 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 06:04:19,503 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 06:04:19,504 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 06:04:19,505 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 06:04:19,507 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 06:04:19,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 06:04:19,509 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 06:04:19,510 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 06:04:19,511 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 06:04:19,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 06:04:19,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 06:04:19,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 06:04:19,551 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 06:04:19,554 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 06:04:19,557 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 06:04:19,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 06:04:19,563 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 06:04:19,571 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 06:04:19,583 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 06:04:19,584 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 06:04:19,585 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 06:04:19,590 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 06:04:19,591 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 06:04:19,592 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 06:04:19,593 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 06:04:19,593 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 06:04:19,593 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 06:04:19,594 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 06:04:19,595 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 06:04:19,596 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 06:04:19,628 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 06:04:19,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 06:04:19,630 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 06:04:19,631 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 06:04:19,631 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 06:04:19,631 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 06:04:19,631 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 06:04:19,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 06:04:19,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 06:04:19,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 06:04:19,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 06:04:19,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 06:04:19,633 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 06:04:19,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 06:04:19,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 06:04:19,633 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 06:04:19,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 06:04:19,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:04:19,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 06:04:19,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 06:04:19,634 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 06:04:19,635 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 06:04:19,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 06:04:19,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 06:04:19,635 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 06:04:19,636 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 06:04:20,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 06:04:20,106 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 06:04:20,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 06:04:20,111 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 06:04:20,112 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 06:04:20,113 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c [2020-12-22 06:04:20,193 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d2d8e20a/826efea518224c12a44091115f98b149/FLAGe5ec38739 [2020-12-22 06:04:21,101 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 06:04:21,102 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c [2020-12-22 06:04:21,127 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d2d8e20a/826efea518224c12a44091115f98b149/FLAGe5ec38739 [2020-12-22 06:04:21,271 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d2d8e20a/826efea518224c12a44091115f98b149 [2020-12-22 06:04:21,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 06:04:21,276 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 06:04:21,278 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 06:04:21,278 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 06:04:21,282 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 06:04:21,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:04:21" (1/1) ... [2020-12-22 06:04:21,285 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1652053d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:04:21, skipping insertion in model container [2020-12-22 06:04:21,285 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:04:21" (1/1) ... [2020-12-22 06:04:21,293 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 06:04:21,361 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 06:04:21,790 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/product-lines/elevator_spec2_product18.cil.c[37727,37740] [2020-12-22 06:04:22,033 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:04:22,053 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 06:04:22,172 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/product-lines/elevator_spec2_product18.cil.c[37727,37740] [2020-12-22 06:04:22,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:04:22,294 INFO L208 MainTranslator]: Completed translation [2020-12-22 06:04:22,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:04:22 WrapperNode [2020-12-22 06:04:22,294 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 06:04:22,296 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 06:04:22,296 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 06:04:22,296 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 06:04:22,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:04:22" (1/1) ... [2020-12-22 06:04:22,339 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:04:22" (1/1) ... [2020-12-22 06:04:22,659 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 06:04:22,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 06:04:22,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 06:04:22,663 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 06:04:22,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:04:22" (1/1) ... [2020-12-22 06:04:22,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:04:22" (1/1) ... [2020-12-22 06:04:22,723 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:04:22" (1/1) ... [2020-12-22 06:04:22,724 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:04:22" (1/1) ... [2020-12-22 06:04:22,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:04:22" (1/1) ... [2020-12-22 06:04:23,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:04:22" (1/1) ... [2020-12-22 06:04:23,078 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:04:22" (1/1) ... [2020-12-22 06:04:23,121 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 06:04:23,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 06:04:23,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 06:04:23,123 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 06:04:23,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:04:22" (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 06:04:23,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 06:04:23,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 06:04:23,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 06:04:23,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 06:04:37,875 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 06:04:37,875 INFO L299 CfgBuilder]: Removed 1029 assume(true) statements. [2020-12-22 06:04:37,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:04:37 BoogieIcfgContainer [2020-12-22 06:04:37,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 06:04:37,884 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 06:04:37,884 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 06:04:37,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 06:04:37,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:04:21" (1/3) ... [2020-12-22 06:04:37,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d516a1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:04:37, skipping insertion in model container [2020-12-22 06:04:37,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:04:22" (2/3) ... [2020-12-22 06:04:37,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d516a1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:04:37, skipping insertion in model container [2020-12-22 06:04:37,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:04:37" (3/3) ... [2020-12-22 06:04:37,893 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product18.cil.c [2020-12-22 06:04:37,903 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 06:04:37,913 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-22 06:04:37,933 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-22 06:04:37,985 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 06:04:37,985 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 06:04:37,985 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 06:04:37,986 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 06:04:37,986 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 06:04:37,986 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 06:04:37,986 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 06:04:37,986 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 06:04:38,066 INFO L276 IsEmpty]: Start isEmpty. Operand 4644 states. [2020-12-22 06:04:38,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 06:04:38,079 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:04:38,080 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] [2020-12-22 06:04:38,080 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:04:38,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:04:38,087 INFO L82 PathProgramCache]: Analyzing trace with hash 380750393, now seen corresponding path program 1 times [2020-12-22 06:04:38,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:04:38,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703049799] [2020-12-22 06:04:38,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:04:38,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:04:38,563 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 06:04:38,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703049799] [2020-12-22 06:04:38,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:04:38,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:04:38,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623335869] [2020-12-22 06:04:38,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:04:38,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:04:38,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:04:38,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:04:38,598 INFO L87 Difference]: Start difference. First operand 4644 states. Second operand 3 states. [2020-12-22 06:04:38,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:04:38,958 INFO L93 Difference]: Finished difference Result 9279 states and 17601 transitions. [2020-12-22 06:04:38,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:04:38,961 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-12-22 06:04:38,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:04:39,037 INFO L225 Difference]: With dead ends: 9279 [2020-12-22 06:04:39,038 INFO L226 Difference]: Without dead ends: 4640 [2020-12-22 06:04:39,056 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 06:04:39,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4640 states. [2020-12-22 06:04:39,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4640 to 4640. [2020-12-22 06:04:39,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4640 states. [2020-12-22 06:04:39,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4640 states to 4640 states and 8791 transitions. [2020-12-22 06:04:39,305 INFO L78 Accepts]: Start accepts. Automaton has 4640 states and 8791 transitions. Word has length 27 [2020-12-22 06:04:39,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:04:39,306 INFO L481 AbstractCegarLoop]: Abstraction has 4640 states and 8791 transitions. [2020-12-22 06:04:39,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:04:39,306 INFO L276 IsEmpty]: Start isEmpty. Operand 4640 states and 8791 transitions. [2020-12-22 06:04:39,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 06:04:39,313 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:04:39,314 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] [2020-12-22 06:04:39,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 06:04:39,318 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:04:39,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:04:39,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1347733051, now seen corresponding path program 1 times [2020-12-22 06:04:39,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:04:39,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831103154] [2020-12-22 06:04:39,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:04:39,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:04:39,632 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 06:04:39,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831103154] [2020-12-22 06:04:39,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:04:39,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 06:04:39,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717770360] [2020-12-22 06:04:39,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:04:39,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:04:39,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:04:39,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:04:39,636 INFO L87 Difference]: Start difference. First operand 4640 states and 8791 transitions. Second operand 6 states. [2020-12-22 06:04:40,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:04:40,059 INFO L93 Difference]: Finished difference Result 9231 states and 17498 transitions. [2020-12-22 06:04:40,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:04:40,060 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-12-22 06:04:40,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:04:40,089 INFO L225 Difference]: With dead ends: 9231 [2020-12-22 06:04:40,089 INFO L226 Difference]: Without dead ends: 4634 [2020-12-22 06:04:40,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:04:40,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4634 states. [2020-12-22 06:04:40,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4634 to 4634. [2020-12-22 06:04:40,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4634 states. [2020-12-22 06:04:40,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4634 states to 4634 states and 8778 transitions. [2020-12-22 06:04:40,278 INFO L78 Accepts]: Start accepts. Automaton has 4634 states and 8778 transitions. Word has length 34 [2020-12-22 06:04:40,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:04:40,279 INFO L481 AbstractCegarLoop]: Abstraction has 4634 states and 8778 transitions. [2020-12-22 06:04:40,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:04:40,279 INFO L276 IsEmpty]: Start isEmpty. Operand 4634 states and 8778 transitions. [2020-12-22 06:04:40,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 06:04:40,281 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:04:40,281 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] [2020-12-22 06:04:40,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 06:04:40,284 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:04:40,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:04:40,287 INFO L82 PathProgramCache]: Analyzing trace with hash -306910237, now seen corresponding path program 1 times [2020-12-22 06:04:40,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:04:40,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610517150] [2020-12-22 06:04:40,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:04:40,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:04:40,415 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 06:04:40,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610517150] [2020-12-22 06:04:40,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:04:40,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:04:40,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51147932] [2020-12-22 06:04:40,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:04:40,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:04:40,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:04:40,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:04:40,430 INFO L87 Difference]: Start difference. First operand 4634 states and 8778 transitions. Second operand 4 states. [2020-12-22 06:04:40,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:04:40,816 INFO L93 Difference]: Finished difference Result 9225 states and 17485 transitions. [2020-12-22 06:04:40,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:04:40,818 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-12-22 06:04:40,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:04:40,846 INFO L225 Difference]: With dead ends: 9225 [2020-12-22 06:04:40,846 INFO L226 Difference]: Without dead ends: 4634 [2020-12-22 06:04:40,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:04:40,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4634 states. [2020-12-22 06:04:41,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4634 to 4634. [2020-12-22 06:04:41,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4634 states. [2020-12-22 06:04:41,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4634 states to 4634 states and 8774 transitions. [2020-12-22 06:04:41,037 INFO L78 Accepts]: Start accepts. Automaton has 4634 states and 8774 transitions. Word has length 35 [2020-12-22 06:04:41,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:04:41,045 INFO L481 AbstractCegarLoop]: Abstraction has 4634 states and 8774 transitions. [2020-12-22 06:04:41,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:04:41,045 INFO L276 IsEmpty]: Start isEmpty. Operand 4634 states and 8774 transitions. [2020-12-22 06:04:41,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 06:04:41,051 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:04:41,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:04:41,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 06:04:41,052 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:04:41,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:04:41,052 INFO L82 PathProgramCache]: Analyzing trace with hash -924529880, now seen corresponding path program 1 times [2020-12-22 06:04:41,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:04:41,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781464962] [2020-12-22 06:04:41,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:04:41,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:04:41,298 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 06:04:41,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781464962] [2020-12-22 06:04:41,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:04:41,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:04:41,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341508831] [2020-12-22 06:04:41,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:04:41,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:04:41,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:04:41,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:04:41,303 INFO L87 Difference]: Start difference. First operand 4634 states and 8774 transitions. Second operand 4 states. [2020-12-22 06:04:41,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:04:41,669 INFO L93 Difference]: Finished difference Result 9225 states and 17481 transitions. [2020-12-22 06:04:41,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:04:41,670 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-12-22 06:04:41,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:04:41,701 INFO L225 Difference]: With dead ends: 9225 [2020-12-22 06:04:41,701 INFO L226 Difference]: Without dead ends: 4634 [2020-12-22 06:04:41,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:04:41,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4634 states. [2020-12-22 06:04:41,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4634 to 4634. [2020-12-22 06:04:41,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4634 states. [2020-12-22 06:04:41,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4634 states to 4634 states and 8770 transitions. [2020-12-22 06:04:41,941 INFO L78 Accepts]: Start accepts. Automaton has 4634 states and 8770 transitions. Word has length 36 [2020-12-22 06:04:41,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:04:41,941 INFO L481 AbstractCegarLoop]: Abstraction has 4634 states and 8770 transitions. [2020-12-22 06:04:41,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:04:41,942 INFO L276 IsEmpty]: Start isEmpty. Operand 4634 states and 8770 transitions. [2020-12-22 06:04:41,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 06:04:41,943 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:04:41,943 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:04:41,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 06:04:41,946 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:04:41,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:04:41,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1476705608, now seen corresponding path program 1 times [2020-12-22 06:04:41,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:04:41,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829175330] [2020-12-22 06:04:41,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:04:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:04:42,033 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 06:04:42,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829175330] [2020-12-22 06:04:42,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:04:42,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:04:42,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210078641] [2020-12-22 06:04:42,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:04:42,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:04:42,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:04:42,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:04:42,036 INFO L87 Difference]: Start difference. First operand 4634 states and 8770 transitions. Second operand 4 states. [2020-12-22 06:04:42,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:04:42,388 INFO L93 Difference]: Finished difference Result 9225 states and 17477 transitions. [2020-12-22 06:04:42,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:04:42,391 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-12-22 06:04:42,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:04:42,445 INFO L225 Difference]: With dead ends: 9225 [2020-12-22 06:04:42,446 INFO L226 Difference]: Without dead ends: 4634 [2020-12-22 06:04:42,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:04:42,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4634 states. [2020-12-22 06:04:42,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4634 to 4634. [2020-12-22 06:04:42,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4634 states. [2020-12-22 06:04:42,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4634 states to 4634 states and 8766 transitions. [2020-12-22 06:04:42,630 INFO L78 Accepts]: Start accepts. Automaton has 4634 states and 8766 transitions. Word has length 37 [2020-12-22 06:04:42,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:04:42,631 INFO L481 AbstractCegarLoop]: Abstraction has 4634 states and 8766 transitions. [2020-12-22 06:04:42,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:04:42,631 INFO L276 IsEmpty]: Start isEmpty. Operand 4634 states and 8766 transitions. [2020-12-22 06:04:42,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 06:04:42,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:04:42,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:04:42,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 06:04:42,633 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:04:42,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:04:42,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1614898744, now seen corresponding path program 1 times [2020-12-22 06:04:42,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:04:42,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124070030] [2020-12-22 06:04:42,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:04:42,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:04:42,734 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 06:04:42,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124070030] [2020-12-22 06:04:42,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:04:42,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:04:42,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73314863] [2020-12-22 06:04:42,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:04:42,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:04:42,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:04:42,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:04:42,736 INFO L87 Difference]: Start difference. First operand 4634 states and 8766 transitions. Second operand 4 states. [2020-12-22 06:04:43,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:04:43,025 INFO L93 Difference]: Finished difference Result 9225 states and 17473 transitions. [2020-12-22 06:04:43,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:04:43,026 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-12-22 06:04:43,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:04:43,043 INFO L225 Difference]: With dead ends: 9225 [2020-12-22 06:04:43,043 INFO L226 Difference]: Without dead ends: 4613 [2020-12-22 06:04:43,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:04:43,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4613 states. [2020-12-22 06:04:43,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4613 to 4613. [2020-12-22 06:04:43,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4613 states. [2020-12-22 06:04:43,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 8732 transitions. [2020-12-22 06:04:43,241 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 8732 transitions. Word has length 37 [2020-12-22 06:04:43,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:04:43,241 INFO L481 AbstractCegarLoop]: Abstraction has 4613 states and 8732 transitions. [2020-12-22 06:04:43,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:04:43,241 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 8732 transitions. [2020-12-22 06:04:43,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 06:04:43,242 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:04:43,243 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:04:43,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 06:04:43,243 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:04:43,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:04:43,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1321797651, now seen corresponding path program 1 times [2020-12-22 06:04:43,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:04:43,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860119780] [2020-12-22 06:04:43,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:04:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:04:43,371 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 06:04:43,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860119780] [2020-12-22 06:04:43,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:04:43,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:04:43,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605088077] [2020-12-22 06:04:43,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:04:43,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:04:43,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:04:43,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:04:43,374 INFO L87 Difference]: Start difference. First operand 4613 states and 8732 transitions. Second operand 4 states. [2020-12-22 06:04:43,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:04:43,627 INFO L93 Difference]: Finished difference Result 9204 states and 17439 transitions. [2020-12-22 06:04:43,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:04:43,628 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-12-22 06:04:43,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:04:43,643 INFO L225 Difference]: With dead ends: 9204 [2020-12-22 06:04:43,643 INFO L226 Difference]: Without dead ends: 4613 [2020-12-22 06:04:43,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:04:43,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4613 states. [2020-12-22 06:04:43,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4613 to 4613. [2020-12-22 06:04:43,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4613 states. [2020-12-22 06:04:43,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 8731 transitions. [2020-12-22 06:04:43,849 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 8731 transitions. Word has length 38 [2020-12-22 06:04:43,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:04:43,849 INFO L481 AbstractCegarLoop]: Abstraction has 4613 states and 8731 transitions. [2020-12-22 06:04:43,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:04:43,849 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 8731 transitions. [2020-12-22 06:04:43,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 06:04:43,852 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:04:43,853 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:04:43,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 06:04:43,853 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:04:43,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:04:43,854 INFO L82 PathProgramCache]: Analyzing trace with hash -2103444819, now seen corresponding path program 1 times [2020-12-22 06:04:43,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:04:43,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623908134] [2020-12-22 06:04:43,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:04:43,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:04:43,949 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 06:04:43,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623908134] [2020-12-22 06:04:43,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:04:43,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:04:43,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308101463] [2020-12-22 06:04:43,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:04:43,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:04:43,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:04:43,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:04:43,953 INFO L87 Difference]: Start difference. First operand 4613 states and 8731 transitions. Second operand 4 states. [2020-12-22 06:04:44,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:04:44,250 INFO L93 Difference]: Finished difference Result 9204 states and 17438 transitions. [2020-12-22 06:04:44,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:04:44,251 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-12-22 06:04:44,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:04:44,266 INFO L225 Difference]: With dead ends: 9204 [2020-12-22 06:04:44,267 INFO L226 Difference]: Without dead ends: 4613 [2020-12-22 06:04:44,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:04:44,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4613 states. [2020-12-22 06:04:44,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4613 to 4613. [2020-12-22 06:04:44,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4613 states. [2020-12-22 06:04:44,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 8730 transitions. [2020-12-22 06:04:44,461 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 8730 transitions. Word has length 39 [2020-12-22 06:04:44,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:04:44,463 INFO L481 AbstractCegarLoop]: Abstraction has 4613 states and 8730 transitions. [2020-12-22 06:04:44,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:04:44,463 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 8730 transitions. [2020-12-22 06:04:44,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 06:04:44,464 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:04:44,464 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:04:44,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 06:04:44,465 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:04:44,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:04:44,466 INFO L82 PathProgramCache]: Analyzing trace with hash -492095310, now seen corresponding path program 1 times [2020-12-22 06:04:44,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:04:44,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904963166] [2020-12-22 06:04:44,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:04:44,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:04:44,579 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 06:04:44,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904963166] [2020-12-22 06:04:44,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:04:44,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:04:44,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550289107] [2020-12-22 06:04:44,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:04:44,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:04:44,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:04:44,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:04:44,588 INFO L87 Difference]: Start difference. First operand 4613 states and 8730 transitions. Second operand 7 states. [2020-12-22 06:04:45,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:04:45,038 INFO L93 Difference]: Finished difference Result 9198 states and 17426 transitions. [2020-12-22 06:04:45,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:04:45,039 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-12-22 06:04:45,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:04:45,056 INFO L225 Difference]: With dead ends: 9198 [2020-12-22 06:04:45,056 INFO L226 Difference]: Without dead ends: 4613 [2020-12-22 06:04:45,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-12-22 06:04:45,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4613 states. [2020-12-22 06:04:45,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4613 to 4613. [2020-12-22 06:04:45,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4613 states. [2020-12-22 06:04:45,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 8729 transitions. [2020-12-22 06:04:45,248 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 8729 transitions. Word has length 40 [2020-12-22 06:04:45,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:04:45,248 INFO L481 AbstractCegarLoop]: Abstraction has 4613 states and 8729 transitions. [2020-12-22 06:04:45,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:04:45,249 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 8729 transitions. [2020-12-22 06:04:45,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 06:04:45,250 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:04:45,250 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:04:45,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 06:04:45,250 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:04:45,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:04:45,251 INFO L82 PathProgramCache]: Analyzing trace with hash -2106017566, now seen corresponding path program 1 times [2020-12-22 06:04:45,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:04:45,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061372803] [2020-12-22 06:04:45,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:04:45,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:04:45,359 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 06:04:45,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061372803] [2020-12-22 06:04:45,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:04:45,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:04:45,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754427493] [2020-12-22 06:04:45,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:04:45,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:04:45,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:04:45,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:04:45,361 INFO L87 Difference]: Start difference. First operand 4613 states and 8729 transitions. Second operand 3 states. [2020-12-22 06:04:45,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:04:45,939 INFO L93 Difference]: Finished difference Result 10917 states and 20679 transitions. [2020-12-22 06:04:45,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:04:45,940 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 06:04:45,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:04:45,965 INFO L225 Difference]: With dead ends: 10917 [2020-12-22 06:04:45,966 INFO L226 Difference]: Without dead ends: 8570 [2020-12-22 06:04:45,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:04:45,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8570 states. [2020-12-22 06:04:46,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8570 to 6471. [2020-12-22 06:04:46,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6471 states. [2020-12-22 06:04:46,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6471 states to 6471 states and 12247 transitions. [2020-12-22 06:04:46,287 INFO L78 Accepts]: Start accepts. Automaton has 6471 states and 12247 transitions. Word has length 41 [2020-12-22 06:04:46,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:04:46,287 INFO L481 AbstractCegarLoop]: Abstraction has 6471 states and 12247 transitions. [2020-12-22 06:04:46,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:04:46,288 INFO L276 IsEmpty]: Start isEmpty. Operand 6471 states and 12247 transitions. [2020-12-22 06:04:46,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 06:04:46,291 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:04:46,291 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:04:46,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 06:04:46,292 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:04:46,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:04:46,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1676293061, now seen corresponding path program 1 times [2020-12-22 06:04:46,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:04:46,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303670199] [2020-12-22 06:04:46,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:04:46,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:04:46,386 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 06:04:46,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303670199] [2020-12-22 06:04:46,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:04:46,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:04:46,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385091531] [2020-12-22 06:04:46,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:04:46,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:04:46,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:04:46,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:04:46,390 INFO L87 Difference]: Start difference. First operand 6471 states and 12247 transitions. Second operand 5 states. [2020-12-22 06:04:47,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:04:47,162 INFO L93 Difference]: Finished difference Result 12849 states and 24148 transitions. [2020-12-22 06:04:47,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:04:47,163 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-12-22 06:04:47,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:04:47,186 INFO L225 Difference]: With dead ends: 12849 [2020-12-22 06:04:47,187 INFO L226 Difference]: Without dead ends: 7546 [2020-12-22 06:04:47,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:04:47,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7546 states. [2020-12-22 06:04:47,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7546 to 5270. [2020-12-22 06:04:47,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5270 states. [2020-12-22 06:04:47,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5270 states to 5270 states and 9916 transitions. [2020-12-22 06:04:47,496 INFO L78 Accepts]: Start accepts. Automaton has 5270 states and 9916 transitions. Word has length 54 [2020-12-22 06:04:47,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:04:47,496 INFO L481 AbstractCegarLoop]: Abstraction has 5270 states and 9916 transitions. [2020-12-22 06:04:47,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:04:47,496 INFO L276 IsEmpty]: Start isEmpty. Operand 5270 states and 9916 transitions. [2020-12-22 06:04:47,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 06:04:47,499 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:04:47,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:04:47,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 06:04:47,500 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:04:47,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:04:47,501 INFO L82 PathProgramCache]: Analyzing trace with hash -920679150, now seen corresponding path program 1 times [2020-12-22 06:04:47,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:04:47,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121653893] [2020-12-22 06:04:47,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:04:47,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:04:47,620 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 06:04:47,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121653893] [2020-12-22 06:04:47,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:04:47,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:04:47,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135239671] [2020-12-22 06:04:47,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:04:47,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:04:47,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:04:47,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:04:47,623 INFO L87 Difference]: Start difference. First operand 5270 states and 9916 transitions. Second operand 5 states. [2020-12-22 06:04:51,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:04:51,541 INFO L93 Difference]: Finished difference Result 21261 states and 39887 transitions. [2020-12-22 06:04:51,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:04:51,542 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 06:04:51,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:04:51,593 INFO L225 Difference]: With dead ends: 21261 [2020-12-22 06:04:51,593 INFO L226 Difference]: Without dead ends: 16037 [2020-12-22 06:04:51,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:04:51,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16037 states. [2020-12-22 06:04:51,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16037 to 5284. [2020-12-22 06:04:51,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5284 states. [2020-12-22 06:04:52,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5284 states to 5284 states and 9930 transitions. [2020-12-22 06:04:52,024 INFO L78 Accepts]: Start accepts. Automaton has 5284 states and 9930 transitions. Word has length 55 [2020-12-22 06:04:52,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:04:52,024 INFO L481 AbstractCegarLoop]: Abstraction has 5284 states and 9930 transitions. [2020-12-22 06:04:52,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:04:52,024 INFO L276 IsEmpty]: Start isEmpty. Operand 5284 states and 9930 transitions. [2020-12-22 06:04:52,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 06:04:52,027 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:04:52,027 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:04:52,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 06:04:52,028 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:04:52,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:04:52,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1154382262, now seen corresponding path program 1 times [2020-12-22 06:04:52,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:04:52,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554296216] [2020-12-22 06:04:52,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:04:52,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:04:52,113 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 06:04:52,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554296216] [2020-12-22 06:04:52,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:04:52,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:04:52,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316551717] [2020-12-22 06:04:52,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:04:52,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:04:52,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:04:52,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:04:52,116 INFO L87 Difference]: Start difference. First operand 5284 states and 9930 transitions. Second operand 4 states. [2020-12-22 06:04:56,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:04:56,268 INFO L93 Difference]: Finished difference Result 15691 states and 29366 transitions. [2020-12-22 06:04:56,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:04:56,269 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-12-22 06:04:56,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:04:56,301 INFO L225 Difference]: With dead ends: 15691 [2020-12-22 06:04:56,301 INFO L226 Difference]: Without dead ends: 10440 [2020-12-22 06:04:56,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:04:56,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10440 states. [2020-12-22 06:04:56,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10440 to 6736. [2020-12-22 06:04:56,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6736 states. [2020-12-22 06:04:56,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6736 states to 6736 states and 12518 transitions. [2020-12-22 06:04:56,752 INFO L78 Accepts]: Start accepts. Automaton has 6736 states and 12518 transitions. Word has length 56 [2020-12-22 06:04:56,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:04:56,752 INFO L481 AbstractCegarLoop]: Abstraction has 6736 states and 12518 transitions. [2020-12-22 06:04:56,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:04:56,752 INFO L276 IsEmpty]: Start isEmpty. Operand 6736 states and 12518 transitions. [2020-12-22 06:04:56,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 06:04:56,754 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:04:56,754 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] [2020-12-22 06:04:56,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 06:04:56,755 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:04:56,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:04:56,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1526979166, now seen corresponding path program 1 times [2020-12-22 06:04:56,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:04:56,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401028602] [2020-12-22 06:04:56,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:04:56,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:04:56,833 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 06:04:56,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401028602] [2020-12-22 06:04:56,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:04:56,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:04:56,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853238850] [2020-12-22 06:04:56,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:04:56,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:04:56,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:04:56,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:04:56,835 INFO L87 Difference]: Start difference. First operand 6736 states and 12518 transitions. Second operand 5 states. [2020-12-22 06:04:58,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:04:58,694 INFO L93 Difference]: Finished difference Result 44873 states and 83707 transitions. [2020-12-22 06:04:58,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 06:04:58,695 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2020-12-22 06:04:58,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:04:58,797 INFO L225 Difference]: With dead ends: 44873 [2020-12-22 06:04:58,798 INFO L226 Difference]: Without dead ends: 38179 [2020-12-22 06:04:58,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:04:58,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38179 states. [2020-12-22 06:04:59,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38179 to 10751. [2020-12-22 06:04:59,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10751 states. [2020-12-22 06:04:59,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10751 states to 10751 states and 20014 transitions. [2020-12-22 06:04:59,794 INFO L78 Accepts]: Start accepts. Automaton has 10751 states and 20014 transitions. Word has length 58 [2020-12-22 06:04:59,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:04:59,794 INFO L481 AbstractCegarLoop]: Abstraction has 10751 states and 20014 transitions. [2020-12-22 06:04:59,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:04:59,795 INFO L276 IsEmpty]: Start isEmpty. Operand 10751 states and 20014 transitions. [2020-12-22 06:04:59,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 06:04:59,796 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:04:59,797 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] [2020-12-22 06:04:59,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 06:04:59,797 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:04:59,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:04:59,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1392965660, now seen corresponding path program 1 times [2020-12-22 06:04:59,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:04:59,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666701903] [2020-12-22 06:04:59,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:04:59,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:04:59,894 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 06:04:59,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666701903] [2020-12-22 06:04:59,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:04:59,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:04:59,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973987727] [2020-12-22 06:04:59,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:04:59,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:04:59,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:04:59,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:04:59,896 INFO L87 Difference]: Start difference. First operand 10751 states and 20014 transitions. Second operand 4 states. [2020-12-22 06:05:01,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:01,333 INFO L93 Difference]: Finished difference Result 32394 states and 60329 transitions. [2020-12-22 06:05:01,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:05:01,334 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-12-22 06:05:01,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:01,384 INFO L225 Difference]: With dead ends: 32394 [2020-12-22 06:05:01,384 INFO L226 Difference]: Without dead ends: 25868 [2020-12-22 06:05:01,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:05:01,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25868 states. [2020-12-22 06:05:02,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25868 to 16542. [2020-12-22 06:05:02,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16542 states. [2020-12-22 06:05:02,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16542 states to 16542 states and 30792 transitions. [2020-12-22 06:05:02,620 INFO L78 Accepts]: Start accepts. Automaton has 16542 states and 30792 transitions. Word has length 58 [2020-12-22 06:05:02,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:02,621 INFO L481 AbstractCegarLoop]: Abstraction has 16542 states and 30792 transitions. [2020-12-22 06:05:02,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:05:02,621 INFO L276 IsEmpty]: Start isEmpty. Operand 16542 states and 30792 transitions. [2020-12-22 06:05:02,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 06:05:02,623 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:02,623 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] [2020-12-22 06:05:02,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 06:05:02,624 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:05:02,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:02,624 INFO L82 PathProgramCache]: Analyzing trace with hash 174664870, now seen corresponding path program 1 times [2020-12-22 06:05:02,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:02,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854070023] [2020-12-22 06:05:02,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:02,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:02,696 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 06:05:02,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854070023] [2020-12-22 06:05:02,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:02,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:05:02,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515355619] [2020-12-22 06:05:02,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:05:02,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:02,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:05:02,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:05:02,698 INFO L87 Difference]: Start difference. First operand 16542 states and 30792 transitions. Second operand 4 states. [2020-12-22 06:05:04,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:04,126 INFO L93 Difference]: Finished difference Result 38284 states and 71196 transitions. [2020-12-22 06:05:04,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:05:04,127 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-12-22 06:05:04,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:04,168 INFO L225 Difference]: With dead ends: 38284 [2020-12-22 06:05:04,169 INFO L226 Difference]: Without dead ends: 26214 [2020-12-22 06:05:04,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:05:04,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26214 states. [2020-12-22 06:05:05,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26214 to 16562. [2020-12-22 06:05:05,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16562 states. [2020-12-22 06:05:05,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16562 states to 16562 states and 30800 transitions. [2020-12-22 06:05:05,229 INFO L78 Accepts]: Start accepts. Automaton has 16562 states and 30800 transitions. Word has length 60 [2020-12-22 06:05:05,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:05,229 INFO L481 AbstractCegarLoop]: Abstraction has 16562 states and 30800 transitions. [2020-12-22 06:05:05,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:05:05,229 INFO L276 IsEmpty]: Start isEmpty. Operand 16562 states and 30800 transitions. [2020-12-22 06:05:05,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 06:05:05,232 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:05,232 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 06:05:05,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 06:05:05,233 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:05:05,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:05,233 INFO L82 PathProgramCache]: Analyzing trace with hash -363167665, now seen corresponding path program 1 times [2020-12-22 06:05:05,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:05,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351152929] [2020-12-22 06:05:05,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:05,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:05,351 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 06:05:05,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351152929] [2020-12-22 06:05:05,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:05,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 06:05:05,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245916131] [2020-12-22 06:05:05,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:05:05,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:05,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:05:05,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:05:05,354 INFO L87 Difference]: Start difference. First operand 16562 states and 30800 transitions. Second operand 7 states. [2020-12-22 06:05:08,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:08,038 INFO L93 Difference]: Finished difference Result 50841 states and 94508 transitions. [2020-12-22 06:05:08,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 06:05:08,038 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 06:05:08,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:08,083 INFO L225 Difference]: With dead ends: 50841 [2020-12-22 06:05:08,083 INFO L226 Difference]: Without dead ends: 38529 [2020-12-22 06:05:08,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-12-22 06:05:08,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38529 states. [2020-12-22 06:05:09,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38529 to 16574. [2020-12-22 06:05:09,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16574 states. [2020-12-22 06:05:09,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16574 states to 16574 states and 30801 transitions. [2020-12-22 06:05:09,120 INFO L78 Accepts]: Start accepts. Automaton has 16574 states and 30801 transitions. Word has length 66 [2020-12-22 06:05:09,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:09,120 INFO L481 AbstractCegarLoop]: Abstraction has 16574 states and 30801 transitions. [2020-12-22 06:05:09,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:05:09,120 INFO L276 IsEmpty]: Start isEmpty. Operand 16574 states and 30801 transitions. [2020-12-22 06:05:09,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 06:05:09,123 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:09,124 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 06:05:09,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 06:05:09,124 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:05:09,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:09,125 INFO L82 PathProgramCache]: Analyzing trace with hash -144312947, now seen corresponding path program 1 times [2020-12-22 06:05:09,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:09,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819093073] [2020-12-22 06:05:09,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:09,217 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 06:05:09,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819093073] [2020-12-22 06:05:09,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:09,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:05:09,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200961466] [2020-12-22 06:05:09,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:05:09,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:09,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:05:09,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:05:09,223 INFO L87 Difference]: Start difference. First operand 16574 states and 30801 transitions. Second operand 5 states. [2020-12-22 06:05:10,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:10,452 INFO L93 Difference]: Finished difference Result 28667 states and 53255 transitions. [2020-12-22 06:05:10,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:05:10,452 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-12-22 06:05:10,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:10,472 INFO L225 Difference]: With dead ends: 28667 [2020-12-22 06:05:10,472 INFO L226 Difference]: Without dead ends: 16601 [2020-12-22 06:05:10,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:05:10,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16601 states. [2020-12-22 06:05:11,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16601 to 16574. [2020-12-22 06:05:11,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16574 states. [2020-12-22 06:05:11,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16574 states to 16574 states and 30762 transitions. [2020-12-22 06:05:11,193 INFO L78 Accepts]: Start accepts. Automaton has 16574 states and 30762 transitions. Word has length 66 [2020-12-22 06:05:11,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:11,193 INFO L481 AbstractCegarLoop]: Abstraction has 16574 states and 30762 transitions. [2020-12-22 06:05:11,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:05:11,194 INFO L276 IsEmpty]: Start isEmpty. Operand 16574 states and 30762 transitions. [2020-12-22 06:05:11,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 06:05:11,196 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:11,196 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 06:05:11,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 06:05:11,196 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:05:11,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:11,197 INFO L82 PathProgramCache]: Analyzing trace with hash -731118961, now seen corresponding path program 1 times [2020-12-22 06:05:11,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:11,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048935921] [2020-12-22 06:05:11,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:11,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:11,263 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 06:05:11,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048935921] [2020-12-22 06:05:11,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:11,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:05:11,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658996434] [2020-12-22 06:05:11,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:05:11,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:11,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:05:11,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:05:11,265 INFO L87 Difference]: Start difference. First operand 16574 states and 30762 transitions. Second operand 3 states. [2020-12-22 06:05:12,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:12,584 INFO L93 Difference]: Finished difference Result 43840 states and 81520 transitions. [2020-12-22 06:05:12,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:05:12,585 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 06:05:12,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:12,629 INFO L225 Difference]: With dead ends: 43840 [2020-12-22 06:05:12,630 INFO L226 Difference]: Without dead ends: 29178 [2020-12-22 06:05:12,645 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 06:05:12,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29178 states. [2020-12-22 06:05:13,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29178 to 29178. [2020-12-22 06:05:13,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29178 states. [2020-12-22 06:05:14,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29178 states to 29178 states and 54314 transitions. [2020-12-22 06:05:14,017 INFO L78 Accepts]: Start accepts. Automaton has 29178 states and 54314 transitions. Word has length 66 [2020-12-22 06:05:14,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:14,017 INFO L481 AbstractCegarLoop]: Abstraction has 29178 states and 54314 transitions. [2020-12-22 06:05:14,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:05:14,017 INFO L276 IsEmpty]: Start isEmpty. Operand 29178 states and 54314 transitions. [2020-12-22 06:05:14,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 06:05:14,020 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:14,020 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 06:05:14,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 06:05:14,020 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:05:14,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:14,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1574565961, now seen corresponding path program 1 times [2020-12-22 06:05:14,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:14,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179539466] [2020-12-22 06:05:14,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:14,126 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 06:05:14,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179539466] [2020-12-22 06:05:14,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:14,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:05:14,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128293449] [2020-12-22 06:05:14,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:05:14,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:14,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:05:14,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:05:14,129 INFO L87 Difference]: Start difference. First operand 29178 states and 54314 transitions. Second operand 6 states. [2020-12-22 06:05:21,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:21,121 INFO L93 Difference]: Finished difference Result 92912 states and 172402 transitions. [2020-12-22 06:05:21,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 06:05:21,122 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-12-22 06:05:21,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:21,219 INFO L225 Difference]: With dead ends: 92912 [2020-12-22 06:05:21,219 INFO L226 Difference]: Without dead ends: 66854 [2020-12-22 06:05:21,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 06:05:21,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66854 states. [2020-12-22 06:05:23,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66854 to 37320. [2020-12-22 06:05:23,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37320 states. [2020-12-22 06:05:23,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37320 states to 37320 states and 69556 transitions. [2020-12-22 06:05:23,149 INFO L78 Accepts]: Start accepts. Automaton has 37320 states and 69556 transitions. Word has length 68 [2020-12-22 06:05:23,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:23,149 INFO L481 AbstractCegarLoop]: Abstraction has 37320 states and 69556 transitions. [2020-12-22 06:05:23,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:05:23,149 INFO L276 IsEmpty]: Start isEmpty. Operand 37320 states and 69556 transitions. [2020-12-22 06:05:23,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 06:05:23,152 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:23,153 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 06:05:23,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 06:05:23,153 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:05:23,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:23,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1889873611, now seen corresponding path program 1 times [2020-12-22 06:05:23,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:23,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107199993] [2020-12-22 06:05:23,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:23,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:23,220 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 06:05:23,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107199993] [2020-12-22 06:05:23,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:23,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:05:23,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892754082] [2020-12-22 06:05:23,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:05:23,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:23,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:05:23,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:05:23,222 INFO L87 Difference]: Start difference. First operand 37320 states and 69556 transitions. Second operand 3 states. [2020-12-22 06:05:25,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:25,945 INFO L93 Difference]: Finished difference Result 99233 states and 185181 transitions. [2020-12-22 06:05:25,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:05:25,946 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 06:05:25,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:26,036 INFO L225 Difference]: With dead ends: 99233 [2020-12-22 06:05:26,036 INFO L226 Difference]: Without dead ends: 69660 [2020-12-22 06:05:26,061 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 06:05:26,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69660 states. [2020-12-22 06:05:29,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69660 to 69658. [2020-12-22 06:05:29,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69658 states. [2020-12-22 06:05:29,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69658 states to 69658 states and 130034 transitions. [2020-12-22 06:05:29,293 INFO L78 Accepts]: Start accepts. Automaton has 69658 states and 130034 transitions. Word has length 68 [2020-12-22 06:05:29,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:29,294 INFO L481 AbstractCegarLoop]: Abstraction has 69658 states and 130034 transitions. [2020-12-22 06:05:29,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:05:29,296 INFO L276 IsEmpty]: Start isEmpty. Operand 69658 states and 130034 transitions. [2020-12-22 06:05:29,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 06:05:29,299 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:29,299 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 06:05:29,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 06:05:29,300 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:05:29,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:29,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1543488584, now seen corresponding path program 1 times [2020-12-22 06:05:29,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:29,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327951667] [2020-12-22 06:05:29,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:29,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:29,364 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 06:05:29,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327951667] [2020-12-22 06:05:29,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:29,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:05:29,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167467972] [2020-12-22 06:05:29,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:05:29,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:29,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:05:29,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:05:29,367 INFO L87 Difference]: Start difference. First operand 69658 states and 130034 transitions. Second operand 3 states. [2020-12-22 06:05:35,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:35,066 INFO L93 Difference]: Finished difference Result 198129 states and 369967 transitions. [2020-12-22 06:05:35,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:05:35,069 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2020-12-22 06:05:35,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:35,468 INFO L225 Difference]: With dead ends: 198129 [2020-12-22 06:05:35,468 INFO L226 Difference]: Without dead ends: 133796 [2020-12-22 06:05:35,527 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 06:05:35,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133796 states. [2020-12-22 06:05:41,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133796 to 133792. [2020-12-22 06:05:41,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133792 states. [2020-12-22 06:05:41,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133792 states to 133792 states and 249942 transitions. [2020-12-22 06:05:41,807 INFO L78 Accepts]: Start accepts. Automaton has 133792 states and 249942 transitions. Word has length 69 [2020-12-22 06:05:41,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:41,807 INFO L481 AbstractCegarLoop]: Abstraction has 133792 states and 249942 transitions. [2020-12-22 06:05:41,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:05:41,808 INFO L276 IsEmpty]: Start isEmpty. Operand 133792 states and 249942 transitions. [2020-12-22 06:05:41,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 06:05:41,813 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:41,813 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 06:05:41,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 06:05:41,813 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:05:41,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:41,814 INFO L82 PathProgramCache]: Analyzing trace with hash 603534238, now seen corresponding path program 1 times [2020-12-22 06:05:41,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:41,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91693407] [2020-12-22 06:05:41,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:41,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:41,909 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 06:05:41,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91693407] [2020-12-22 06:05:41,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:41,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:05:41,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594601861] [2020-12-22 06:05:41,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:05:41,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:41,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:05:41,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:05:41,913 INFO L87 Difference]: Start difference. First operand 133792 states and 249942 transitions. Second operand 3 states. [2020-12-22 06:05:52,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:52,580 INFO L93 Difference]: Finished difference Result 385542 states and 720225 transitions. [2020-12-22 06:05:52,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:05:52,581 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 06:05:52,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:53,290 INFO L225 Difference]: With dead ends: 385542 [2020-12-22 06:05:53,290 INFO L226 Difference]: Without dead ends: 261060 [2020-12-22 06:05:53,403 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 06:05:53,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261060 states. [2020-12-22 06:06:04,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261060 to 261054. [2020-12-22 06:06:04,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261054 states. [2020-12-22 06:06:05,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261054 states to 261054 states and 487818 transitions. [2020-12-22 06:06:05,424 INFO L78 Accepts]: Start accepts. Automaton has 261054 states and 487818 transitions. Word has length 70 [2020-12-22 06:06:05,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:05,424 INFO L481 AbstractCegarLoop]: Abstraction has 261054 states and 487818 transitions. [2020-12-22 06:06:05,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:06:05,425 INFO L276 IsEmpty]: Start isEmpty. Operand 261054 states and 487818 transitions. [2020-12-22 06:06:05,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 06:06:05,447 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:05,448 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 06:06:05,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 06:06:05,450 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:06:05,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:05,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1529720593, now seen corresponding path program 1 times [2020-12-22 06:06:05,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:05,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443486557] [2020-12-22 06:06:05,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:05,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:05,570 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 06:06:05,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443486557] [2020-12-22 06:06:05,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:05,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:06:05,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745766528] [2020-12-22 06:06:05,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:06:05,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:05,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:06:05,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:06:05,576 INFO L87 Difference]: Start difference. First operand 261054 states and 487818 transitions. Second operand 3 states. [2020-12-22 06:06:26,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:26,086 INFO L93 Difference]: Finished difference Result 758179 states and 1416522 transitions. [2020-12-22 06:06:26,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:06:26,086 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-12-22 06:06:26,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:27,700 INFO L225 Difference]: With dead ends: 758179 [2020-12-22 06:06:27,700 INFO L226 Difference]: Without dead ends: 513543 [2020-12-22 06:06:27,931 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 06:06:28,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513543 states.