/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_product24.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 06:06:17,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 06:06:17,167 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 06:06:17,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 06:06:17,211 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 06:06:17,212 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 06:06:17,214 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 06:06:17,217 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 06:06:17,219 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 06:06:17,220 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 06:06:17,221 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 06:06:17,223 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 06:06:17,223 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 06:06:17,225 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 06:06:17,226 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 06:06:17,227 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 06:06:17,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 06:06:17,229 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 06:06:17,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 06:06:17,258 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 06:06:17,264 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 06:06:17,265 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 06:06:17,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 06:06:17,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 06:06:17,271 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 06:06:17,275 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 06:06:17,276 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 06:06:17,277 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 06:06:17,278 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 06:06:17,279 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 06:06:17,279 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 06:06:17,280 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 06:06:17,280 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 06:06:17,281 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 06:06:17,282 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 06:06:17,282 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 06:06:17,283 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 06:06:17,310 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 06:06:17,310 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 06:06:17,312 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 06:06:17,312 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 06:06:17,312 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 06:06:17,312 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 06:06:17,313 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 06:06:17,313 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 06:06:17,313 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 06:06:17,313 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 06:06:17,314 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 06:06:17,314 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 06:06:17,314 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 06:06:17,314 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 06:06:17,315 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 06:06:17,315 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 06:06:17,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 06:06:17,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:06:17,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 06:06:17,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 06:06:17,316 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 06:06:17,316 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 06:06:17,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 06:06:17,317 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 06:06:17,317 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 06:06:17,317 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 06:06:17,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 06:06:17,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 06:06:17,756 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 06:06:17,758 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 06:06:17,759 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 06:06:17,760 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c [2020-12-22 06:06:17,841 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7aae14d4c/7f2f8c853f57444984bd341525807f1e/FLAG6a5d97709 [2020-12-22 06:06:18,634 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 06:06:18,635 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c [2020-12-22 06:06:18,668 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7aae14d4c/7f2f8c853f57444984bd341525807f1e/FLAG6a5d97709 [2020-12-22 06:06:18,788 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7aae14d4c/7f2f8c853f57444984bd341525807f1e [2020-12-22 06:06:18,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 06:06:18,794 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 06:06:18,797 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 06:06:18,797 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 06:06:18,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 06:06:18,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:06:18" (1/1) ... [2020-12-22 06:06:18,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56a50189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:18, skipping insertion in model container [2020-12-22 06:06:18,809 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:06:18" (1/1) ... [2020-12-22 06:06:18,821 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 06:06:18,919 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 06:06:19,532 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_product24.cil.c[63379,63392] [2020-12-22 06:06:19,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:06:19,704 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 06:06:19,805 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_product24.cil.c[63379,63392] [2020-12-22 06:06:19,825 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:06:19,899 INFO L208 MainTranslator]: Completed translation [2020-12-22 06:06:19,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:19 WrapperNode [2020-12-22 06:06:19,900 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 06:06:19,901 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 06:06:19,901 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 06:06:19,901 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 06:06:19,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:19" (1/1) ... [2020-12-22 06:06:19,963 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:19" (1/1) ... [2020-12-22 06:06:20,515 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 06:06:20,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 06:06:20,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 06:06:20,522 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 06:06:20,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:19" (1/1) ... [2020-12-22 06:06:20,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:19" (1/1) ... [2020-12-22 06:06:20,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:19" (1/1) ... [2020-12-22 06:06:20,639 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:19" (1/1) ... [2020-12-22 06:06:21,033 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:19" (1/1) ... [2020-12-22 06:06:21,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:19" (1/1) ... [2020-12-22 06:06:21,285 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:19" (1/1) ... [2020-12-22 06:06:21,374 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 06:06:21,375 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 06:06:21,375 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 06:06:21,375 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 06:06:21,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:19" (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 06:06:21,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 06:06:21,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 06:06:21,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 06:06:21,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 06:06:36,072 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 06:06:36,073 INFO L299 CfgBuilder]: Removed 1613 assume(true) statements. [2020-12-22 06:06:36,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:06:36 BoogieIcfgContainer [2020-12-22 06:06:36,083 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 06:06:36,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 06:06:36,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 06:06:36,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 06:06:36,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:06:18" (1/3) ... [2020-12-22 06:06:36,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ded89bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:06:36, skipping insertion in model container [2020-12-22 06:06:36,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:19" (2/3) ... [2020-12-22 06:06:36,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ded89bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:06:36, skipping insertion in model container [2020-12-22 06:06:36,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:06:36" (3/3) ... [2020-12-22 06:06:36,094 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product24.cil.c [2020-12-22 06:06:36,101 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 06:06:36,112 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-22 06:06:36,134 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-22 06:06:36,190 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 06:06:36,190 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 06:06:36,190 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 06:06:36,190 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 06:06:36,190 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 06:06:36,191 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 06:06:36,191 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 06:06:36,191 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 06:06:36,306 INFO L276 IsEmpty]: Start isEmpty. Operand 6972 states. [2020-12-22 06:06:36,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 06:06:36,317 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:36,319 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 06:06:36,319 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 06:06:36,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:36,326 INFO L82 PathProgramCache]: Analyzing trace with hash 100278991, now seen corresponding path program 1 times [2020-12-22 06:06:36,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:36,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550923631] [2020-12-22 06:06:36,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:36,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:36,800 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 06:06:36,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550923631] [2020-12-22 06:06:36,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:36,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:06:36,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753568232] [2020-12-22 06:06:36,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:06:36,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:36,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:06:36,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:06:36,827 INFO L87 Difference]: Start difference. First operand 6972 states. Second operand 3 states. [2020-12-22 06:06:37,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:37,288 INFO L93 Difference]: Finished difference Result 13935 states and 26329 transitions. [2020-12-22 06:06:37,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:06:37,290 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-12-22 06:06:37,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:37,390 INFO L225 Difference]: With dead ends: 13935 [2020-12-22 06:06:37,391 INFO L226 Difference]: Without dead ends: 6968 [2020-12-22 06:06:37,410 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 06:06:37,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6968 states. [2020-12-22 06:06:37,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6968 to 6968. [2020-12-22 06:06:37,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6968 states. [2020-12-22 06:06:37,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6968 states to 6968 states and 13155 transitions. [2020-12-22 06:06:37,735 INFO L78 Accepts]: Start accepts. Automaton has 6968 states and 13155 transitions. Word has length 27 [2020-12-22 06:06:37,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:37,735 INFO L481 AbstractCegarLoop]: Abstraction has 6968 states and 13155 transitions. [2020-12-22 06:06:37,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:06:37,736 INFO L276 IsEmpty]: Start isEmpty. Operand 6968 states and 13155 transitions. [2020-12-22 06:06:37,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 06:06:37,746 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:37,746 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 06:06:37,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 06:06:37,747 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 06:06:37,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:37,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1275802363, now seen corresponding path program 1 times [2020-12-22 06:06:37,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:37,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118909696] [2020-12-22 06:06:37,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:37,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:37,939 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 06:06:37,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118909696] [2020-12-22 06:06:37,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:37,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 06:06:37,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898602835] [2020-12-22 06:06:37,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:06:37,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:37,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:06:37,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:06:37,943 INFO L87 Difference]: Start difference. First operand 6968 states and 13155 transitions. Second operand 6 states. [2020-12-22 06:06:38,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:38,500 INFO L93 Difference]: Finished difference Result 13887 states and 26226 transitions. [2020-12-22 06:06:38,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:06:38,501 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-12-22 06:06:38,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:38,543 INFO L225 Difference]: With dead ends: 13887 [2020-12-22 06:06:38,543 INFO L226 Difference]: Without dead ends: 6962 [2020-12-22 06:06:38,764 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 06:06:38,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6962 states. [2020-12-22 06:06:39,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6962 to 6962. [2020-12-22 06:06:39,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6962 states. [2020-12-22 06:06:39,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6962 states to 6962 states and 13142 transitions. [2020-12-22 06:06:39,048 INFO L78 Accepts]: Start accepts. Automaton has 6962 states and 13142 transitions. Word has length 34 [2020-12-22 06:06:39,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:39,049 INFO L481 AbstractCegarLoop]: Abstraction has 6962 states and 13142 transitions. [2020-12-22 06:06:39,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:06:39,050 INFO L276 IsEmpty]: Start isEmpty. Operand 6962 states and 13142 transitions. [2020-12-22 06:06:39,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 06:06:39,052 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:39,052 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 06:06:39,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 06:06:39,054 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 06:06:39,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:39,056 INFO L82 PathProgramCache]: Analyzing trace with hash -234979549, now seen corresponding path program 1 times [2020-12-22 06:06:39,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:39,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684043384] [2020-12-22 06:06:39,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:39,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:39,447 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 06:06:39,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684043384] [2020-12-22 06:06:39,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:39,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:06:39,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548033490] [2020-12-22 06:06:39,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:06:39,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:39,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:06:39,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:06:39,450 INFO L87 Difference]: Start difference. First operand 6962 states and 13142 transitions. Second operand 4 states. [2020-12-22 06:06:39,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:39,894 INFO L93 Difference]: Finished difference Result 13881 states and 26213 transitions. [2020-12-22 06:06:39,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:06:39,895 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-12-22 06:06:39,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:39,936 INFO L225 Difference]: With dead ends: 13881 [2020-12-22 06:06:39,936 INFO L226 Difference]: Without dead ends: 6962 [2020-12-22 06:06:39,950 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 06:06:39,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6962 states. [2020-12-22 06:06:40,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6962 to 6962. [2020-12-22 06:06:40,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6962 states. [2020-12-22 06:06:40,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6962 states to 6962 states and 13138 transitions. [2020-12-22 06:06:40,347 INFO L78 Accepts]: Start accepts. Automaton has 6962 states and 13138 transitions. Word has length 35 [2020-12-22 06:06:40,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:40,355 INFO L481 AbstractCegarLoop]: Abstraction has 6962 states and 13138 transitions. [2020-12-22 06:06:40,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:06:40,355 INFO L276 IsEmpty]: Start isEmpty. Operand 6962 states and 13138 transitions. [2020-12-22 06:06:40,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 06:06:40,360 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:40,360 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 06:06:40,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 06:06:40,361 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 06:06:40,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:40,362 INFO L82 PathProgramCache]: Analyzing trace with hash -852599192, now seen corresponding path program 1 times [2020-12-22 06:06:40,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:40,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355492008] [2020-12-22 06:06:40,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:40,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:40,476 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 06:06:40,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355492008] [2020-12-22 06:06:40,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:40,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:06:40,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758813104] [2020-12-22 06:06:40,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:06:40,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:40,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:06:40,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:06:40,482 INFO L87 Difference]: Start difference. First operand 6962 states and 13138 transitions. Second operand 4 states. [2020-12-22 06:06:41,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:41,030 INFO L93 Difference]: Finished difference Result 13881 states and 26209 transitions. [2020-12-22 06:06:41,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:06:41,031 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-12-22 06:06:41,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:41,076 INFO L225 Difference]: With dead ends: 13881 [2020-12-22 06:06:41,076 INFO L226 Difference]: Without dead ends: 6962 [2020-12-22 06:06:41,088 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 06:06:41,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6962 states. [2020-12-22 06:06:41,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6962 to 6962. [2020-12-22 06:06:41,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6962 states. [2020-12-22 06:06:41,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6962 states to 6962 states and 13134 transitions. [2020-12-22 06:06:41,315 INFO L78 Accepts]: Start accepts. Automaton has 6962 states and 13134 transitions. Word has length 36 [2020-12-22 06:06:41,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:41,315 INFO L481 AbstractCegarLoop]: Abstraction has 6962 states and 13134 transitions. [2020-12-22 06:06:41,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:06:41,316 INFO L276 IsEmpty]: Start isEmpty. Operand 6962 states and 13134 transitions. [2020-12-22 06:06:41,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 06:06:41,317 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:41,317 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 06:06:41,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 06:06:41,320 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 06:06:41,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:41,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1548636296, now seen corresponding path program 1 times [2020-12-22 06:06:41,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:41,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045413943] [2020-12-22 06:06:41,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:41,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:41,416 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 06:06:41,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045413943] [2020-12-22 06:06:41,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:41,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:06:41,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530585860] [2020-12-22 06:06:41,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:06:41,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:41,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:06:41,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:06:41,420 INFO L87 Difference]: Start difference. First operand 6962 states and 13134 transitions. Second operand 4 states. [2020-12-22 06:06:41,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:41,896 INFO L93 Difference]: Finished difference Result 13881 states and 26205 transitions. [2020-12-22 06:06:41,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:06:41,899 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-12-22 06:06:41,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:41,923 INFO L225 Difference]: With dead ends: 13881 [2020-12-22 06:06:41,924 INFO L226 Difference]: Without dead ends: 6962 [2020-12-22 06:06:41,936 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 06:06:41,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6962 states. [2020-12-22 06:06:42,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6962 to 6962. [2020-12-22 06:06:42,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6962 states. [2020-12-22 06:06:42,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6962 states to 6962 states and 13130 transitions. [2020-12-22 06:06:42,266 INFO L78 Accepts]: Start accepts. Automaton has 6962 states and 13130 transitions. Word has length 37 [2020-12-22 06:06:42,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:42,267 INFO L481 AbstractCegarLoop]: Abstraction has 6962 states and 13130 transitions. [2020-12-22 06:06:42,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:06:42,267 INFO L276 IsEmpty]: Start isEmpty. Operand 6962 states and 13130 transitions. [2020-12-22 06:06:42,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 06:06:42,268 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:42,268 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 06:06:42,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 06:06:42,269 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 06:06:42,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:42,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1542968056, now seen corresponding path program 1 times [2020-12-22 06:06:42,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:42,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185990152] [2020-12-22 06:06:42,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:42,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:42,349 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 06:06:42,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185990152] [2020-12-22 06:06:42,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:42,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:06:42,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015429726] [2020-12-22 06:06:42,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:06:42,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:42,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:06:42,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:06:42,352 INFO L87 Difference]: Start difference. First operand 6962 states and 13130 transitions. Second operand 4 states. [2020-12-22 06:06:42,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:42,678 INFO L93 Difference]: Finished difference Result 13881 states and 26201 transitions. [2020-12-22 06:06:42,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:06:42,679 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-12-22 06:06:42,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:42,703 INFO L225 Difference]: With dead ends: 13881 [2020-12-22 06:06:42,704 INFO L226 Difference]: Without dead ends: 6941 [2020-12-22 06:06:42,717 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 06:06:42,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6941 states. [2020-12-22 06:06:43,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6941 to 6941. [2020-12-22 06:06:43,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6941 states. [2020-12-22 06:06:43,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6941 states to 6941 states and 13096 transitions. [2020-12-22 06:06:43,144 INFO L78 Accepts]: Start accepts. Automaton has 6941 states and 13096 transitions. Word has length 37 [2020-12-22 06:06:43,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:43,145 INFO L481 AbstractCegarLoop]: Abstraction has 6941 states and 13096 transitions. [2020-12-22 06:06:43,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:06:43,145 INFO L276 IsEmpty]: Start isEmpty. Operand 6941 states and 13096 transitions. [2020-12-22 06:06:43,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 06:06:43,146 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:43,146 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 06:06:43,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 06:06:43,147 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 06:06:43,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:43,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1249866963, now seen corresponding path program 1 times [2020-12-22 06:06:43,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:43,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360836882] [2020-12-22 06:06:43,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:43,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:43,255 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 06:06:43,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360836882] [2020-12-22 06:06:43,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:43,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:06:43,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091058513] [2020-12-22 06:06:43,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:06:43,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:43,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:06:43,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:06:43,258 INFO L87 Difference]: Start difference. First operand 6941 states and 13096 transitions. Second operand 4 states. [2020-12-22 06:06:43,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:43,692 INFO L93 Difference]: Finished difference Result 13860 states and 26167 transitions. [2020-12-22 06:06:43,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:06:43,693 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-12-22 06:06:43,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:43,720 INFO L225 Difference]: With dead ends: 13860 [2020-12-22 06:06:43,720 INFO L226 Difference]: Without dead ends: 6941 [2020-12-22 06:06:43,735 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 06:06:43,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6941 states. [2020-12-22 06:06:44,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6941 to 6941. [2020-12-22 06:06:44,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6941 states. [2020-12-22 06:06:44,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6941 states to 6941 states and 13095 transitions. [2020-12-22 06:06:44,153 INFO L78 Accepts]: Start accepts. Automaton has 6941 states and 13095 transitions. Word has length 38 [2020-12-22 06:06:44,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:44,154 INFO L481 AbstractCegarLoop]: Abstraction has 6941 states and 13095 transitions. [2020-12-22 06:06:44,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:06:44,154 INFO L276 IsEmpty]: Start isEmpty. Operand 6941 states and 13095 transitions. [2020-12-22 06:06:44,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 06:06:44,156 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:44,157 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 06:06:44,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 06:06:44,157 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 06:06:44,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:44,158 INFO L82 PathProgramCache]: Analyzing trace with hash -2031514131, now seen corresponding path program 1 times [2020-12-22 06:06:44,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:44,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856748716] [2020-12-22 06:06:44,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:44,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:44,260 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 06:06:44,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856748716] [2020-12-22 06:06:44,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:44,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:06:44,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504087912] [2020-12-22 06:06:44,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:06:44,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:44,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:06:44,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:06:44,264 INFO L87 Difference]: Start difference. First operand 6941 states and 13095 transitions. Second operand 4 states. [2020-12-22 06:06:44,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:44,586 INFO L93 Difference]: Finished difference Result 13860 states and 26166 transitions. [2020-12-22 06:06:44,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:06:44,587 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-12-22 06:06:44,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:44,610 INFO L225 Difference]: With dead ends: 13860 [2020-12-22 06:06:44,611 INFO L226 Difference]: Without dead ends: 6941 [2020-12-22 06:06:44,624 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 06:06:44,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6941 states. [2020-12-22 06:06:44,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6941 to 6941. [2020-12-22 06:06:44,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6941 states. [2020-12-22 06:06:45,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6941 states to 6941 states and 13094 transitions. [2020-12-22 06:06:45,006 INFO L78 Accepts]: Start accepts. Automaton has 6941 states and 13094 transitions. Word has length 39 [2020-12-22 06:06:45,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:45,008 INFO L481 AbstractCegarLoop]: Abstraction has 6941 states and 13094 transitions. [2020-12-22 06:06:45,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:06:45,008 INFO L276 IsEmpty]: Start isEmpty. Operand 6941 states and 13094 transitions. [2020-12-22 06:06:45,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 06:06:45,016 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:45,017 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 06:06:45,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 06:06:45,017 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 06:06:45,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:45,018 INFO L82 PathProgramCache]: Analyzing trace with hash -420164622, now seen corresponding path program 1 times [2020-12-22 06:06:45,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:45,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940607121] [2020-12-22 06:06:45,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:45,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:45,111 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 06:06:45,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940607121] [2020-12-22 06:06:45,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:45,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:06:45,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353002247] [2020-12-22 06:06:45,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:06:45,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:45,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:06:45,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:06:45,120 INFO L87 Difference]: Start difference. First operand 6941 states and 13094 transitions. Second operand 7 states. [2020-12-22 06:06:45,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:45,599 INFO L93 Difference]: Finished difference Result 13854 states and 26154 transitions. [2020-12-22 06:06:45,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:06:45,600 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-12-22 06:06:45,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:45,621 INFO L225 Difference]: With dead ends: 13854 [2020-12-22 06:06:45,621 INFO L226 Difference]: Without dead ends: 6941 [2020-12-22 06:06:45,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-12-22 06:06:45,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6941 states. [2020-12-22 06:06:45,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6941 to 6941. [2020-12-22 06:06:45,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6941 states. [2020-12-22 06:06:45,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6941 states to 6941 states and 13093 transitions. [2020-12-22 06:06:45,879 INFO L78 Accepts]: Start accepts. Automaton has 6941 states and 13093 transitions. Word has length 40 [2020-12-22 06:06:45,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:45,880 INFO L481 AbstractCegarLoop]: Abstraction has 6941 states and 13093 transitions. [2020-12-22 06:06:45,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:06:45,880 INFO L276 IsEmpty]: Start isEmpty. Operand 6941 states and 13093 transitions. [2020-12-22 06:06:45,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 06:06:45,882 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:45,882 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 06:06:45,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 06:06:45,882 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 06:06:45,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:45,883 INFO L82 PathProgramCache]: Analyzing trace with hash -2034086878, now seen corresponding path program 1 times [2020-12-22 06:06:45,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:45,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129783587] [2020-12-22 06:06:45,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:45,957 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 06:06:45,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129783587] [2020-12-22 06:06:45,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:45,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:06:45,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276786128] [2020-12-22 06:06:45,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:06:45,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:45,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:06:45,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:06:45,959 INFO L87 Difference]: Start difference. First operand 6941 states and 13093 transitions. Second operand 3 states. [2020-12-22 06:06:46,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:46,709 INFO L93 Difference]: Finished difference Result 15573 states and 29407 transitions. [2020-12-22 06:06:46,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:06:46,710 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 06:06:46,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:46,766 INFO L225 Difference]: With dead ends: 15573 [2020-12-22 06:06:46,767 INFO L226 Difference]: Without dead ends: 12062 [2020-12-22 06:06:46,777 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 06:06:46,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12062 states. [2020-12-22 06:06:47,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12062 to 9963. [2020-12-22 06:06:47,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9963 states. [2020-12-22 06:06:47,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9963 states to 9963 states and 18793 transitions. [2020-12-22 06:06:47,389 INFO L78 Accepts]: Start accepts. Automaton has 9963 states and 18793 transitions. Word has length 41 [2020-12-22 06:06:47,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:47,390 INFO L481 AbstractCegarLoop]: Abstraction has 9963 states and 18793 transitions. [2020-12-22 06:06:47,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:06:47,390 INFO L276 IsEmpty]: Start isEmpty. Operand 9963 states and 18793 transitions. [2020-12-22 06:06:47,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 06:06:47,398 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:47,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:06:47,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 06:06:47,398 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 06:06:47,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:47,399 INFO L82 PathProgramCache]: Analyzing trace with hash 2082230644, now seen corresponding path program 1 times [2020-12-22 06:06:47,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:47,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253064898] [2020-12-22 06:06:47,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:47,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:47,543 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 06:06:47,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253064898] [2020-12-22 06:06:47,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:47,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:06:47,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548711122] [2020-12-22 06:06:47,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 06:06:47,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:47,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 06:06:47,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:06:47,548 INFO L87 Difference]: Start difference. First operand 9963 states and 18793 transitions. Second operand 8 states. [2020-12-22 06:06:49,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:49,238 INFO L93 Difference]: Finished difference Result 21933 states and 41143 transitions. [2020-12-22 06:06:49,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 06:06:49,238 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-12-22 06:06:49,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:49,280 INFO L225 Difference]: With dead ends: 21933 [2020-12-22 06:06:49,280 INFO L226 Difference]: Without dead ends: 13182 [2020-12-22 06:06:49,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2020-12-22 06:06:49,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13182 states. [2020-12-22 06:06:49,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13182 to 8268. [2020-12-22 06:06:49,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8268 states. [2020-12-22 06:06:49,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8268 states to 8268 states and 15521 transitions. [2020-12-22 06:06:49,850 INFO L78 Accepts]: Start accepts. Automaton has 8268 states and 15521 transitions. Word has length 60 [2020-12-22 06:06:49,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:49,851 INFO L481 AbstractCegarLoop]: Abstraction has 8268 states and 15521 transitions. [2020-12-22 06:06:49,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 06:06:49,851 INFO L276 IsEmpty]: Start isEmpty. Operand 8268 states and 15521 transitions. [2020-12-22 06:06:49,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 06:06:49,854 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:49,855 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] [2020-12-22 06:06:49,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 06:06:49,855 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 06:06:49,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:49,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1389818566, now seen corresponding path program 1 times [2020-12-22 06:06:49,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:49,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273033075] [2020-12-22 06:06:49,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:49,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:49,927 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 06:06:49,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273033075] [2020-12-22 06:06:49,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:49,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:06:49,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579687506] [2020-12-22 06:06:49,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:06:49,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:49,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:06:49,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:06:49,929 INFO L87 Difference]: Start difference. First operand 8268 states and 15521 transitions. Second operand 4 states. [2020-12-22 06:06:54,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:54,179 INFO L93 Difference]: Finished difference Result 22341 states and 41874 transitions. [2020-12-22 06:06:54,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:06:54,180 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-12-22 06:06:54,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:54,231 INFO L225 Difference]: With dead ends: 22341 [2020-12-22 06:06:54,231 INFO L226 Difference]: Without dead ends: 14110 [2020-12-22 06:06:54,248 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 06:06:54,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14110 states. [2020-12-22 06:06:54,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14110 to 8268. [2020-12-22 06:06:54,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8268 states. [2020-12-22 06:06:54,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8268 states to 8268 states and 15116 transitions. [2020-12-22 06:06:54,841 INFO L78 Accepts]: Start accepts. Automaton has 8268 states and 15116 transitions. Word has length 61 [2020-12-22 06:06:54,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:54,842 INFO L481 AbstractCegarLoop]: Abstraction has 8268 states and 15116 transitions. [2020-12-22 06:06:54,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:06:54,842 INFO L276 IsEmpty]: Start isEmpty. Operand 8268 states and 15116 transitions. [2020-12-22 06:06:54,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 06:06:54,846 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:54,847 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 06:06:54,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 06:06:54,847 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 06:06:54,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:54,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1768436262, now seen corresponding path program 1 times [2020-12-22 06:06:54,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:54,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578816205] [2020-12-22 06:06:54,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:54,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:55,095 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 06:06:55,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578816205] [2020-12-22 06:06:55,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:55,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:06:55,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185410831] [2020-12-22 06:06:55,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:06:55,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:55,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:06:55,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:06:55,098 INFO L87 Difference]: Start difference. First operand 8268 states and 15116 transitions. Second operand 6 states. [2020-12-22 06:07:03,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:03,753 INFO L93 Difference]: Finished difference Result 57779 states and 106874 transitions. [2020-12-22 06:07:03,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 06:07:03,754 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-12-22 06:07:03,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:03,955 INFO L225 Difference]: With dead ends: 57779 [2020-12-22 06:07:03,955 INFO L226 Difference]: Without dead ends: 49575 [2020-12-22 06:07:03,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-12-22 06:07:04,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49575 states. [2020-12-22 06:07:05,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49575 to 16311. [2020-12-22 06:07:05,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16311 states. [2020-12-22 06:07:05,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16311 states to 16311 states and 29863 transitions. [2020-12-22 06:07:05,155 INFO L78 Accepts]: Start accepts. Automaton has 16311 states and 29863 transitions. Word has length 69 [2020-12-22 06:07:05,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:05,155 INFO L481 AbstractCegarLoop]: Abstraction has 16311 states and 29863 transitions. [2020-12-22 06:07:05,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:07:05,155 INFO L276 IsEmpty]: Start isEmpty. Operand 16311 states and 29863 transitions. [2020-12-22 06:07:05,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 06:07:05,162 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:05,163 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:07:05,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 06:07:05,163 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 06:07:05,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:05,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1752938839, now seen corresponding path program 1 times [2020-12-22 06:07:05,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:05,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85256193] [2020-12-22 06:07:05,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:05,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:05,246 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 06:07:05,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85256193] [2020-12-22 06:07:05,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:05,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:07:05,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080283138] [2020-12-22 06:07:05,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:07:05,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:05,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:07:05,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:07:05,248 INFO L87 Difference]: Start difference. First operand 16311 states and 29863 transitions. Second operand 3 states. [2020-12-22 06:07:06,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:06,552 INFO L93 Difference]: Finished difference Result 40699 states and 74383 transitions. [2020-12-22 06:07:06,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:07:06,553 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 06:07:06,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:06,617 INFO L225 Difference]: With dead ends: 40699 [2020-12-22 06:07:06,617 INFO L226 Difference]: Without dead ends: 28462 [2020-12-22 06:07:06,640 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 06:07:06,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28462 states. [2020-12-22 06:07:08,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28462 to 28431. [2020-12-22 06:07:08,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28431 states. [2020-12-22 06:07:08,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28431 states to 28431 states and 51961 transitions. [2020-12-22 06:07:08,061 INFO L78 Accepts]: Start accepts. Automaton has 28431 states and 51961 transitions. Word has length 72 [2020-12-22 06:07:08,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:08,062 INFO L481 AbstractCegarLoop]: Abstraction has 28431 states and 51961 transitions. [2020-12-22 06:07:08,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:07:08,062 INFO L276 IsEmpty]: Start isEmpty. Operand 28431 states and 51961 transitions. [2020-12-22 06:07:08,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 06:07:08,068 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:08,068 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:07:08,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 06:07:08,069 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 06:07:08,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:08,069 INFO L82 PathProgramCache]: Analyzing trace with hash 560863239, now seen corresponding path program 1 times [2020-12-22 06:07:08,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:08,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341688634] [2020-12-22 06:07:08,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:08,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:08,151 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 06:07:08,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341688634] [2020-12-22 06:07:08,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:08,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:07:08,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74154060] [2020-12-22 06:07:08,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:07:08,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:08,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:07:08,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:07:08,154 INFO L87 Difference]: Start difference. First operand 28431 states and 51961 transitions. Second operand 5 states. [2020-12-22 06:07:09,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:09,699 INFO L93 Difference]: Finished difference Result 52763 states and 96345 transitions. [2020-12-22 06:07:09,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:07:09,699 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-12-22 06:07:09,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:09,766 INFO L225 Difference]: With dead ends: 52763 [2020-12-22 06:07:09,766 INFO L226 Difference]: Without dead ends: 28462 [2020-12-22 06:07:09,790 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 06:07:09,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28462 states. [2020-12-22 06:07:11,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28462 to 28431. [2020-12-22 06:07:11,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28431 states. [2020-12-22 06:07:11,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28431 states to 28431 states and 51915 transitions. [2020-12-22 06:07:11,085 INFO L78 Accepts]: Start accepts. Automaton has 28431 states and 51915 transitions. Word has length 73 [2020-12-22 06:07:11,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:11,085 INFO L481 AbstractCegarLoop]: Abstraction has 28431 states and 51915 transitions. [2020-12-22 06:07:11,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:07:11,085 INFO L276 IsEmpty]: Start isEmpty. Operand 28431 states and 51915 transitions. [2020-12-22 06:07:11,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 06:07:11,092 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:11,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:07:11,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 06:07:11,092 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 06:07:11,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:11,093 INFO L82 PathProgramCache]: Analyzing trace with hash -25942775, now seen corresponding path program 1 times [2020-12-22 06:07:11,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:11,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10321891] [2020-12-22 06:07:11,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:11,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:11,166 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 06:07:11,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10321891] [2020-12-22 06:07:11,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:11,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:07:11,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696469204] [2020-12-22 06:07:11,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:07:11,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:11,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:07:11,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:07:11,168 INFO L87 Difference]: Start difference. First operand 28431 states and 51915 transitions. Second operand 3 states. [2020-12-22 06:07:13,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:13,535 INFO L93 Difference]: Finished difference Result 68263 states and 124839 transitions. [2020-12-22 06:07:13,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:07:13,536 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 73 [2020-12-22 06:07:13,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:13,619 INFO L225 Difference]: With dead ends: 68263 [2020-12-22 06:07:13,619 INFO L226 Difference]: Without dead ends: 43856 [2020-12-22 06:07:13,648 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 06:07:13,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43856 states. [2020-12-22 06:07:15,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43856 to 43856. [2020-12-22 06:07:15,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43856 states. [2020-12-22 06:07:15,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43856 states to 43856 states and 80328 transitions. [2020-12-22 06:07:15,749 INFO L78 Accepts]: Start accepts. Automaton has 43856 states and 80328 transitions. Word has length 73 [2020-12-22 06:07:15,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:15,749 INFO L481 AbstractCegarLoop]: Abstraction has 43856 states and 80328 transitions. [2020-12-22 06:07:15,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:07:15,750 INFO L276 IsEmpty]: Start isEmpty. Operand 43856 states and 80328 transitions. [2020-12-22 06:07:15,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 06:07:15,755 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:15,756 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:07:15,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 06:07:15,756 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 06:07:15,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:15,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1625611911, now seen corresponding path program 1 times [2020-12-22 06:07:15,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:15,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330912279] [2020-12-22 06:07:15,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:15,835 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 06:07:15,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330912279] [2020-12-22 06:07:15,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:15,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:07:15,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645717425] [2020-12-22 06:07:15,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:07:15,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:15,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:07:15,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:07:15,838 INFO L87 Difference]: Start difference. First operand 43856 states and 80328 transitions. Second operand 3 states. [2020-12-22 06:07:18,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:18,745 INFO L93 Difference]: Finished difference Result 113097 states and 207335 transitions. [2020-12-22 06:07:18,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:07:18,746 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2020-12-22 06:07:18,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:18,863 INFO L225 Difference]: With dead ends: 113097 [2020-12-22 06:07:18,863 INFO L226 Difference]: Without dead ends: 74491 [2020-12-22 06:07:18,903 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 06:07:18,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74491 states. [2020-12-22 06:07:22,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74491 to 74489. [2020-12-22 06:07:22,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74489 states. [2020-12-22 06:07:22,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74489 states to 74489 states and 136738 transitions. [2020-12-22 06:07:22,201 INFO L78 Accepts]: Start accepts. Automaton has 74489 states and 136738 transitions. Word has length 75 [2020-12-22 06:07:22,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:22,209 INFO L481 AbstractCegarLoop]: Abstraction has 74489 states and 136738 transitions. [2020-12-22 06:07:22,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:07:22,210 INFO L276 IsEmpty]: Start isEmpty. Operand 74489 states and 136738 transitions. [2020-12-22 06:07:22,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 06:07:22,215 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:22,215 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:07:22,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 06:07:22,216 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 06:07:22,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:22,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1964765860, now seen corresponding path program 1 times [2020-12-22 06:07:22,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:22,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774790793] [2020-12-22 06:07:22,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:22,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:22,285 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 06:07:22,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774790793] [2020-12-22 06:07:22,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:22,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:07:22,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282694979] [2020-12-22 06:07:22,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:07:22,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:22,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:07:22,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:07:22,287 INFO L87 Difference]: Start difference. First operand 74489 states and 136738 transitions. Second operand 3 states. [2020-12-22 06:07:27,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:27,524 INFO L93 Difference]: Finished difference Result 202309 states and 371452 transitions. [2020-12-22 06:07:27,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:07:27,525 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 06:07:27,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:27,947 INFO L225 Difference]: With dead ends: 202309 [2020-12-22 06:07:27,947 INFO L226 Difference]: Without dead ends: 135296 [2020-12-22 06:07:28,023 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 06:07:28,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135296 states. [2020-12-22 06:07:33,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135296 to 135292. [2020-12-22 06:07:33,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135292 states. [2020-12-22 06:07:33,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135292 states to 135292 states and 248668 transitions. [2020-12-22 06:07:33,905 INFO L78 Accepts]: Start accepts. Automaton has 135292 states and 248668 transitions. Word has length 76 [2020-12-22 06:07:33,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:33,906 INFO L481 AbstractCegarLoop]: Abstraction has 135292 states and 248668 transitions. [2020-12-22 06:07:33,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:07:33,906 INFO L276 IsEmpty]: Start isEmpty. Operand 135292 states and 248668 transitions. [2020-12-22 06:07:33,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 06:07:33,911 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:33,911 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:07:33,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 06:07:33,912 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 06:07:33,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:33,912 INFO L82 PathProgramCache]: Analyzing trace with hash 778238958, now seen corresponding path program 1 times [2020-12-22 06:07:33,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:33,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960400507] [2020-12-22 06:07:33,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:34,263 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 06:07:34,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960400507] [2020-12-22 06:07:34,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:34,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:07:34,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201146201] [2020-12-22 06:07:34,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:07:34,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:34,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:07:34,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:07:34,269 INFO L87 Difference]: Start difference. First operand 135292 states and 248668 transitions. Second operand 3 states. [2020-12-22 06:07:43,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:43,222 INFO L93 Difference]: Finished difference Result 379753 states and 697803 transitions. [2020-12-22 06:07:43,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:07:43,223 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 06:07:43,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:43,807 INFO L225 Difference]: With dead ends: 379753 [2020-12-22 06:07:43,807 INFO L226 Difference]: Without dead ends: 255949 [2020-12-22 06:07:43,947 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 06:07:44,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255949 states. [2020-12-22 06:07:54,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255949 to 255943. [2020-12-22 06:07:54,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255943 states. [2020-12-22 06:07:55,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255943 states to 255943 states and 470690 transitions. [2020-12-22 06:07:55,218 INFO L78 Accepts]: Start accepts. Automaton has 255943 states and 470690 transitions. Word has length 77 [2020-12-22 06:07:55,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:55,218 INFO L481 AbstractCegarLoop]: Abstraction has 255943 states and 470690 transitions. [2020-12-22 06:07:55,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:07:55,219 INFO L276 IsEmpty]: Start isEmpty. Operand 255943 states and 470690 transitions. [2020-12-22 06:07:55,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 06:07:55,226 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:55,227 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:07:55,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 06:07:55,227 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 06:07:55,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:55,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1644356627, now seen corresponding path program 1 times [2020-12-22 06:07:55,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:55,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818821165] [2020-12-22 06:07:55,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:55,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:55,321 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 06:07:55,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818821165] [2020-12-22 06:07:55,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:55,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:07:55,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765292038] [2020-12-22 06:07:55,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:07:55,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:55,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:07:55,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:07:55,324 INFO L87 Difference]: Start difference. First operand 255943 states and 470690 transitions. Second operand 3 states. [2020-12-22 06:08:12,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:08:12,434 INFO L93 Difference]: Finished difference Result 732613 states and 1346605 transitions. [2020-12-22 06:08:12,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:08:12,434 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 06:08:12,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:08:13,979 INFO L225 Difference]: With dead ends: 732613 [2020-12-22 06:08:13,980 INFO L226 Difference]: Without dead ends: 495309 [2020-12-22 06:08:14,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:08:14,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495309 states.