/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_spec9_product27.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 06:13:52,084 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 06:13:52,088 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 06:13:52,148 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 06:13:52,149 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 06:13:52,150 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 06:13:52,152 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 06:13:52,154 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 06:13:52,156 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 06:13:52,158 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 06:13:52,159 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 06:13:52,160 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 06:13:52,161 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 06:13:52,162 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 06:13:52,163 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 06:13:52,164 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 06:13:52,165 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 06:13:52,166 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 06:13:52,177 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 06:13:52,180 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 06:13:52,181 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 06:13:52,184 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 06:13:52,185 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 06:13:52,186 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 06:13:52,189 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 06:13:52,193 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 06:13:52,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 06:13:52,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 06:13:52,195 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 06:13:52,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 06:13:52,196 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 06:13:52,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 06:13:52,197 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 06:13:52,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 06:13:52,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 06:13:52,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 06:13:52,201 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 06:13:52,227 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 06:13:52,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 06:13:52,228 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 06:13:52,229 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 06:13:52,229 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 06:13:52,229 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 06:13:52,229 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 06:13:52,229 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 06:13:52,230 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 06:13:52,230 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 06:13:52,230 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 06:13:52,230 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 06:13:52,230 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 06:13:52,231 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 06:13:52,231 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 06:13:52,231 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 06:13:52,231 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 06:13:52,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:13:52,232 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 06:13:52,232 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 06:13:52,232 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 06:13:52,232 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 06:13:52,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 06:13:52,233 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 06:13:52,233 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 06:13:52,233 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 06:13:52,635 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 06:13:52,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 06:13:52,669 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 06:13:52,670 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 06:13:52,671 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 06:13:52,672 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c [2020-12-22 06:13:52,758 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e24b3bfff/fd55c55579c749efb329dfcd1312ed25/FLAG8fac2ae71 [2020-12-22 06:13:53,510 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 06:13:53,511 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c [2020-12-22 06:13:53,538 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e24b3bfff/fd55c55579c749efb329dfcd1312ed25/FLAG8fac2ae71 [2020-12-22 06:13:53,666 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e24b3bfff/fd55c55579c749efb329dfcd1312ed25 [2020-12-22 06:13:53,675 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 06:13:53,678 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 06:13:53,681 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 06:13:53,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 06:13:53,686 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 06:13:53,687 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:13:53" (1/1) ... [2020-12-22 06:13:53,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2071dedf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:53, skipping insertion in model container [2020-12-22 06:13:53,690 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:13:53" (1/1) ... [2020-12-22 06:13:53,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 06:13:53,796 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 06:13:54,443 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_spec9_product27.cil.c[66113,66126] [2020-12-22 06:13:54,471 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:13:54,490 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 06:13:54,740 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_spec9_product27.cil.c[66113,66126] [2020-12-22 06:13:54,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:13:54,823 INFO L208 MainTranslator]: Completed translation [2020-12-22 06:13:54,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:54 WrapperNode [2020-12-22 06:13:54,824 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 06:13:54,825 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 06:13:54,826 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 06:13:54,826 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 06:13:54,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:54" (1/1) ... [2020-12-22 06:13:54,868 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:54" (1/1) ... [2020-12-22 06:13:55,109 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 06:13:55,118 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 06:13:55,119 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 06:13:55,119 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 06:13:55,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:54" (1/1) ... [2020-12-22 06:13:55,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:54" (1/1) ... [2020-12-22 06:13:55,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:54" (1/1) ... [2020-12-22 06:13:55,172 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:54" (1/1) ... [2020-12-22 06:13:55,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:54" (1/1) ... [2020-12-22 06:13:55,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:54" (1/1) ... [2020-12-22 06:13:55,360 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:54" (1/1) ... [2020-12-22 06:13:55,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 06:13:55,402 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 06:13:55,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 06:13:55,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 06:13:55,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:54" (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 06:13:55,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 06:13:55,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 06:13:55,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 06:13:55,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 06:14:01,538 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 06:14:01,540 INFO L299 CfgBuilder]: Removed 649 assume(true) statements. [2020-12-22 06:14:01,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:14:01 BoogieIcfgContainer [2020-12-22 06:14:01,548 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 06:14:01,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 06:14:01,552 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 06:14:01,556 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 06:14:01,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:13:53" (1/3) ... [2020-12-22 06:14:01,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c495427 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:14:01, skipping insertion in model container [2020-12-22 06:14:01,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:54" (2/3) ... [2020-12-22 06:14:01,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c495427 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:14:01, skipping insertion in model container [2020-12-22 06:14:01,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:14:01" (3/3) ... [2020-12-22 06:14:01,561 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product27.cil.c [2020-12-22 06:14:01,568 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 06:14:01,574 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-22 06:14:01,593 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-22 06:14:01,653 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 06:14:01,653 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 06:14:01,654 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 06:14:01,654 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 06:14:01,655 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 06:14:01,655 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 06:14:01,659 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 06:14:01,659 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 06:14:01,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2604 states. [2020-12-22 06:14:01,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 06:14:01,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:01,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:01,778 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 06:14:01,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:01,785 INFO L82 PathProgramCache]: Analyzing trace with hash -2128793174, now seen corresponding path program 1 times [2020-12-22 06:14:01,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:01,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130087157] [2020-12-22 06:14:01,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:02,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:02,240 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 06:14:02,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130087157] [2020-12-22 06:14:02,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:02,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:14:02,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992282306] [2020-12-22 06:14:02,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:14:02,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:02,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:14:02,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:14:02,272 INFO L87 Difference]: Start difference. First operand 2604 states. Second operand 3 states. [2020-12-22 06:14:02,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:02,525 INFO L93 Difference]: Finished difference Result 5199 states and 9777 transitions. [2020-12-22 06:14:02,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:14:02,527 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 06:14:02,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:02,592 INFO L225 Difference]: With dead ends: 5199 [2020-12-22 06:14:02,592 INFO L226 Difference]: Without dead ends: 2600 [2020-12-22 06:14:02,607 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 06:14:02,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2020-12-22 06:14:02,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 2600. [2020-12-22 06:14:02,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2600 states. [2020-12-22 06:14:02,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 4879 transitions. [2020-12-22 06:14:02,830 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 4879 transitions. Word has length 43 [2020-12-22 06:14:02,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:02,830 INFO L481 AbstractCegarLoop]: Abstraction has 2600 states and 4879 transitions. [2020-12-22 06:14:02,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:14:02,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 4879 transitions. [2020-12-22 06:14:02,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 06:14:02,837 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:02,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:02,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 06:14:02,839 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 06:14:02,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:02,842 INFO L82 PathProgramCache]: Analyzing trace with hash 991261519, now seen corresponding path program 1 times [2020-12-22 06:14:02,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:02,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600529019] [2020-12-22 06:14:02,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:02,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:03,045 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 06:14:03,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600529019] [2020-12-22 06:14:03,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:03,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 06:14:03,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757019039] [2020-12-22 06:14:03,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:14:03,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:03,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:14:03,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:14:03,049 INFO L87 Difference]: Start difference. First operand 2600 states and 4879 transitions. Second operand 6 states. [2020-12-22 06:14:03,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:03,280 INFO L93 Difference]: Finished difference Result 5151 states and 9674 transitions. [2020-12-22 06:14:03,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:14:03,280 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 50 [2020-12-22 06:14:03,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:03,295 INFO L225 Difference]: With dead ends: 5151 [2020-12-22 06:14:03,296 INFO L226 Difference]: Without dead ends: 2594 [2020-12-22 06:14:03,301 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 06:14:03,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2594 states. [2020-12-22 06:14:03,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2594 to 2594. [2020-12-22 06:14:03,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2594 states. [2020-12-22 06:14:03,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 4866 transitions. [2020-12-22 06:14:03,398 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 4866 transitions. Word has length 50 [2020-12-22 06:14:03,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:03,399 INFO L481 AbstractCegarLoop]: Abstraction has 2594 states and 4866 transitions. [2020-12-22 06:14:03,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:14:03,399 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 4866 transitions. [2020-12-22 06:14:03,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 06:14:03,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:03,407 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:03,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 06:14:03,409 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 06:14:03,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:03,411 INFO L82 PathProgramCache]: Analyzing trace with hash -681367187, now seen corresponding path program 1 times [2020-12-22 06:14:03,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:03,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85351174] [2020-12-22 06:14:03,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:03,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:03,584 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 06:14:03,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85351174] [2020-12-22 06:14:03,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:03,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:14:03,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536344427] [2020-12-22 06:14:03,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:14:03,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:03,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:14:03,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:03,587 INFO L87 Difference]: Start difference. First operand 2594 states and 4866 transitions. Second operand 4 states. [2020-12-22 06:14:03,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:03,873 INFO L93 Difference]: Finished difference Result 5145 states and 9661 transitions. [2020-12-22 06:14:03,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:14:03,874 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-12-22 06:14:03,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:03,889 INFO L225 Difference]: With dead ends: 5145 [2020-12-22 06:14:03,889 INFO L226 Difference]: Without dead ends: 2594 [2020-12-22 06:14:03,896 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 06:14:03,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2594 states. [2020-12-22 06:14:03,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2594 to 2594. [2020-12-22 06:14:03,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2594 states. [2020-12-22 06:14:03,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 4862 transitions. [2020-12-22 06:14:03,997 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 4862 transitions. Word has length 51 [2020-12-22 06:14:03,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:04,006 INFO L481 AbstractCegarLoop]: Abstraction has 2594 states and 4862 transitions. [2020-12-22 06:14:04,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:14:04,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 4862 transitions. [2020-12-22 06:14:04,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 06:14:04,011 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:04,011 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:04,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 06:14:04,011 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 06:14:04,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:04,012 INFO L82 PathProgramCache]: Analyzing trace with hash 717086386, now seen corresponding path program 1 times [2020-12-22 06:14:04,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:04,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796030886] [2020-12-22 06:14:04,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:04,121 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 06:14:04,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796030886] [2020-12-22 06:14:04,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:04,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:14:04,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97538256] [2020-12-22 06:14:04,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:14:04,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:04,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:14:04,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:04,126 INFO L87 Difference]: Start difference. First operand 2594 states and 4862 transitions. Second operand 4 states. [2020-12-22 06:14:04,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:04,320 INFO L93 Difference]: Finished difference Result 5145 states and 9657 transitions. [2020-12-22 06:14:04,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:14:04,320 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-12-22 06:14:04,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:04,335 INFO L225 Difference]: With dead ends: 5145 [2020-12-22 06:14:04,336 INFO L226 Difference]: Without dead ends: 2594 [2020-12-22 06:14:04,340 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 06:14:04,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2594 states. [2020-12-22 06:14:04,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2594 to 2594. [2020-12-22 06:14:04,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2594 states. [2020-12-22 06:14:04,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 4858 transitions. [2020-12-22 06:14:04,448 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 4858 transitions. Word has length 52 [2020-12-22 06:14:04,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:04,448 INFO L481 AbstractCegarLoop]: Abstraction has 2594 states and 4858 transitions. [2020-12-22 06:14:04,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:14:04,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 4858 transitions. [2020-12-22 06:14:04,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 06:14:04,454 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:04,454 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] [2020-12-22 06:14:04,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 06:14:04,457 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 06:14:04,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:04,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1156944082, now seen corresponding path program 1 times [2020-12-22 06:14:04,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:04,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285942557] [2020-12-22 06:14:04,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:04,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:04,548 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 06:14:04,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285942557] [2020-12-22 06:14:04,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:04,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:14:04,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661362264] [2020-12-22 06:14:04,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:14:04,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:04,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:14:04,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:04,552 INFO L87 Difference]: Start difference. First operand 2594 states and 4858 transitions. Second operand 4 states. [2020-12-22 06:14:04,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:04,812 INFO L93 Difference]: Finished difference Result 5145 states and 9653 transitions. [2020-12-22 06:14:04,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:14:04,813 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-12-22 06:14:04,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:04,830 INFO L225 Difference]: With dead ends: 5145 [2020-12-22 06:14:04,830 INFO L226 Difference]: Without dead ends: 2594 [2020-12-22 06:14:04,835 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 06:14:04,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2594 states. [2020-12-22 06:14:04,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2594 to 2594. [2020-12-22 06:14:04,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2594 states. [2020-12-22 06:14:04,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 4854 transitions. [2020-12-22 06:14:04,931 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 4854 transitions. Word has length 53 [2020-12-22 06:14:04,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:04,931 INFO L481 AbstractCegarLoop]: Abstraction has 2594 states and 4854 transitions. [2020-12-22 06:14:04,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:14:04,931 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 4854 transitions. [2020-12-22 06:14:04,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 06:14:04,935 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:04,936 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] [2020-12-22 06:14:04,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 06:14:04,936 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 06:14:04,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:04,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1248226642, now seen corresponding path program 1 times [2020-12-22 06:14:04,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:04,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736056575] [2020-12-22 06:14:04,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:04,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:05,025 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 06:14:05,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736056575] [2020-12-22 06:14:05,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:05,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:14:05,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474885754] [2020-12-22 06:14:05,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:14:05,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:05,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:14:05,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:05,029 INFO L87 Difference]: Start difference. First operand 2594 states and 4854 transitions. Second operand 4 states. [2020-12-22 06:14:05,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:05,158 INFO L93 Difference]: Finished difference Result 5145 states and 9649 transitions. [2020-12-22 06:14:05,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:14:05,159 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-12-22 06:14:05,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:05,173 INFO L225 Difference]: With dead ends: 5145 [2020-12-22 06:14:05,173 INFO L226 Difference]: Without dead ends: 2573 [2020-12-22 06:14:05,178 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 06:14:05,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2573 states. [2020-12-22 06:14:05,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2573 to 2573. [2020-12-22 06:14:05,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2573 states. [2020-12-22 06:14:05,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 4820 transitions. [2020-12-22 06:14:05,279 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 4820 transitions. Word has length 53 [2020-12-22 06:14:05,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:05,279 INFO L481 AbstractCegarLoop]: Abstraction has 2573 states and 4820 transitions. [2020-12-22 06:14:05,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:14:05,279 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 4820 transitions. [2020-12-22 06:14:05,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 06:14:05,282 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:05,282 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:05,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 06:14:05,283 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 06:14:05,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:05,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1945100663, now seen corresponding path program 1 times [2020-12-22 06:14:05,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:05,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494347723] [2020-12-22 06:14:05,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:05,379 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 06:14:05,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494347723] [2020-12-22 06:14:05,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:05,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:14:05,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219759177] [2020-12-22 06:14:05,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:14:05,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:05,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:14:05,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:05,382 INFO L87 Difference]: Start difference. First operand 2573 states and 4820 transitions. Second operand 4 states. [2020-12-22 06:14:05,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:05,579 INFO L93 Difference]: Finished difference Result 5124 states and 9615 transitions. [2020-12-22 06:14:05,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:14:05,579 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-12-22 06:14:05,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:05,593 INFO L225 Difference]: With dead ends: 5124 [2020-12-22 06:14:05,593 INFO L226 Difference]: Without dead ends: 2573 [2020-12-22 06:14:05,598 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 06:14:05,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2573 states. [2020-12-22 06:14:05,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2573 to 2573. [2020-12-22 06:14:05,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2573 states. [2020-12-22 06:14:05,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 4819 transitions. [2020-12-22 06:14:05,695 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 4819 transitions. Word has length 54 [2020-12-22 06:14:05,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:05,695 INFO L481 AbstractCegarLoop]: Abstraction has 2573 states and 4819 transitions. [2020-12-22 06:14:05,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:14:05,695 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 4819 transitions. [2020-12-22 06:14:05,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 06:14:05,697 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:05,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:05,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 06:14:05,698 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 06:14:05,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:05,699 INFO L82 PathProgramCache]: Analyzing trace with hash 645620791, now seen corresponding path program 1 times [2020-12-22 06:14:05,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:05,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963919368] [2020-12-22 06:14:05,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:05,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:05,763 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 06:14:05,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963919368] [2020-12-22 06:14:05,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:05,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:14:05,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245059157] [2020-12-22 06:14:05,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:14:05,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:05,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:14:05,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:05,768 INFO L87 Difference]: Start difference. First operand 2573 states and 4819 transitions. Second operand 4 states. [2020-12-22 06:14:05,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:05,913 INFO L93 Difference]: Finished difference Result 5124 states and 9614 transitions. [2020-12-22 06:14:05,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:14:05,913 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-12-22 06:14:05,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:05,930 INFO L225 Difference]: With dead ends: 5124 [2020-12-22 06:14:05,930 INFO L226 Difference]: Without dead ends: 2573 [2020-12-22 06:14:05,935 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 06:14:05,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2573 states. [2020-12-22 06:14:06,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2573 to 2573. [2020-12-22 06:14:06,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2573 states. [2020-12-22 06:14:06,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 4818 transitions. [2020-12-22 06:14:06,043 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 4818 transitions. Word has length 55 [2020-12-22 06:14:06,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:06,045 INFO L481 AbstractCegarLoop]: Abstraction has 2573 states and 4818 transitions. [2020-12-22 06:14:06,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:14:06,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 4818 transitions. [2020-12-22 06:14:06,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 06:14:06,048 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:06,048 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:06,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 06:14:06,048 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 06:14:06,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:06,049 INFO L82 PathProgramCache]: Analyzing trace with hash -946079684, now seen corresponding path program 1 times [2020-12-22 06:14:06,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:06,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038772917] [2020-12-22 06:14:06,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:06,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:06,150 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 06:14:06,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038772917] [2020-12-22 06:14:06,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:06,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:14:06,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659274297] [2020-12-22 06:14:06,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:14:06,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:06,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:14:06,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:14:06,159 INFO L87 Difference]: Start difference. First operand 2573 states and 4818 transitions. Second operand 7 states. [2020-12-22 06:14:06,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:06,482 INFO L93 Difference]: Finished difference Result 5118 states and 9602 transitions. [2020-12-22 06:14:06,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:14:06,483 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-12-22 06:14:06,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:06,517 INFO L225 Difference]: With dead ends: 5118 [2020-12-22 06:14:06,517 INFO L226 Difference]: Without dead ends: 2573 [2020-12-22 06:14:06,523 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 06:14:06,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2573 states. [2020-12-22 06:14:06,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2573 to 2573. [2020-12-22 06:14:06,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2573 states. [2020-12-22 06:14:06,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 4817 transitions. [2020-12-22 06:14:06,643 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 4817 transitions. Word has length 56 [2020-12-22 06:14:06,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:06,643 INFO L481 AbstractCegarLoop]: Abstraction has 2573 states and 4817 transitions. [2020-12-22 06:14:06,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:14:06,644 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 4817 transitions. [2020-12-22 06:14:06,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 06:14:06,646 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:06,647 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] [2020-12-22 06:14:06,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 06:14:06,647 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 06:14:06,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:06,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1011030124, now seen corresponding path program 1 times [2020-12-22 06:14:06,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:06,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096510768] [2020-12-22 06:14:06,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:06,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:06,762 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 06:14:06,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096510768] [2020-12-22 06:14:06,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:06,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:14:06,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586628442] [2020-12-22 06:14:06,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:14:06,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:06,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:14:06,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:06,766 INFO L87 Difference]: Start difference. First operand 2573 states and 4817 transitions. Second operand 4 states. [2020-12-22 06:14:08,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:08,108 INFO L93 Difference]: Finished difference Result 7185 states and 13512 transitions. [2020-12-22 06:14:08,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:14:08,109 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-12-22 06:14:08,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:08,123 INFO L225 Difference]: With dead ends: 7185 [2020-12-22 06:14:08,123 INFO L226 Difference]: Without dead ends: 4646 [2020-12-22 06:14:08,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:08,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4646 states. [2020-12-22 06:14:08,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4646 to 2573. [2020-12-22 06:14:08,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2573 states. [2020-12-22 06:14:08,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 4811 transitions. [2020-12-22 06:14:08,314 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 4811 transitions. Word has length 57 [2020-12-22 06:14:08,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:08,314 INFO L481 AbstractCegarLoop]: Abstraction has 2573 states and 4811 transitions. [2020-12-22 06:14:08,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:14:08,315 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 4811 transitions. [2020-12-22 06:14:08,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 06:14:08,317 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:08,317 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, 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 06:14:08,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 06:14:08,317 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 06:14:08,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:08,318 INFO L82 PathProgramCache]: Analyzing trace with hash 941175528, now seen corresponding path program 1 times [2020-12-22 06:14:08,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:08,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288497146] [2020-12-22 06:14:08,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:08,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:08,396 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 06:14:08,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288497146] [2020-12-22 06:14:08,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:08,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:14:08,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410258141] [2020-12-22 06:14:08,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:14:08,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:08,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:14:08,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:08,399 INFO L87 Difference]: Start difference. First operand 2573 states and 4811 transitions. Second operand 4 states. [2020-12-22 06:14:09,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:09,508 INFO L93 Difference]: Finished difference Result 7185 states and 13501 transitions. [2020-12-22 06:14:09,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:14:09,509 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-12-22 06:14:09,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:09,524 INFO L225 Difference]: With dead ends: 7185 [2020-12-22 06:14:09,524 INFO L226 Difference]: Without dead ends: 4646 [2020-12-22 06:14:09,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:09,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4646 states. [2020-12-22 06:14:09,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4646 to 2573. [2020-12-22 06:14:09,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2573 states. [2020-12-22 06:14:09,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 4805 transitions. [2020-12-22 06:14:09,655 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 4805 transitions. Word has length 59 [2020-12-22 06:14:09,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:09,656 INFO L481 AbstractCegarLoop]: Abstraction has 2573 states and 4805 transitions. [2020-12-22 06:14:09,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:14:09,656 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 4805 transitions. [2020-12-22 06:14:09,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 06:14:09,658 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:09,658 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 06:14:09,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 06:14:09,659 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 06:14:09,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:09,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1956769418, now seen corresponding path program 1 times [2020-12-22 06:14:09,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:09,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980607109] [2020-12-22 06:14:09,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:09,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:09,747 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 06:14:09,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980607109] [2020-12-22 06:14:09,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:09,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:14:09,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664966255] [2020-12-22 06:14:09,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:14:09,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:09,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:14:09,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:09,750 INFO L87 Difference]: Start difference. First operand 2573 states and 4805 transitions. Second operand 4 states. [2020-12-22 06:14:10,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:10,842 INFO L93 Difference]: Finished difference Result 7185 states and 13490 transitions. [2020-12-22 06:14:10,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:14:10,842 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-12-22 06:14:10,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:10,855 INFO L225 Difference]: With dead ends: 7185 [2020-12-22 06:14:10,856 INFO L226 Difference]: Without dead ends: 4646 [2020-12-22 06:14:10,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:10,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4646 states. [2020-12-22 06:14:10,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4646 to 2573. [2020-12-22 06:14:10,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2573 states. [2020-12-22 06:14:10,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 4799 transitions. [2020-12-22 06:14:10,989 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 4799 transitions. Word has length 61 [2020-12-22 06:14:10,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:10,989 INFO L481 AbstractCegarLoop]: Abstraction has 2573 states and 4799 transitions. [2020-12-22 06:14:10,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:14:10,989 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 4799 transitions. [2020-12-22 06:14:10,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 06:14:10,992 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:10,992 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] [2020-12-22 06:14:10,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 06:14:10,992 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 06:14:10,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:10,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1177905544, now seen corresponding path program 1 times [2020-12-22 06:14:10,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:10,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972719237] [2020-12-22 06:14:10,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:11,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:11,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:14:11,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972719237] [2020-12-22 06:14:11,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:11,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:14:11,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47099967] [2020-12-22 06:14:11,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:14:11,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:11,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:14:11,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:11,109 INFO L87 Difference]: Start difference. First operand 2573 states and 4799 transitions. Second operand 4 states. [2020-12-22 06:14:12,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:12,230 INFO L93 Difference]: Finished difference Result 7185 states and 13479 transitions. [2020-12-22 06:14:12,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:14:12,231 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-12-22 06:14:12,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:12,245 INFO L225 Difference]: With dead ends: 7185 [2020-12-22 06:14:12,246 INFO L226 Difference]: Without dead ends: 4646 [2020-12-22 06:14:12,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:12,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4646 states. [2020-12-22 06:14:12,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4646 to 2573. [2020-12-22 06:14:12,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2573 states. [2020-12-22 06:14:12,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 4793 transitions. [2020-12-22 06:14:12,370 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 4793 transitions. Word has length 63 [2020-12-22 06:14:12,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:12,371 INFO L481 AbstractCegarLoop]: Abstraction has 2573 states and 4793 transitions. [2020-12-22 06:14:12,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:14:12,371 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 4793 transitions. [2020-12-22 06:14:12,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 06:14:12,374 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:12,374 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:12,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 06:14:12,374 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 06:14:12,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:12,375 INFO L82 PathProgramCache]: Analyzing trace with hash -907708416, now seen corresponding path program 1 times [2020-12-22 06:14:12,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:12,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938616166] [2020-12-22 06:14:12,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:12,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:12,459 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 06:14:12,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938616166] [2020-12-22 06:14:12,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:12,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:14:12,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869977423] [2020-12-22 06:14:12,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:14:12,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:12,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:14:12,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:14:12,461 INFO L87 Difference]: Start difference. First operand 2573 states and 4793 transitions. Second operand 6 states. [2020-12-22 06:14:13,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:13,223 INFO L93 Difference]: Finished difference Result 9205 states and 17208 transitions. [2020-12-22 06:14:13,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:14:13,223 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-12-22 06:14:13,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:13,243 INFO L225 Difference]: With dead ends: 9205 [2020-12-22 06:14:13,243 INFO L226 Difference]: Without dead ends: 6997 [2020-12-22 06:14:13,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:14:13,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6997 states. [2020-12-22 06:14:13,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6997 to 5694. [2020-12-22 06:14:13,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5694 states. [2020-12-22 06:14:13,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5694 states to 5694 states and 10638 transitions. [2020-12-22 06:14:13,546 INFO L78 Accepts]: Start accepts. Automaton has 5694 states and 10638 transitions. Word has length 65 [2020-12-22 06:14:13,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:13,546 INFO L481 AbstractCegarLoop]: Abstraction has 5694 states and 10638 transitions. [2020-12-22 06:14:13,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:14:13,546 INFO L276 IsEmpty]: Start isEmpty. Operand 5694 states and 10638 transitions. [2020-12-22 06:14:13,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 06:14:13,549 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:13,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:13,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 06:14:13,550 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 06:14:13,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:13,550 INFO L82 PathProgramCache]: Analyzing trace with hash 399497902, now seen corresponding path program 1 times [2020-12-22 06:14:13,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:13,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624479581] [2020-12-22 06:14:13,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:13,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:13,643 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 06:14:13,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624479581] [2020-12-22 06:14:13,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:13,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:14:13,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146641337] [2020-12-22 06:14:13,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:14:13,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:13,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:14:13,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:14:13,645 INFO L87 Difference]: Start difference. First operand 5694 states and 10638 transitions. Second operand 6 states. [2020-12-22 06:14:14,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:14,624 INFO L93 Difference]: Finished difference Result 23452 states and 43858 transitions. [2020-12-22 06:14:14,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:14:14,625 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 06:14:14,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:14,677 INFO L225 Difference]: With dead ends: 23452 [2020-12-22 06:14:14,677 INFO L226 Difference]: Without dead ends: 18124 [2020-12-22 06:14:14,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:14:14,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18124 states. [2020-12-22 06:14:15,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18124 to 14349. [2020-12-22 06:14:15,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14349 states. [2020-12-22 06:14:15,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14349 states to 14349 states and 26810 transitions. [2020-12-22 06:14:15,450 INFO L78 Accepts]: Start accepts. Automaton has 14349 states and 26810 transitions. Word has length 66 [2020-12-22 06:14:15,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:15,450 INFO L481 AbstractCegarLoop]: Abstraction has 14349 states and 26810 transitions. [2020-12-22 06:14:15,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:14:15,450 INFO L276 IsEmpty]: Start isEmpty. Operand 14349 states and 26810 transitions. [2020-12-22 06:14:15,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 06:14:15,453 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:15,453 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:15,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 06:14:15,454 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 06:14:15,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:15,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1820850373, now seen corresponding path program 1 times [2020-12-22 06:14:15,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:15,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782304310] [2020-12-22 06:14:15,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:15,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:15,572 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 06:14:15,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782304310] [2020-12-22 06:14:15,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:15,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:14:15,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166940166] [2020-12-22 06:14:15,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:14:15,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:15,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:14:15,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:14:15,574 INFO L87 Difference]: Start difference. First operand 14349 states and 26810 transitions. Second operand 6 states. [2020-12-22 06:14:17,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:17,481 INFO L93 Difference]: Finished difference Result 64047 states and 119635 transitions. [2020-12-22 06:14:17,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:14:17,482 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 06:14:17,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:17,613 INFO L225 Difference]: With dead ends: 64047 [2020-12-22 06:14:17,614 INFO L226 Difference]: Without dead ends: 50065 [2020-12-22 06:14:17,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:14:17,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50065 states. [2020-12-22 06:14:19,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50065 to 38920. [2020-12-22 06:14:19,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38920 states. [2020-12-22 06:14:19,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38920 states to 38920 states and 72631 transitions. [2020-12-22 06:14:19,270 INFO L78 Accepts]: Start accepts. Automaton has 38920 states and 72631 transitions. Word has length 67 [2020-12-22 06:14:19,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:19,270 INFO L481 AbstractCegarLoop]: Abstraction has 38920 states and 72631 transitions. [2020-12-22 06:14:19,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:14:19,270 INFO L276 IsEmpty]: Start isEmpty. Operand 38920 states and 72631 transitions. [2020-12-22 06:14:19,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 06:14:19,273 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:19,273 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:19,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 06:14:19,274 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 06:14:19,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:19,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1809201005, now seen corresponding path program 1 times [2020-12-22 06:14:19,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:19,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73330492] [2020-12-22 06:14:19,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:19,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:19,361 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 06:14:19,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73330492] [2020-12-22 06:14:19,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:19,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:14:19,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197672169] [2020-12-22 06:14:19,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:14:19,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:19,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:14:19,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:14:19,364 INFO L87 Difference]: Start difference. First operand 38920 states and 72631 transitions. Second operand 6 states. [2020-12-22 06:14:23,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:23,856 INFO L93 Difference]: Finished difference Result 181622 states and 338757 transitions. [2020-12-22 06:14:23,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:14:23,856 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-12-22 06:14:23,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:24,258 INFO L225 Difference]: With dead ends: 181622 [2020-12-22 06:14:24,258 INFO L226 Difference]: Without dead ends: 143070 [2020-12-22 06:14:24,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:14:24,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143070 states. [2020-12-22 06:14:28,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143070 to 109923. [2020-12-22 06:14:28,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109923 states. [2020-12-22 06:14:29,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109923 states to 109923 states and 204846 transitions. [2020-12-22 06:14:29,161 INFO L78 Accepts]: Start accepts. Automaton has 109923 states and 204846 transitions. Word has length 68 [2020-12-22 06:14:29,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:29,162 INFO L481 AbstractCegarLoop]: Abstraction has 109923 states and 204846 transitions. [2020-12-22 06:14:29,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:14:29,162 INFO L276 IsEmpty]: Start isEmpty. Operand 109923 states and 204846 transitions. [2020-12-22 06:14:29,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 06:14:29,173 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:29,173 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 06:14:29,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 06:14:29,173 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 06:14:29,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:29,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1175985546, now seen corresponding path program 1 times [2020-12-22 06:14:29,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:29,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282469509] [2020-12-22 06:14:29,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:29,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:29,265 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 06:14:29,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282469509] [2020-12-22 06:14:29,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:29,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:14:29,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484098655] [2020-12-22 06:14:29,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:14:29,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:29,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:14:29,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:14:29,275 INFO L87 Difference]: Start difference. First operand 109923 states and 204846 transitions. Second operand 6 states. [2020-12-22 06:14:41,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:41,990 INFO L93 Difference]: Finished difference Result 526077 states and 979971 transitions. [2020-12-22 06:14:41,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:14:41,990 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-12-22 06:14:41,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:43,309 INFO L225 Difference]: With dead ends: 526077 [2020-12-22 06:14:43,309 INFO L226 Difference]: Without dead ends: 416523 [2020-12-22 06:14:43,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:14:43,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416523 states. [2020-12-22 06:14:55,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416523 to 317646. [2020-12-22 06:14:55,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317646 states. [2020-12-22 06:14:56,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317646 states to 317646 states and 591243 transitions. [2020-12-22 06:14:56,836 INFO L78 Accepts]: Start accepts. Automaton has 317646 states and 591243 transitions. Word has length 69 [2020-12-22 06:14:56,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:56,837 INFO L481 AbstractCegarLoop]: Abstraction has 317646 states and 591243 transitions. [2020-12-22 06:14:56,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:14:56,837 INFO L276 IsEmpty]: Start isEmpty. Operand 317646 states and 591243 transitions. [2020-12-22 06:14:56,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 06:14:56,852 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:56,854 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:56,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 06:14:56,854 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 06:14:56,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:56,855 INFO L82 PathProgramCache]: Analyzing trace with hash -539791238, now seen corresponding path program 1 times [2020-12-22 06:14:56,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:56,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916006877] [2020-12-22 06:14:56,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:56,915 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 06:14:56,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916006877] [2020-12-22 06:14:56,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:56,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:14:56,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594156204] [2020-12-22 06:14:56,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:14:56,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:56,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:14:56,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:14:56,917 INFO L87 Difference]: Start difference. First operand 317646 states and 591243 transitions. Second operand 3 states. [2020-12-22 06:15:16,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:15:16,008 INFO L93 Difference]: Finished difference Result 936917 states and 1743409 transitions. [2020-12-22 06:15:16,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:15:16,009 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 06:15:16,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:15:17,990 INFO L225 Difference]: With dead ends: 936917 [2020-12-22 06:15:17,990 INFO L226 Difference]: Without dead ends: 634784 [2020-12-22 06:15:18,331 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 06:15:18,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634784 states. [2020-12-22 06:15:45,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634784 to 634784. [2020-12-22 06:15:45,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 634784 states. [2020-12-22 06:15:50,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634784 states to 634784 states and 1181235 transitions. [2020-12-22 06:15:50,031 INFO L78 Accepts]: Start accepts. Automaton has 634784 states and 1181235 transitions. Word has length 70 [2020-12-22 06:15:50,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:15:50,032 INFO L481 AbstractCegarLoop]: Abstraction has 634784 states and 1181235 transitions. [2020-12-22 06:15:50,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:15:50,032 INFO L276 IsEmpty]: Start isEmpty. Operand 634784 states and 1181235 transitions. [2020-12-22 06:15:50,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 06:15:50,055 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:15:50,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:15:50,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 06:15:50,056 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 06:15:50,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:15:50,056 INFO L82 PathProgramCache]: Analyzing trace with hash 446359182, now seen corresponding path program 1 times [2020-12-22 06:15:50,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:15:50,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958188091] [2020-12-22 06:15:50,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:15:50,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:15:50,209 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 06:15:50,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958188091] [2020-12-22 06:15:50,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:15:50,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:15:50,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218954118] [2020-12-22 06:15:50,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:15:50,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:15:50,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:15:50,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:15:50,211 INFO L87 Difference]: Start difference. First operand 634784 states and 1181235 transitions. Second operand 3 states.