/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/combinations/pals_lcr.5.1.ufo.BOUNDED-10.pals+Problem12_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:51:54,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:51:54,442 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:51:54,483 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:51:54,484 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:51:54,486 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:51:54,487 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:51:54,490 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:51:54,493 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:51:54,494 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:51:54,495 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:51:54,497 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:51:54,497 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:51:54,499 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:51:54,500 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:51:54,502 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:51:54,503 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:51:54,504 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:51:54,522 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:51:54,524 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:51:54,526 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:51:54,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:51:54,534 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:51:54,534 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:51:54,537 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:51:54,544 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:51:54,545 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:51:54,547 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:51:54,548 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:51:54,550 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:51:54,550 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:51:54,551 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:51:54,551 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:51:54,552 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:51:54,553 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:51:54,553 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:51:54,554 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:51:54,606 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:51:54,607 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:51:54,611 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:51:54,611 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:51:54,611 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:51:54,612 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:51:54,612 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:51:54,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:51:54,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:51:54,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:51:54,613 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:51:54,614 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:51:54,614 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:51:54,614 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:51:54,614 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:51:54,614 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:51:54,615 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:51:54,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:51:54,615 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:51:54,615 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:51:54,615 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:51:54,616 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:51:54,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:51:54,616 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:51:54,616 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:51:54,616 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:51:55,046 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:51:55,076 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:51:55,079 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:51:55,080 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:51:55,081 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:51:55,082 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.BOUNDED-10.pals+Problem12_label02.c [2020-12-22 09:51:55,181 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/406a9a84a/1ef4b99d701f45cca77745e3ea0b9cd5/FLAGa67d4c13a [2020-12-22 09:51:56,218 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:51:56,219 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.BOUNDED-10.pals+Problem12_label02.c [2020-12-22 09:51:56,265 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/406a9a84a/1ef4b99d701f45cca77745e3ea0b9cd5/FLAGa67d4c13a [2020-12-22 09:51:56,701 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/406a9a84a/1ef4b99d701f45cca77745e3ea0b9cd5 [2020-12-22 09:51:56,705 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:51:56,707 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:51:56,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:51:56,710 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:51:56,714 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:51:56,715 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:51:56" (1/1) ... [2020-12-22 09:51:56,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ffba29a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:51:56, skipping insertion in model container [2020-12-22 09:51:56,717 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:51:56" (1/1) ... [2020-12-22 09:51:56,726 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:51:56,880 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:51:57,260 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/combinations/pals_lcr.5.1.ufo.BOUNDED-10.pals+Problem12_label02.c[11767,11780] [2020-12-22 09:51:57,340 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/combinations/pals_lcr.5.1.ufo.BOUNDED-10.pals+Problem12_label02.c[18814,18827] [2020-12-22 09:51:58,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:51:58,316 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:51:58,381 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/combinations/pals_lcr.5.1.ufo.BOUNDED-10.pals+Problem12_label02.c[11767,11780] [2020-12-22 09:51:58,404 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/combinations/pals_lcr.5.1.ufo.BOUNDED-10.pals+Problem12_label02.c[18814,18827] [2020-12-22 09:51:59,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:51:59,113 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:51:59,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:51:59 WrapperNode [2020-12-22 09:51:59,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:51:59,117 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:51:59,117 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:51:59,117 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:51:59,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:51:59" (1/1) ... [2020-12-22 09:51:59,197 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:51:59" (1/1) ... [2020-12-22 09:51:59,641 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:51:59,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:51:59,643 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:51:59,643 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:51:59,653 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:51:59" (1/1) ... [2020-12-22 09:51:59,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:51:59" (1/1) ... [2020-12-22 09:51:59,807 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:51:59" (1/1) ... [2020-12-22 09:51:59,810 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:51:59" (1/1) ... [2020-12-22 09:51:59,998 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:51:59" (1/1) ... [2020-12-22 09:52:00,066 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:51:59" (1/1) ... [2020-12-22 09:52:00,158 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:51:59" (1/1) ... [2020-12-22 09:52:00,231 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:52:00,234 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:52:00,234 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:52:00,234 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:52:00,236 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:51:59" (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 09:52:00,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:52:00,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:52:00,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:52:00,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:52:06,135 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:52:06,136 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2020-12-22 09:52:06,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:52:06 BoogieIcfgContainer [2020-12-22 09:52:06,139 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:52:06,141 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:52:06,141 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:52:06,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:52:06,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:51:56" (1/3) ... [2020-12-22 09:52:06,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1812d3c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:52:06, skipping insertion in model container [2020-12-22 09:52:06,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:51:59" (2/3) ... [2020-12-22 09:52:06,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1812d3c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:52:06, skipping insertion in model container [2020-12-22 09:52:06,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:52:06" (3/3) ... [2020-12-22 09:52:06,149 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.BOUNDED-10.pals+Problem12_label02.c [2020-12-22 09:52:06,159 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:52:06,166 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:52:06,185 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:52:06,221 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:52:06,221 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:52:06,222 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:52:06,222 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:52:06,222 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:52:06,222 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:52:06,222 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:52:06,222 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:52:06,258 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states. [2020-12-22 09:52:06,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:52:06,268 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:06,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:06,270 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:06,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:06,277 INFO L82 PathProgramCache]: Analyzing trace with hash -441366565, now seen corresponding path program 1 times [2020-12-22 09:52:06,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:06,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157958987] [2020-12-22 09:52:06,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:06,539 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 09:52:06,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157958987] [2020-12-22 09:52:06,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:06,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:52:06,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124308467] [2020-12-22 09:52:06,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:52:06,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:06,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:52:06,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:52:06,569 INFO L87 Difference]: Start difference. First operand 909 states. Second operand 2 states. [2020-12-22 09:52:06,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:06,671 INFO L93 Difference]: Finished difference Result 1781 states and 3374 transitions. [2020-12-22 09:52:06,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:52:06,673 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 34 [2020-12-22 09:52:06,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:06,719 INFO L225 Difference]: With dead ends: 1781 [2020-12-22 09:52:06,720 INFO L226 Difference]: Without dead ends: 843 [2020-12-22 09:52:06,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:52:06,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2020-12-22 09:52:06,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 843. [2020-12-22 09:52:06,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 843 states. [2020-12-22 09:52:06,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1589 transitions. [2020-12-22 09:52:06,850 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1589 transitions. Word has length 34 [2020-12-22 09:52:06,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:06,851 INFO L481 AbstractCegarLoop]: Abstraction has 843 states and 1589 transitions. [2020-12-22 09:52:06,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:52:06,851 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1589 transitions. [2020-12-22 09:52:06,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:52:06,853 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:06,854 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] [2020-12-22 09:52:06,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:52:06,854 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:06,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:06,855 INFO L82 PathProgramCache]: Analyzing trace with hash -950839655, now seen corresponding path program 1 times [2020-12-22 09:52:06,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:06,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369732731] [2020-12-22 09:52:06,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:06,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:07,070 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 09:52:07,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369732731] [2020-12-22 09:52:07,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:07,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:52:07,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156314400] [2020-12-22 09:52:07,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:52:07,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:07,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:52:07,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:52:07,077 INFO L87 Difference]: Start difference. First operand 843 states and 1589 transitions. Second operand 5 states. [2020-12-22 09:52:07,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:07,235 INFO L93 Difference]: Finished difference Result 899 states and 1675 transitions. [2020-12-22 09:52:07,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:52:07,236 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-22 09:52:07,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:07,242 INFO L225 Difference]: With dead ends: 899 [2020-12-22 09:52:07,242 INFO L226 Difference]: Without dead ends: 843 [2020-12-22 09:52:07,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:52:07,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2020-12-22 09:52:07,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 843. [2020-12-22 09:52:07,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 843 states. [2020-12-22 09:52:07,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1558 transitions. [2020-12-22 09:52:07,275 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1558 transitions. Word has length 34 [2020-12-22 09:52:07,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:07,276 INFO L481 AbstractCegarLoop]: Abstraction has 843 states and 1558 transitions. [2020-12-22 09:52:07,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:52:07,277 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1558 transitions. [2020-12-22 09:52:07,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:52:07,287 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:07,288 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 09:52:07,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:52:07,289 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:07,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:07,292 INFO L82 PathProgramCache]: Analyzing trace with hash 383168621, now seen corresponding path program 1 times [2020-12-22 09:52:07,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:07,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232867765] [2020-12-22 09:52:07,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:07,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:07,544 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 09:52:07,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232867765] [2020-12-22 09:52:07,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:07,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:07,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176104590] [2020-12-22 09:52:07,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:52:07,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:07,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:52:07,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:52:07,556 INFO L87 Difference]: Start difference. First operand 843 states and 1558 transitions. Second operand 4 states. [2020-12-22 09:52:18,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:18,596 INFO L93 Difference]: Finished difference Result 3098 states and 5867 transitions. [2020-12-22 09:52:18,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:52:18,597 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-12-22 09:52:18,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:18,611 INFO L225 Difference]: With dead ends: 3098 [2020-12-22 09:52:18,611 INFO L226 Difference]: Without dead ends: 2345 [2020-12-22 09:52:18,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:52:18,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2020-12-22 09:52:18,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 2345. [2020-12-22 09:52:18,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2345 states. [2020-12-22 09:52:18,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2345 states to 2345 states and 3534 transitions. [2020-12-22 09:52:18,674 INFO L78 Accepts]: Start accepts. Automaton has 2345 states and 3534 transitions. Word has length 63 [2020-12-22 09:52:18,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:18,674 INFO L481 AbstractCegarLoop]: Abstraction has 2345 states and 3534 transitions. [2020-12-22 09:52:18,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:52:18,675 INFO L276 IsEmpty]: Start isEmpty. Operand 2345 states and 3534 transitions. [2020-12-22 09:52:18,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:52:18,676 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:18,676 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:18,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:52:18,677 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:18,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:18,677 INFO L82 PathProgramCache]: Analyzing trace with hash -695028240, now seen corresponding path program 1 times [2020-12-22 09:52:18,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:18,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036753089] [2020-12-22 09:52:18,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:18,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:18,760 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 09:52:18,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036753089] [2020-12-22 09:52:18,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:18,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:18,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153000398] [2020-12-22 09:52:18,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:18,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:18,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:18,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:18,762 INFO L87 Difference]: Start difference. First operand 2345 states and 3534 transitions. Second operand 3 states. [2020-12-22 09:52:18,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:18,816 INFO L93 Difference]: Finished difference Result 2443 states and 3688 transitions. [2020-12-22 09:52:18,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:18,817 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:52:18,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:18,832 INFO L225 Difference]: With dead ends: 2443 [2020-12-22 09:52:18,832 INFO L226 Difference]: Without dead ends: 2391 [2020-12-22 09:52:18,834 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 09:52:18,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2020-12-22 09:52:18,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 2389. [2020-12-22 09:52:18,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2389 states. [2020-12-22 09:52:18,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2389 states to 2389 states and 3604 transitions. [2020-12-22 09:52:18,898 INFO L78 Accepts]: Start accepts. Automaton has 2389 states and 3604 transitions. Word has length 64 [2020-12-22 09:52:18,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:18,900 INFO L481 AbstractCegarLoop]: Abstraction has 2389 states and 3604 transitions. [2020-12-22 09:52:18,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:18,901 INFO L276 IsEmpty]: Start isEmpty. Operand 2389 states and 3604 transitions. [2020-12-22 09:52:18,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:52:18,903 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:18,903 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:18,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:52:18,904 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:18,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:18,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1440610970, now seen corresponding path program 1 times [2020-12-22 09:52:18,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:18,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573695987] [2020-12-22 09:52:18,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:19,044 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 09:52:19,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573695987] [2020-12-22 09:52:19,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:19,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:19,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978381528] [2020-12-22 09:52:19,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:19,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:19,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:19,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:19,049 INFO L87 Difference]: Start difference. First operand 2389 states and 3604 transitions. Second operand 3 states. [2020-12-22 09:52:19,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:19,101 INFO L93 Difference]: Finished difference Result 2569 states and 3888 transitions. [2020-12-22 09:52:19,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:19,102 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:52:19,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:19,116 INFO L225 Difference]: With dead ends: 2569 [2020-12-22 09:52:19,116 INFO L226 Difference]: Without dead ends: 2473 [2020-12-22 09:52:19,118 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 09:52:19,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2020-12-22 09:52:19,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 2471. [2020-12-22 09:52:19,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2471 states. [2020-12-22 09:52:19,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 3733 transitions. [2020-12-22 09:52:19,179 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 3733 transitions. Word has length 64 [2020-12-22 09:52:19,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:19,180 INFO L481 AbstractCegarLoop]: Abstraction has 2471 states and 3733 transitions. [2020-12-22 09:52:19,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:19,180 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 3733 transitions. [2020-12-22 09:52:19,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:52:19,181 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:19,181 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:19,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:52:19,182 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:19,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:19,182 INFO L82 PathProgramCache]: Analyzing trace with hash 914325468, now seen corresponding path program 1 times [2020-12-22 09:52:19,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:19,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996064748] [2020-12-22 09:52:19,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:19,272 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 09:52:19,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996064748] [2020-12-22 09:52:19,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:19,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:19,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105062950] [2020-12-22 09:52:19,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:19,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:19,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:19,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:19,275 INFO L87 Difference]: Start difference. First operand 2471 states and 3733 transitions. Second operand 3 states. [2020-12-22 09:52:19,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:19,340 INFO L93 Difference]: Finished difference Result 2803 states and 4255 transitions. [2020-12-22 09:52:19,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:19,341 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:52:19,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:19,357 INFO L225 Difference]: With dead ends: 2803 [2020-12-22 09:52:19,357 INFO L226 Difference]: Without dead ends: 2625 [2020-12-22 09:52:19,359 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 09:52:19,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2020-12-22 09:52:19,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 2623. [2020-12-22 09:52:19,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2623 states. [2020-12-22 09:52:19,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2623 states to 2623 states and 3969 transitions. [2020-12-22 09:52:19,448 INFO L78 Accepts]: Start accepts. Automaton has 2623 states and 3969 transitions. Word has length 64 [2020-12-22 09:52:19,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:19,448 INFO L481 AbstractCegarLoop]: Abstraction has 2623 states and 3969 transitions. [2020-12-22 09:52:19,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:19,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2623 states and 3969 transitions. [2020-12-22 09:52:19,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:52:19,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:19,450 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:19,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:52:19,451 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:19,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:19,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1701027568, now seen corresponding path program 1 times [2020-12-22 09:52:19,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:19,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347733078] [2020-12-22 09:52:19,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:19,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:19,605 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 09:52:19,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347733078] [2020-12-22 09:52:19,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:19,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:19,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901452210] [2020-12-22 09:52:19,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:19,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:19,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:19,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:19,608 INFO L87 Difference]: Start difference. First operand 2623 states and 3969 transitions. Second operand 3 states. [2020-12-22 09:52:19,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:19,671 INFO L93 Difference]: Finished difference Result 3235 states and 4923 transitions. [2020-12-22 09:52:19,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:19,672 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:52:19,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:19,685 INFO L225 Difference]: With dead ends: 3235 [2020-12-22 09:52:19,686 INFO L226 Difference]: Without dead ends: 2905 [2020-12-22 09:52:19,687 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 09:52:19,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2905 states. [2020-12-22 09:52:19,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2905 to 2903. [2020-12-22 09:52:19,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2903 states. [2020-12-22 09:52:19,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 4397 transitions. [2020-12-22 09:52:19,771 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 4397 transitions. Word has length 64 [2020-12-22 09:52:19,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:19,772 INFO L481 AbstractCegarLoop]: Abstraction has 2903 states and 4397 transitions. [2020-12-22 09:52:19,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:19,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 4397 transitions. [2020-12-22 09:52:19,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:52:19,773 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:19,773 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:19,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:52:19,773 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:19,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:19,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1105068988, now seen corresponding path program 1 times [2020-12-22 09:52:19,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:19,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706228927] [2020-12-22 09:52:19,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:19,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:19,855 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 09:52:19,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706228927] [2020-12-22 09:52:19,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:19,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:19,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248618610] [2020-12-22 09:52:19,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:19,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:19,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:19,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:19,858 INFO L87 Difference]: Start difference. First operand 2903 states and 4397 transitions. Second operand 3 states. [2020-12-22 09:52:19,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:19,947 INFO L93 Difference]: Finished difference Result 4027 states and 6127 transitions. [2020-12-22 09:52:19,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:19,948 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:52:19,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:19,966 INFO L225 Difference]: With dead ends: 4027 [2020-12-22 09:52:19,967 INFO L226 Difference]: Without dead ends: 3417 [2020-12-22 09:52:19,969 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 09:52:19,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3417 states. [2020-12-22 09:52:20,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3417 to 3415. [2020-12-22 09:52:20,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3415 states. [2020-12-22 09:52:20,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3415 states to 3415 states and 5165 transitions. [2020-12-22 09:52:20,078 INFO L78 Accepts]: Start accepts. Automaton has 3415 states and 5165 transitions. Word has length 64 [2020-12-22 09:52:20,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:20,079 INFO L481 AbstractCegarLoop]: Abstraction has 3415 states and 5165 transitions. [2020-12-22 09:52:20,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:20,079 INFO L276 IsEmpty]: Start isEmpty. Operand 3415 states and 5165 transitions. [2020-12-22 09:52:20,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:52:20,080 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:20,080 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:52:20,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:52:20,080 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:20,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:20,081 INFO L82 PathProgramCache]: Analyzing trace with hash 112916410, now seen corresponding path program 1 times [2020-12-22 09:52:20,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:20,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945660280] [2020-12-22 09:52:20,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:20,196 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 09:52:20,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945660280] [2020-12-22 09:52:20,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:20,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:52:20,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250780926] [2020-12-22 09:52:20,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:52:20,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:20,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:52:20,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:52:20,198 INFO L87 Difference]: Start difference. First operand 3415 states and 5165 transitions. Second operand 7 states. [2020-12-22 09:52:20,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:20,966 INFO L93 Difference]: Finished difference Result 14635 states and 22295 transitions. [2020-12-22 09:52:20,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 09:52:20,967 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-22 09:52:20,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:21,042 INFO L225 Difference]: With dead ends: 14635 [2020-12-22 09:52:21,042 INFO L226 Difference]: Without dead ends: 13513 [2020-12-22 09:52:21,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 09:52:21,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13513 states. [2020-12-22 09:52:21,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13513 to 4535. [2020-12-22 09:52:21,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4535 states. [2020-12-22 09:52:21,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4535 states to 4535 states and 6813 transitions. [2020-12-22 09:52:21,387 INFO L78 Accepts]: Start accepts. Automaton has 4535 states and 6813 transitions. Word has length 64 [2020-12-22 09:52:21,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:21,388 INFO L481 AbstractCegarLoop]: Abstraction has 4535 states and 6813 transitions. [2020-12-22 09:52:21,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:52:21,388 INFO L276 IsEmpty]: Start isEmpty. Operand 4535 states and 6813 transitions. [2020-12-22 09:52:21,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:52:21,396 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:21,397 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 09:52:21,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:52:21,397 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:21,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:21,398 INFO L82 PathProgramCache]: Analyzing trace with hash -277208054, now seen corresponding path program 1 times [2020-12-22 09:52:21,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:21,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162979472] [2020-12-22 09:52:21,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:21,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:21,479 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 09:52:21,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162979472] [2020-12-22 09:52:21,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:21,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:21,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650325447] [2020-12-22 09:52:21,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:21,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:21,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:21,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:21,486 INFO L87 Difference]: Start difference. First operand 4535 states and 6813 transitions. Second operand 3 states. [2020-12-22 09:52:21,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:21,766 INFO L93 Difference]: Finished difference Result 7821 states and 11729 transitions. [2020-12-22 09:52:21,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:21,767 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:52:21,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:21,780 INFO L225 Difference]: With dead ends: 7821 [2020-12-22 09:52:21,781 INFO L226 Difference]: Without dead ends: 5579 [2020-12-22 09:52:21,786 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 09:52:21,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5579 states. [2020-12-22 09:52:22,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5579 to 5577. [2020-12-22 09:52:22,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5577 states. [2020-12-22 09:52:22,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5577 states to 5577 states and 8319 transitions. [2020-12-22 09:52:22,140 INFO L78 Accepts]: Start accepts. Automaton has 5577 states and 8319 transitions. Word has length 66 [2020-12-22 09:52:22,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:22,140 INFO L481 AbstractCegarLoop]: Abstraction has 5577 states and 8319 transitions. [2020-12-22 09:52:22,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:22,141 INFO L276 IsEmpty]: Start isEmpty. Operand 5577 states and 8319 transitions. [2020-12-22 09:52:22,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:52:22,141 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:22,144 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 09:52:22,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:52:22,144 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:22,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:22,145 INFO L82 PathProgramCache]: Analyzing trace with hash -210714542, now seen corresponding path program 1 times [2020-12-22 09:52:22,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:22,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38270296] [2020-12-22 09:52:22,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:22,378 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 09:52:22,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38270296] [2020-12-22 09:52:22,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:22,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:52:22,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651958326] [2020-12-22 09:52:22,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:52:22,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:22,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:52:22,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:52:22,383 INFO L87 Difference]: Start difference. First operand 5577 states and 8319 transitions. Second operand 7 states. [2020-12-22 09:52:22,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:22,912 INFO L93 Difference]: Finished difference Result 8861 states and 13185 transitions. [2020-12-22 09:52:22,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:52:22,913 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 09:52:22,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:22,926 INFO L225 Difference]: With dead ends: 8861 [2020-12-22 09:52:22,926 INFO L226 Difference]: Without dead ends: 5579 [2020-12-22 09:52:22,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:52:22,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5579 states. [2020-12-22 09:52:23,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5579 to 5577. [2020-12-22 09:52:23,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5577 states. [2020-12-22 09:52:23,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5577 states to 5577 states and 8271 transitions. [2020-12-22 09:52:23,278 INFO L78 Accepts]: Start accepts. Automaton has 5577 states and 8271 transitions. Word has length 66 [2020-12-22 09:52:23,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:23,278 INFO L481 AbstractCegarLoop]: Abstraction has 5577 states and 8271 transitions. [2020-12-22 09:52:23,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:52:23,279 INFO L276 IsEmpty]: Start isEmpty. Operand 5577 states and 8271 transitions. [2020-12-22 09:52:23,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:52:23,279 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:23,280 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 09:52:23,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:52:23,280 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:23,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:23,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1643060746, now seen corresponding path program 1 times [2020-12-22 09:52:23,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:23,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97208555] [2020-12-22 09:52:23,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:23,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:23,393 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 09:52:23,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97208555] [2020-12-22 09:52:23,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:23,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:52:23,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023186166] [2020-12-22 09:52:23,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:52:23,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:23,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:52:23,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:52:23,396 INFO L87 Difference]: Start difference. First operand 5577 states and 8271 transitions. Second operand 6 states. [2020-12-22 09:52:23,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:23,837 INFO L93 Difference]: Finished difference Result 8859 states and 13088 transitions. [2020-12-22 09:52:23,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:52:23,837 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:52:23,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:23,850 INFO L225 Difference]: With dead ends: 8859 [2020-12-22 09:52:23,850 INFO L226 Difference]: Without dead ends: 5577 [2020-12-22 09:52:23,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:52:23,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5577 states. [2020-12-22 09:52:24,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5577 to 5577. [2020-12-22 09:52:24,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5577 states. [2020-12-22 09:52:24,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5577 states to 5577 states and 8223 transitions. [2020-12-22 09:52:24,172 INFO L78 Accepts]: Start accepts. Automaton has 5577 states and 8223 transitions. Word has length 67 [2020-12-22 09:52:24,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:24,172 INFO L481 AbstractCegarLoop]: Abstraction has 5577 states and 8223 transitions. [2020-12-22 09:52:24,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:52:24,172 INFO L276 IsEmpty]: Start isEmpty. Operand 5577 states and 8223 transitions. [2020-12-22 09:52:24,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:52:24,173 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:24,174 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 09:52:24,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:52:24,174 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:24,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:24,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1372042872, now seen corresponding path program 1 times [2020-12-22 09:52:24,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:24,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362572030] [2020-12-22 09:52:24,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:24,256 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 09:52:24,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362572030] [2020-12-22 09:52:24,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:24,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:52:24,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752953193] [2020-12-22 09:52:24,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:52:24,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:24,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:52:24,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:52:24,259 INFO L87 Difference]: Start difference. First operand 5577 states and 8223 transitions. Second operand 6 states. [2020-12-22 09:52:24,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:24,634 INFO L93 Difference]: Finished difference Result 8859 states and 12992 transitions. [2020-12-22 09:52:24,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:52:24,635 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:52:24,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:24,647 INFO L225 Difference]: With dead ends: 8859 [2020-12-22 09:52:24,647 INFO L226 Difference]: Without dead ends: 5577 [2020-12-22 09:52:24,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:52:24,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5577 states. [2020-12-22 09:52:24,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5577 to 5577. [2020-12-22 09:52:24,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5577 states. [2020-12-22 09:52:24,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5577 states to 5577 states and 8175 transitions. [2020-12-22 09:52:24,930 INFO L78 Accepts]: Start accepts. Automaton has 5577 states and 8175 transitions. Word has length 67 [2020-12-22 09:52:24,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:24,930 INFO L481 AbstractCegarLoop]: Abstraction has 5577 states and 8175 transitions. [2020-12-22 09:52:24,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:52:24,931 INFO L276 IsEmpty]: Start isEmpty. Operand 5577 states and 8175 transitions. [2020-12-22 09:52:24,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:52:24,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:24,931 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 09:52:24,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:52:24,932 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:24,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:24,932 INFO L82 PathProgramCache]: Analyzing trace with hash 316900870, now seen corresponding path program 1 times [2020-12-22 09:52:24,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:24,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897751921] [2020-12-22 09:52:24,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:25,012 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 09:52:25,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897751921] [2020-12-22 09:52:25,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:25,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:52:25,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505784307] [2020-12-22 09:52:25,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:52:25,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:25,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:52:25,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:52:25,014 INFO L87 Difference]: Start difference. First operand 5577 states and 8175 transitions. Second operand 5 states. [2020-12-22 09:52:25,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:25,662 INFO L93 Difference]: Finished difference Result 8420 states and 12149 transitions. [2020-12-22 09:52:25,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:52:25,663 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 09:52:25,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:25,682 INFO L225 Difference]: With dead ends: 8420 [2020-12-22 09:52:25,682 INFO L226 Difference]: Without dead ends: 8418 [2020-12-22 09:52:25,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:52:25,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8418 states. [2020-12-22 09:52:26,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8418 to 5769. [2020-12-22 09:52:26,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5769 states. [2020-12-22 09:52:26,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5769 states to 5769 states and 8351 transitions. [2020-12-22 09:52:26,052 INFO L78 Accepts]: Start accepts. Automaton has 5769 states and 8351 transitions. Word has length 67 [2020-12-22 09:52:26,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:26,053 INFO L481 AbstractCegarLoop]: Abstraction has 5769 states and 8351 transitions. [2020-12-22 09:52:26,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:52:26,053 INFO L276 IsEmpty]: Start isEmpty. Operand 5769 states and 8351 transitions. [2020-12-22 09:52:26,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:52:26,057 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:26,057 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:26,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:52:26,057 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:26,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:26,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1065285143, now seen corresponding path program 1 times [2020-12-22 09:52:26,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:26,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354863255] [2020-12-22 09:52:26,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:26,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:26,184 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:52:26,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354863255] [2020-12-22 09:52:26,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:26,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:52:26,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970407260] [2020-12-22 09:52:26,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:52:26,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:26,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:52:26,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:52:26,187 INFO L87 Difference]: Start difference. First operand 5769 states and 8351 transitions. Second operand 7 states. [2020-12-22 09:52:27,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:27,862 INFO L93 Difference]: Finished difference Result 23845 states and 33781 transitions. [2020-12-22 09:52:27,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:52:27,863 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:52:27,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:27,903 INFO L225 Difference]: With dead ends: 23845 [2020-12-22 09:52:27,904 INFO L226 Difference]: Without dead ends: 20371 [2020-12-22 09:52:27,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:52:27,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20371 states. [2020-12-22 09:52:28,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20371 to 9241. [2020-12-22 09:52:28,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9241 states. [2020-12-22 09:52:28,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9241 states to 9241 states and 13199 transitions. [2020-12-22 09:52:28,642 INFO L78 Accepts]: Start accepts. Automaton has 9241 states and 13199 transitions. Word has length 95 [2020-12-22 09:52:28,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:28,643 INFO L481 AbstractCegarLoop]: Abstraction has 9241 states and 13199 transitions. [2020-12-22 09:52:28,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:52:28,643 INFO L276 IsEmpty]: Start isEmpty. Operand 9241 states and 13199 transitions. [2020-12-22 09:52:28,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:52:28,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:28,648 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:28,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:52:28,649 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:28,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:28,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1460899337, now seen corresponding path program 1 times [2020-12-22 09:52:28,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:28,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632994370] [2020-12-22 09:52:28,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:28,789 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:52:28,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632994370] [2020-12-22 09:52:28,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:28,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:52:28,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492318604] [2020-12-22 09:52:28,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:52:28,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:28,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:52:28,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:52:28,792 INFO L87 Difference]: Start difference. First operand 9241 states and 13199 transitions. Second operand 7 states. [2020-12-22 09:52:30,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:30,224 INFO L93 Difference]: Finished difference Result 27317 states and 38629 transitions. [2020-12-22 09:52:30,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:52:30,225 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:52:30,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:30,274 INFO L225 Difference]: With dead ends: 27317 [2020-12-22 09:52:30,274 INFO L226 Difference]: Without dead ends: 23843 [2020-12-22 09:52:30,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:52:30,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23843 states. [2020-12-22 09:52:31,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23843 to 14457. [2020-12-22 09:52:31,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14457 states. [2020-12-22 09:52:31,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14457 states to 14457 states and 20431 transitions. [2020-12-22 09:52:31,395 INFO L78 Accepts]: Start accepts. Automaton has 14457 states and 20431 transitions. Word has length 95 [2020-12-22 09:52:31,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:31,396 INFO L481 AbstractCegarLoop]: Abstraction has 14457 states and 20431 transitions. [2020-12-22 09:52:31,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:52:31,396 INFO L276 IsEmpty]: Start isEmpty. Operand 14457 states and 20431 transitions. [2020-12-22 09:52:31,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:52:31,402 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:31,402 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:31,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:52:31,402 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:31,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:31,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1702428119, now seen corresponding path program 1 times [2020-12-22 09:52:31,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:31,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154122897] [2020-12-22 09:52:31,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:31,533 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:52:31,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154122897] [2020-12-22 09:52:31,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:31,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:52:31,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530603767] [2020-12-22 09:52:31,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:52:31,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:31,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:52:31,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:52:31,536 INFO L87 Difference]: Start difference. First operand 14457 states and 20431 transitions. Second operand 7 states. [2020-12-22 09:52:33,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:33,134 INFO L93 Difference]: Finished difference Result 30789 states and 43477 transitions. [2020-12-22 09:52:33,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:52:33,134 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:52:33,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:33,177 INFO L225 Difference]: With dead ends: 30789 [2020-12-22 09:52:33,178 INFO L226 Difference]: Without dead ends: 27315 [2020-12-22 09:52:33,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:52:33,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27315 states. [2020-12-22 09:52:34,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27315 to 17929. [2020-12-22 09:52:34,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17929 states. [2020-12-22 09:52:34,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17929 states to 17929 states and 25279 transitions. [2020-12-22 09:52:34,358 INFO L78 Accepts]: Start accepts. Automaton has 17929 states and 25279 transitions. Word has length 95 [2020-12-22 09:52:34,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:34,359 INFO L481 AbstractCegarLoop]: Abstraction has 17929 states and 25279 transitions. [2020-12-22 09:52:34,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:52:34,359 INFO L276 IsEmpty]: Start isEmpty. Operand 17929 states and 25279 transitions. [2020-12-22 09:52:34,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:52:34,365 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:34,366 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:34,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:52:34,366 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:34,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:34,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1357080137, now seen corresponding path program 1 times [2020-12-22 09:52:34,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:34,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887226651] [2020-12-22 09:52:34,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:34,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:34,476 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:52:34,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887226651] [2020-12-22 09:52:34,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:34,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:52:34,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468130553] [2020-12-22 09:52:34,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:52:34,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:34,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:52:34,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:52:34,478 INFO L87 Difference]: Start difference. First operand 17929 states and 25279 transitions. Second operand 7 states. [2020-12-22 09:52:36,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:36,255 INFO L93 Difference]: Finished difference Result 34261 states and 48325 transitions. [2020-12-22 09:52:36,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:52:36,256 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:52:36,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:36,309 INFO L225 Difference]: With dead ends: 34261 [2020-12-22 09:52:36,310 INFO L226 Difference]: Without dead ends: 30787 [2020-12-22 09:52:36,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:52:36,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30787 states. [2020-12-22 09:52:37,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30787 to 21401. [2020-12-22 09:52:37,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21401 states. [2020-12-22 09:52:37,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21401 states to 21401 states and 30127 transitions. [2020-12-22 09:52:37,837 INFO L78 Accepts]: Start accepts. Automaton has 21401 states and 30127 transitions. Word has length 95 [2020-12-22 09:52:37,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:37,837 INFO L481 AbstractCegarLoop]: Abstraction has 21401 states and 30127 transitions. [2020-12-22 09:52:37,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:52:37,838 INFO L276 IsEmpty]: Start isEmpty. Operand 21401 states and 30127 transitions. [2020-12-22 09:52:37,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:52:37,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:37,843 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:37,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:52:37,843 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:37,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:37,844 INFO L82 PathProgramCache]: Analyzing trace with hash -63915415, now seen corresponding path program 1 times [2020-12-22 09:52:37,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:37,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75388897] [2020-12-22 09:52:37,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:37,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:37,956 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:52:37,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75388897] [2020-12-22 09:52:37,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:37,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:52:37,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018910767] [2020-12-22 09:52:37,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:52:37,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:37,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:52:37,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:52:37,958 INFO L87 Difference]: Start difference. First operand 21401 states and 30127 transitions. Second operand 7 states. [2020-12-22 09:52:40,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:40,115 INFO L93 Difference]: Finished difference Result 35653 states and 50293 transitions. [2020-12-22 09:52:40,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:52:40,115 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:52:40,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:40,170 INFO L225 Difference]: With dead ends: 35653 [2020-12-22 09:52:40,170 INFO L226 Difference]: Without dead ends: 33219 [2020-12-22 09:52:40,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:52:40,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33219 states. [2020-12-22 09:52:42,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33219 to 23833. [2020-12-22 09:52:42,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23833 states. [2020-12-22 09:52:42,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23833 states to 23833 states and 33551 transitions. [2020-12-22 09:52:42,218 INFO L78 Accepts]: Start accepts. Automaton has 23833 states and 33551 transitions. Word has length 95 [2020-12-22 09:52:42,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:42,218 INFO L481 AbstractCegarLoop]: Abstraction has 23833 states and 33551 transitions. [2020-12-22 09:52:42,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:52:42,218 INFO L276 IsEmpty]: Start isEmpty. Operand 23833 states and 33551 transitions. [2020-12-22 09:52:42,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:52:42,226 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:42,226 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:42,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:52:42,226 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:42,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:42,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1416628636, now seen corresponding path program 1 times [2020-12-22 09:52:42,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:42,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740670069] [2020-12-22 09:52:42,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:42,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:42,521 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2020-12-22 09:52:42,661 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:42,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740670069] [2020-12-22 09:52:42,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824869834] [2020-12-22 09:52:42,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:52:42,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:42,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 09:52:42,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:52:43,240 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:52:43,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:52:43,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 09:52:43,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877434521] [2020-12-22 09:52:43,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 09:52:43,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:43,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 09:52:43,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-12-22 09:52:43,243 INFO L87 Difference]: Start difference. First operand 23833 states and 33551 transitions. Second operand 21 states. [2020-12-22 09:52:58,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:58,210 INFO L93 Difference]: Finished difference Result 140634 states and 195032 transitions. [2020-12-22 09:52:58,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-12-22 09:52:58,211 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2020-12-22 09:52:58,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:58,460 INFO L225 Difference]: With dead ends: 140634 [2020-12-22 09:52:58,461 INFO L226 Difference]: Without dead ends: 119096 [2020-12-22 09:52:58,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4681 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2354, Invalid=10078, Unknown=0, NotChecked=0, Total=12432 [2020-12-22 09:52:58,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119096 states. [2020-12-22 09:53:05,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119096 to 74513. [2020-12-22 09:53:05,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74513 states. [2020-12-22 09:53:05,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74513 states to 74513 states and 102959 transitions. [2020-12-22 09:53:05,365 INFO L78 Accepts]: Start accepts. Automaton has 74513 states and 102959 transitions. Word has length 96 [2020-12-22 09:53:05,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:05,365 INFO L481 AbstractCegarLoop]: Abstraction has 74513 states and 102959 transitions. [2020-12-22 09:53:05,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 09:53:05,365 INFO L276 IsEmpty]: Start isEmpty. Operand 74513 states and 102959 transitions. [2020-12-22 09:53:05,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:53:05,377 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:05,377 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:05,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:53:05,593 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:05,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:05,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1879245087, now seen corresponding path program 1 times [2020-12-22 09:53:05,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:05,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776180413] [2020-12-22 09:53:05,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:05,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:05,929 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:05,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776180413] [2020-12-22 09:53:05,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483672838] [2020-12-22 09:53:05,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:53:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:06,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:53:06,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:53:06,360 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:53:06,790 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:06,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:53:06,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:53:06,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832295293] [2020-12-22 09:53:06,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:53:06,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:06,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:53:06,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:53:06,793 INFO L87 Difference]: Start difference. First operand 74513 states and 102959 transitions. Second operand 17 states. [2020-12-22 09:53:11,010 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-12-22 09:53:11,168 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:53:11,381 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:53:11,625 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-12-22 09:53:12,008 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:53:12,692 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-12-22 09:53:13,044 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:53:13,321 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:53:13,627 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-12-22 09:53:14,346 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:53:14,678 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:53:15,791 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:54:32,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:32,649 INFO L93 Difference]: Finished difference Result 860167 states and 1174554 transitions. [2020-12-22 09:54:32,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 09:54:32,650 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2020-12-22 09:54:32,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:34,352 INFO L225 Difference]: With dead ends: 860167 [2020-12-22 09:54:34,352 INFO L226 Difference]: Without dead ends: 787949 [2020-12-22 09:54:34,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6261 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=2263, Invalid=14249, Unknown=0, NotChecked=0, Total=16512 [2020-12-22 09:54:35,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787949 states. [2020-12-22 09:55:12,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787949 to 337269. [2020-12-22 09:55:12,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337269 states. [2020-12-22 09:55:13,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337269 states to 337269 states and 460023 transitions. [2020-12-22 09:55:13,580 INFO L78 Accepts]: Start accepts. Automaton has 337269 states and 460023 transitions. Word has length 97 [2020-12-22 09:55:13,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:13,580 INFO L481 AbstractCegarLoop]: Abstraction has 337269 states and 460023 transitions. [2020-12-22 09:55:13,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:55:13,580 INFO L276 IsEmpty]: Start isEmpty. Operand 337269 states and 460023 transitions. [2020-12-22 09:55:13,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:55:13,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:13,596 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:13,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:55:13,810 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:13,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:13,811 INFO L82 PathProgramCache]: Analyzing trace with hash -135405655, now seen corresponding path program 1 times [2020-12-22 09:55:13,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:13,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144476481] [2020-12-22 09:55:13,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:13,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:13,903 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:55:13,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144476481] [2020-12-22 09:55:13,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:13,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:55:13,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426105263] [2020-12-22 09:55:13,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:55:13,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:13,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:55:13,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:55:13,906 INFO L87 Difference]: Start difference. First operand 337269 states and 460023 transitions. Second operand 3 states.