/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.7.ufo.BOUNDED-14.pals+Problem12_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:13:16,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:13:16,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:13:16,488 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:13:16,489 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:13:16,490 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:13:16,492 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:13:16,495 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:13:16,497 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:13:16,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:13:16,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:13:16,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:13:16,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:13:16,504 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:13:16,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:13:16,507 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:13:16,508 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:13:16,509 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:13:16,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:13:16,514 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:13:16,516 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:13:16,518 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:13:16,519 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:13:16,520 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:13:16,538 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:13:16,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:13:16,562 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:13:16,563 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:13:16,564 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:13:16,625 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:13:16,625 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:13:16,628 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:13:16,628 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:13:16,628 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:13:16,629 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:13:16,629 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:13:16,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:13:16,631 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:13:16,631 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:13:16,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:13:16,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:13:16,633 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:13:16,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:13:16,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:13:16,634 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:13:16,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:13:16,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:13:16,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:13:16,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:13:16,635 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:13:16,635 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:13:16,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:13:16,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:13:16,635 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:13:16,635 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:13:17,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:13:17,113 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:13:17,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:13:17,117 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:13:17,118 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:13:17,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label05.c [2020-12-22 10:13:17,209 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1041ae780/6f21893af9ea4de8b81532ba07de28f2/FLAG8521e1bec [2020-12-22 10:13:18,298 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:13:18,299 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label05.c [2020-12-22 10:13:18,356 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1041ae780/6f21893af9ea4de8b81532ba07de28f2/FLAG8521e1bec [2020-12-22 10:13:18,691 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1041ae780/6f21893af9ea4de8b81532ba07de28f2 [2020-12-22 10:13:18,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:13:18,700 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:13:18,703 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:13:18,703 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:13:18,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:13:18,709 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:13:18" (1/1) ... [2020-12-22 10:13:18,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@237c2f17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:18, skipping insertion in model container [2020-12-22 10:13:18,712 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:13:18" (1/1) ... [2020-12-22 10:13:18,722 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:13:18,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:13:19,483 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.7.ufo.BOUNDED-14.pals+Problem12_label05.c[20544,20557] [2020-12-22 10:13:19,592 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.7.ufo.BOUNDED-14.pals+Problem12_label05.c[27237,27250] [2020-12-22 10:13:20,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:13:20,566 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:13:20,642 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.7.ufo.BOUNDED-14.pals+Problem12_label05.c[20544,20557] [2020-12-22 10:13:20,668 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.7.ufo.BOUNDED-14.pals+Problem12_label05.c[27237,27250] [2020-12-22 10:13:21,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:13:21,423 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:13:21,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:21 WrapperNode [2020-12-22 10:13:21,425 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:13:21,427 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:13:21,428 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:13:21,428 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:13:21,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:21" (1/1) ... [2020-12-22 10:13:21,522 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:21" (1/1) ... [2020-12-22 10:13:22,018 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:13:22,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:13:22,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:13:22,019 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:13:22,030 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:21" (1/1) ... [2020-12-22 10:13:22,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:21" (1/1) ... [2020-12-22 10:13:22,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:21" (1/1) ... [2020-12-22 10:13:22,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:21" (1/1) ... [2020-12-22 10:13:22,367 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:21" (1/1) ... [2020-12-22 10:13:22,475 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:21" (1/1) ... [2020-12-22 10:13:22,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:21" (1/1) ... [2020-12-22 10:13:22,635 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:13:22,636 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:13:22,637 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:13:22,637 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:13:22,638 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:21" (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 10:13:22,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:13:22,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:13:22,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:13:22,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:13:28,215 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:13:28,216 INFO L299 CfgBuilder]: Removed 40 assume(true) statements. [2020-12-22 10:13:28,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:13:28 BoogieIcfgContainer [2020-12-22 10:13:28,221 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:13:28,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:13:28,227 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:13:28,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:13:28,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:13:18" (1/3) ... [2020-12-22 10:13:28,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@182ed27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:13:28, skipping insertion in model container [2020-12-22 10:13:28,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:21" (2/3) ... [2020-12-22 10:13:28,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@182ed27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:13:28, skipping insertion in model container [2020-12-22 10:13:28,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:13:28" (3/3) ... [2020-12-22 10:13:28,235 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label05.c [2020-12-22 10:13:28,242 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:13:28,248 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:13:28,267 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:13:28,302 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:13:28,303 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:13:28,303 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:13:28,303 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:13:28,303 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:13:28,303 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:13:28,303 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:13:28,304 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:13:28,338 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states. [2020-12-22 10:13:28,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:13:28,349 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:28,350 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] [2020-12-22 10:13:28,350 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:28,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:28,357 INFO L82 PathProgramCache]: Analyzing trace with hash 720070723, now seen corresponding path program 1 times [2020-12-22 10:13:28,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:28,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498207104] [2020-12-22 10:13:28,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:28,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:28,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:13:28,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498207104] [2020-12-22 10:13:28,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:28,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:13:28,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923022183] [2020-12-22 10:13:28,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:13:28,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:28,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:13:28,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:13:28,729 INFO L87 Difference]: Start difference. First operand 944 states. Second operand 2 states. [2020-12-22 10:13:28,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:28,835 INFO L93 Difference]: Finished difference Result 1832 states and 3464 transitions. [2020-12-22 10:13:28,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:13:28,837 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 42 [2020-12-22 10:13:28,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:28,864 INFO L225 Difference]: With dead ends: 1832 [2020-12-22 10:13:28,864 INFO L226 Difference]: Without dead ends: 878 [2020-12-22 10:13:28,873 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 10:13:28,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2020-12-22 10:13:29,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 878. [2020-12-22 10:13:29,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 878 states. [2020-12-22 10:13:29,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1653 transitions. [2020-12-22 10:13:29,016 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1653 transitions. Word has length 42 [2020-12-22 10:13:29,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:29,017 INFO L481 AbstractCegarLoop]: Abstraction has 878 states and 1653 transitions. [2020-12-22 10:13:29,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:13:29,017 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1653 transitions. [2020-12-22 10:13:29,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:13:29,020 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:29,020 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:29,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:13:29,021 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:29,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:29,021 INFO L82 PathProgramCache]: Analyzing trace with hash 325703937, now seen corresponding path program 1 times [2020-12-22 10:13:29,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:29,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128776352] [2020-12-22 10:13:29,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:29,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:29,177 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 10:13:29,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128776352] [2020-12-22 10:13:29,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:29,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:13:29,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631609069] [2020-12-22 10:13:29,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:13:29,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:29,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:13:29,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:13:29,184 INFO L87 Difference]: Start difference. First operand 878 states and 1653 transitions. Second operand 5 states. [2020-12-22 10:13:29,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:29,373 INFO L93 Difference]: Finished difference Result 950 states and 1765 transitions. [2020-12-22 10:13:29,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:13:29,374 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 10:13:29,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:29,383 INFO L225 Difference]: With dead ends: 950 [2020-12-22 10:13:29,383 INFO L226 Difference]: Without dead ends: 878 [2020-12-22 10:13:29,389 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 10:13:29,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2020-12-22 10:13:29,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 878. [2020-12-22 10:13:29,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 878 states. [2020-12-22 10:13:29,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1603 transitions. [2020-12-22 10:13:29,414 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1603 transitions. Word has length 42 [2020-12-22 10:13:29,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:29,414 INFO L481 AbstractCegarLoop]: Abstraction has 878 states and 1603 transitions. [2020-12-22 10:13:29,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:13:29,415 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1603 transitions. [2020-12-22 10:13:29,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 10:13:29,419 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:29,420 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:29,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:13:29,420 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:29,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:29,421 INFO L82 PathProgramCache]: Analyzing trace with hash -537240347, now seen corresponding path program 1 times [2020-12-22 10:13:29,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:29,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737494491] [2020-12-22 10:13:29,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:29,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:29,649 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 10:13:29,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737494491] [2020-12-22 10:13:29,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:29,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:29,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847332341] [2020-12-22 10:13:29,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:13:29,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:29,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:13:29,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:13:29,653 INFO L87 Difference]: Start difference. First operand 878 states and 1603 transitions. Second operand 4 states. [2020-12-22 10:13:41,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:41,367 INFO L93 Difference]: Finished difference Result 3133 states and 5912 transitions. [2020-12-22 10:13:41,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:13:41,369 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-12-22 10:13:41,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:41,383 INFO L225 Difference]: With dead ends: 3133 [2020-12-22 10:13:41,383 INFO L226 Difference]: Without dead ends: 2380 [2020-12-22 10:13:41,385 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 10:13:41,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2020-12-22 10:13:41,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 2380. [2020-12-22 10:13:41,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2380 states. [2020-12-22 10:13:41,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 3729 transitions. [2020-12-22 10:13:41,437 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 3729 transitions. Word has length 60 [2020-12-22 10:13:41,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:41,438 INFO L481 AbstractCegarLoop]: Abstraction has 2380 states and 3729 transitions. [2020-12-22 10:13:41,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:13:41,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 3729 transitions. [2020-12-22 10:13:41,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:13:41,441 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:41,442 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:41,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:13:41,442 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:41,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:41,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1207745120, now seen corresponding path program 1 times [2020-12-22 10:13:41,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:41,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796250699] [2020-12-22 10:13:41,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:41,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:41,560 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 10:13:41,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796250699] [2020-12-22 10:13:41,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:41,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:41,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738994656] [2020-12-22 10:13:41,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:41,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:41,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:41,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:41,564 INFO L87 Difference]: Start difference. First operand 2380 states and 3729 transitions. Second operand 3 states. [2020-12-22 10:13:41,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:41,604 INFO L93 Difference]: Finished difference Result 2510 states and 3935 transitions. [2020-12-22 10:13:41,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:41,605 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:13:41,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:41,618 INFO L225 Difference]: With dead ends: 2510 [2020-12-22 10:13:41,618 INFO L226 Difference]: Without dead ends: 2442 [2020-12-22 10:13:41,620 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 10:13:41,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2020-12-22 10:13:41,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2440. [2020-12-22 10:13:41,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2440 states. [2020-12-22 10:13:41,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 3825 transitions. [2020-12-22 10:13:41,675 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 3825 transitions. Word has length 91 [2020-12-22 10:13:41,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:41,676 INFO L481 AbstractCegarLoop]: Abstraction has 2440 states and 3825 transitions. [2020-12-22 10:13:41,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:41,676 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 3825 transitions. [2020-12-22 10:13:41,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:13:41,677 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:41,678 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:41,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:13:41,678 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:41,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:41,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1564953708, now seen corresponding path program 1 times [2020-12-22 10:13:41,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:41,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891975972] [2020-12-22 10:13:41,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:41,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:41,827 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 10:13:41,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891975972] [2020-12-22 10:13:41,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:41,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:41,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578273734] [2020-12-22 10:13:41,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:41,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:41,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:41,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:41,830 INFO L87 Difference]: Start difference. First operand 2440 states and 3825 transitions. Second operand 3 states. [2020-12-22 10:13:41,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:41,881 INFO L93 Difference]: Finished difference Result 2684 states and 4213 transitions. [2020-12-22 10:13:41,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:41,882 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:13:41,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:41,895 INFO L225 Difference]: With dead ends: 2684 [2020-12-22 10:13:41,896 INFO L226 Difference]: Without dead ends: 2556 [2020-12-22 10:13:41,897 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 10:13:41,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2020-12-22 10:13:41,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2554. [2020-12-22 10:13:41,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2554 states. [2020-12-22 10:13:41,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2554 states to 2554 states and 4006 transitions. [2020-12-22 10:13:41,966 INFO L78 Accepts]: Start accepts. Automaton has 2554 states and 4006 transitions. Word has length 91 [2020-12-22 10:13:41,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:41,969 INFO L481 AbstractCegarLoop]: Abstraction has 2554 states and 4006 transitions. [2020-12-22 10:13:41,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:41,969 INFO L276 IsEmpty]: Start isEmpty. Operand 2554 states and 4006 transitions. [2020-12-22 10:13:41,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:13:41,970 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:41,971 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:41,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:13:41,971 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:41,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:41,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1479108296, now seen corresponding path program 1 times [2020-12-22 10:13:41,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:41,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602574316] [2020-12-22 10:13:41,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:42,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:42,132 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 10:13:42,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602574316] [2020-12-22 10:13:42,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:42,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:42,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433782724] [2020-12-22 10:13:42,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:42,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:42,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:42,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:42,137 INFO L87 Difference]: Start difference. First operand 2554 states and 4006 transitions. Second operand 3 states. [2020-12-22 10:13:42,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:42,204 INFO L93 Difference]: Finished difference Result 3014 states and 4736 transitions. [2020-12-22 10:13:42,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:42,205 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:13:42,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:42,226 INFO L225 Difference]: With dead ends: 3014 [2020-12-22 10:13:42,227 INFO L226 Difference]: Without dead ends: 2772 [2020-12-22 10:13:42,229 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 10:13:42,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2772 states. [2020-12-22 10:13:42,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2772 to 2770. [2020-12-22 10:13:42,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2770 states. [2020-12-22 10:13:42,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2770 states to 2770 states and 4346 transitions. [2020-12-22 10:13:42,319 INFO L78 Accepts]: Start accepts. Automaton has 2770 states and 4346 transitions. Word has length 91 [2020-12-22 10:13:42,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:42,320 INFO L481 AbstractCegarLoop]: Abstraction has 2770 states and 4346 transitions. [2020-12-22 10:13:42,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:42,321 INFO L276 IsEmpty]: Start isEmpty. Operand 2770 states and 4346 transitions. [2020-12-22 10:13:42,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:13:42,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:42,329 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:42,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:13:42,330 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:42,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:42,335 INFO L82 PathProgramCache]: Analyzing trace with hash 733525566, now seen corresponding path program 1 times [2020-12-22 10:13:42,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:42,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294105025] [2020-12-22 10:13:42,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:42,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:42,462 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 10:13:42,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294105025] [2020-12-22 10:13:42,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:42,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:42,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912167138] [2020-12-22 10:13:42,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:42,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:42,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:42,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:42,465 INFO L87 Difference]: Start difference. First operand 2770 states and 4346 transitions. Second operand 3 states. [2020-12-22 10:13:42,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:42,528 INFO L93 Difference]: Finished difference Result 3638 states and 5716 transitions. [2020-12-22 10:13:42,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:42,529 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:13:42,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:42,544 INFO L225 Difference]: With dead ends: 3638 [2020-12-22 10:13:42,544 INFO L226 Difference]: Without dead ends: 3180 [2020-12-22 10:13:42,547 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 10:13:42,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3180 states. [2020-12-22 10:13:42,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3180 to 3178. [2020-12-22 10:13:42,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-12-22 10:13:42,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 4982 transitions. [2020-12-22 10:13:42,638 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 4982 transitions. Word has length 91 [2020-12-22 10:13:42,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:42,639 INFO L481 AbstractCegarLoop]: Abstraction has 3178 states and 4982 transitions. [2020-12-22 10:13:42,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:42,639 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 4982 transitions. [2020-12-22 10:13:42,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:13:42,640 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:42,640 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:42,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:13:42,641 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:42,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:42,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1206505292, now seen corresponding path program 1 times [2020-12-22 10:13:42,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:42,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669020425] [2020-12-22 10:13:42,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:42,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:42,739 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 10:13:42,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669020425] [2020-12-22 10:13:42,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:42,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:42,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011845123] [2020-12-22 10:13:42,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:42,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:42,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:42,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:42,744 INFO L87 Difference]: Start difference. First operand 3178 states and 4982 transitions. Second operand 3 states. [2020-12-22 10:13:42,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:42,828 INFO L93 Difference]: Finished difference Result 4814 states and 7544 transitions. [2020-12-22 10:13:42,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:42,829 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:13:42,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:42,850 INFO L225 Difference]: With dead ends: 4814 [2020-12-22 10:13:42,850 INFO L226 Difference]: Without dead ends: 3948 [2020-12-22 10:13:42,854 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 10:13:42,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2020-12-22 10:13:42,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 3946. [2020-12-22 10:13:42,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3946 states. [2020-12-22 10:13:42,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3946 states to 3946 states and 6166 transitions. [2020-12-22 10:13:43,000 INFO L78 Accepts]: Start accepts. Automaton has 3946 states and 6166 transitions. Word has length 91 [2020-12-22 10:13:43,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:43,000 INFO L481 AbstractCegarLoop]: Abstraction has 3946 states and 6166 transitions. [2020-12-22 10:13:43,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:43,001 INFO L276 IsEmpty]: Start isEmpty. Operand 3946 states and 6166 transitions. [2020-12-22 10:13:43,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:13:43,002 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:43,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:43,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:13:43,002 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:43,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:43,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1494177322, now seen corresponding path program 1 times [2020-12-22 10:13:43,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:43,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002492680] [2020-12-22 10:13:43,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:43,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:43,234 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 10:13:43,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002492680] [2020-12-22 10:13:43,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:43,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:13:43,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646016410] [2020-12-22 10:13:43,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:13:43,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:43,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:13:43,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:13:43,241 INFO L87 Difference]: Start difference. First operand 3946 states and 6166 transitions. Second operand 9 states. [2020-12-22 10:13:44,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:44,439 INFO L93 Difference]: Finished difference Result 26822 states and 41796 transitions. [2020-12-22 10:13:44,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:13:44,440 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2020-12-22 10:13:44,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:44,537 INFO L225 Difference]: With dead ends: 26822 [2020-12-22 10:13:44,538 INFO L226 Difference]: Without dead ends: 25188 [2020-12-22 10:13:44,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:13:44,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25188 states. [2020-12-22 10:13:44,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25188 to 5578. [2020-12-22 10:13:44,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5578 states. [2020-12-22 10:13:45,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5578 states to 5578 states and 8646 transitions. [2020-12-22 10:13:45,009 INFO L78 Accepts]: Start accepts. Automaton has 5578 states and 8646 transitions. Word has length 91 [2020-12-22 10:13:45,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:45,009 INFO L481 AbstractCegarLoop]: Abstraction has 5578 states and 8646 transitions. [2020-12-22 10:13:45,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:13:45,009 INFO L276 IsEmpty]: Start isEmpty. Operand 5578 states and 8646 transitions. [2020-12-22 10:13:45,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:13:45,011 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:45,011 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:13:45,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:13:45,011 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:45,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:45,012 INFO L82 PathProgramCache]: Analyzing trace with hash -30360326, now seen corresponding path program 1 times [2020-12-22 10:13:45,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:45,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479445132] [2020-12-22 10:13:45,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:45,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:45,083 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 10:13:45,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479445132] [2020-12-22 10:13:45,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:45,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:45,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674282497] [2020-12-22 10:13:45,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:45,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:45,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:45,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:45,085 INFO L87 Difference]: Start difference. First operand 5578 states and 8646 transitions. Second operand 3 states. [2020-12-22 10:13:45,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:45,490 INFO L93 Difference]: Finished difference Result 10400 states and 16058 transitions. [2020-12-22 10:13:45,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:45,493 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:13:45,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:45,516 INFO L225 Difference]: With dead ends: 10400 [2020-12-22 10:13:45,517 INFO L226 Difference]: Without dead ends: 7134 [2020-12-22 10:13:45,524 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 10:13:45,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7134 states. [2020-12-22 10:13:45,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7134 to 7132. [2020-12-22 10:13:45,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7132 states. [2020-12-22 10:13:45,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7132 states to 7132 states and 10984 transitions. [2020-12-22 10:13:45,947 INFO L78 Accepts]: Start accepts. Automaton has 7132 states and 10984 transitions. Word has length 93 [2020-12-22 10:13:45,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:45,947 INFO L481 AbstractCegarLoop]: Abstraction has 7132 states and 10984 transitions. [2020-12-22 10:13:45,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:45,948 INFO L276 IsEmpty]: Start isEmpty. Operand 7132 states and 10984 transitions. [2020-12-22 10:13:45,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:13:45,949 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:45,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:45,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:13:45,950 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:45,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:45,950 INFO L82 PathProgramCache]: Analyzing trace with hash 36133186, now seen corresponding path program 1 times [2020-12-22 10:13:45,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:45,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949516778] [2020-12-22 10:13:45,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:45,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:46,244 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 10:13:46,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949516778] [2020-12-22 10:13:46,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:46,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:13:46,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836297100] [2020-12-22 10:13:46,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:13:46,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:46,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:13:46,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:13:46,246 INFO L87 Difference]: Start difference. First operand 7132 states and 10984 transitions. Second operand 9 states. [2020-12-22 10:13:47,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:47,007 INFO L93 Difference]: Finished difference Result 11952 states and 18346 transitions. [2020-12-22 10:13:47,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:13:47,008 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-12-22 10:13:47,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:47,025 INFO L225 Difference]: With dead ends: 11952 [2020-12-22 10:13:47,025 INFO L226 Difference]: Without dead ends: 7134 [2020-12-22 10:13:47,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:13:47,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7134 states. [2020-12-22 10:13:47,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7134 to 7132. [2020-12-22 10:13:47,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7132 states. [2020-12-22 10:13:47,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7132 states to 7132 states and 10936 transitions. [2020-12-22 10:13:47,396 INFO L78 Accepts]: Start accepts. Automaton has 7132 states and 10936 transitions. Word has length 93 [2020-12-22 10:13:47,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:47,396 INFO L481 AbstractCegarLoop]: Abstraction has 7132 states and 10936 transitions. [2020-12-22 10:13:47,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:13:47,397 INFO L276 IsEmpty]: Start isEmpty. Operand 7132 states and 10936 transitions. [2020-12-22 10:13:47,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:13:47,398 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:47,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:13:47,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:13:47,398 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:47,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:47,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1825047262, now seen corresponding path program 1 times [2020-12-22 10:13:47,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:47,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092869365] [2020-12-22 10:13:47,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:47,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:47,496 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 10:13:47,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092869365] [2020-12-22 10:13:47,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:47,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:47,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094609993] [2020-12-22 10:13:47,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:47,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:47,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:47,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:47,498 INFO L87 Difference]: Start difference. First operand 7132 states and 10936 transitions. Second operand 3 states. [2020-12-22 10:13:48,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:48,204 INFO L93 Difference]: Finished difference Result 16192 states and 24602 transitions. [2020-12-22 10:13:48,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:48,205 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:13:48,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:48,229 INFO L225 Difference]: With dead ends: 16192 [2020-12-22 10:13:48,230 INFO L226 Difference]: Without dead ends: 11374 [2020-12-22 10:13:48,240 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 10:13:48,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11374 states. [2020-12-22 10:13:48,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11374 to 11372. [2020-12-22 10:13:48,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11372 states. [2020-12-22 10:13:48,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11372 states to 11372 states and 17192 transitions. [2020-12-22 10:13:48,874 INFO L78 Accepts]: Start accepts. Automaton has 11372 states and 17192 transitions. Word has length 93 [2020-12-22 10:13:48,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:48,874 INFO L481 AbstractCegarLoop]: Abstraction has 11372 states and 17192 transitions. [2020-12-22 10:13:48,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:48,875 INFO L276 IsEmpty]: Start isEmpty. Operand 11372 states and 17192 transitions. [2020-12-22 10:13:48,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:13:48,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:48,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:48,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:13:48,876 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:48,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:48,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1222412418, now seen corresponding path program 1 times [2020-12-22 10:13:48,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:48,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448122268] [2020-12-22 10:13:48,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:48,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:48,941 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 10:13:48,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448122268] [2020-12-22 10:13:48,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:48,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:48,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8449738] [2020-12-22 10:13:48,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:48,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:48,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:48,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:48,949 INFO L87 Difference]: Start difference. First operand 11372 states and 17192 transitions. Second operand 3 states. [2020-12-22 10:13:49,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:49,771 INFO L93 Difference]: Finished difference Result 28336 states and 42410 transitions. [2020-12-22 10:13:49,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:49,772 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:13:49,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:49,820 INFO L225 Difference]: With dead ends: 28336 [2020-12-22 10:13:49,820 INFO L226 Difference]: Without dead ends: 19278 [2020-12-22 10:13:49,837 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 10:13:49,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19278 states. [2020-12-22 10:13:51,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19278 to 19276. [2020-12-22 10:13:51,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19276 states. [2020-12-22 10:13:51,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19276 states to 19276 states and 28648 transitions. [2020-12-22 10:13:51,349 INFO L78 Accepts]: Start accepts. Automaton has 19276 states and 28648 transitions. Word has length 93 [2020-12-22 10:13:51,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:51,349 INFO L481 AbstractCegarLoop]: Abstraction has 19276 states and 28648 transitions. [2020-12-22 10:13:51,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:51,351 INFO L276 IsEmpty]: Start isEmpty. Operand 19276 states and 28648 transitions. [2020-12-22 10:13:51,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:13:51,352 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:51,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:51,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:13:51,352 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:51,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:51,353 INFO L82 PathProgramCache]: Analyzing trace with hash 705405902, now seen corresponding path program 1 times [2020-12-22 10:13:51,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:51,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917245371] [2020-12-22 10:13:51,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:51,453 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 10:13:51,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917245371] [2020-12-22 10:13:51,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:51,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:13:51,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353328351] [2020-12-22 10:13:51,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:13:51,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:51,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:13:51,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:13:51,456 INFO L87 Difference]: Start difference. First operand 19276 states and 28648 transitions. Second operand 6 states. [2020-12-22 10:13:52,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:52,687 INFO L93 Difference]: Finished difference Result 36238 states and 53673 transitions. [2020-12-22 10:13:52,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:13:52,688 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-12-22 10:13:52,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:52,728 INFO L225 Difference]: With dead ends: 36238 [2020-12-22 10:13:52,728 INFO L226 Difference]: Without dead ends: 19276 [2020-12-22 10:13:52,750 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 10:13:52,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19276 states. [2020-12-22 10:13:54,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19276 to 19276. [2020-12-22 10:13:54,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19276 states. [2020-12-22 10:13:54,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19276 states to 19276 states and 28392 transitions. [2020-12-22 10:13:54,657 INFO L78 Accepts]: Start accepts. Automaton has 19276 states and 28392 transitions. Word has length 94 [2020-12-22 10:13:54,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:54,657 INFO L481 AbstractCegarLoop]: Abstraction has 19276 states and 28392 transitions. [2020-12-22 10:13:54,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:13:54,657 INFO L276 IsEmpty]: Start isEmpty. Operand 19276 states and 28392 transitions. [2020-12-22 10:13:54,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:13:54,658 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:54,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:13:54,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:13:54,658 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:54,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:54,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1549411404, now seen corresponding path program 1 times [2020-12-22 10:13:54,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:54,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524862395] [2020-12-22 10:13:54,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:54,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:54,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:13:54,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524862395] [2020-12-22 10:13:54,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:54,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:13:54,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480363513] [2020-12-22 10:13:54,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:13:54,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:54,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:13:54,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:13:54,750 INFO L87 Difference]: Start difference. First operand 19276 states and 28392 transitions. Second operand 6 states. [2020-12-22 10:13:55,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:55,685 INFO L93 Difference]: Finished difference Result 36238 states and 53161 transitions. [2020-12-22 10:13:55,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:13:55,686 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-12-22 10:13:55,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:55,726 INFO L225 Difference]: With dead ends: 36238 [2020-12-22 10:13:55,726 INFO L226 Difference]: Without dead ends: 19276 [2020-12-22 10:13:55,748 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 10:13:55,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19276 states. [2020-12-22 10:13:56,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19276 to 19276. [2020-12-22 10:13:56,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19276 states. [2020-12-22 10:13:56,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19276 states to 19276 states and 28200 transitions. [2020-12-22 10:13:56,905 INFO L78 Accepts]: Start accepts. Automaton has 19276 states and 28200 transitions. Word has length 94 [2020-12-22 10:13:56,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:56,905 INFO L481 AbstractCegarLoop]: Abstraction has 19276 states and 28200 transitions. [2020-12-22 10:13:56,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:13:56,906 INFO L276 IsEmpty]: Start isEmpty. Operand 19276 states and 28200 transitions. [2020-12-22 10:13:56,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:13:56,907 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:56,907 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:13:56,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:13:56,907 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:56,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:56,908 INFO L82 PathProgramCache]: Analyzing trace with hash 847811530, now seen corresponding path program 1 times [2020-12-22 10:13:56,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:56,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723195204] [2020-12-22 10:13:56,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:57,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:13:57,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723195204] [2020-12-22 10:13:57,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:57,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:13:57,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83731128] [2020-12-22 10:13:57,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:13:57,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:57,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:13:57,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:13:57,129 INFO L87 Difference]: Start difference. First operand 19276 states and 28200 transitions. Second operand 8 states. [2020-12-22 10:13:59,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:59,315 INFO L93 Difference]: Finished difference Result 33775 states and 48850 transitions. [2020-12-22 10:13:59,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:13:59,316 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 94 [2020-12-22 10:13:59,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:59,385 INFO L225 Difference]: With dead ends: 33775 [2020-12-22 10:13:59,385 INFO L226 Difference]: Without dead ends: 33773 [2020-12-22 10:13:59,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:13:59,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33773 states. [2020-12-22 10:14:00,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33773 to 20044. [2020-12-22 10:14:00,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20044 states. [2020-12-22 10:14:00,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20044 states to 20044 states and 28904 transitions. [2020-12-22 10:14:00,866 INFO L78 Accepts]: Start accepts. Automaton has 20044 states and 28904 transitions. Word has length 94 [2020-12-22 10:14:00,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:00,866 INFO L481 AbstractCegarLoop]: Abstraction has 20044 states and 28904 transitions. [2020-12-22 10:14:00,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:14:00,866 INFO L276 IsEmpty]: Start isEmpty. Operand 20044 states and 28904 transitions. [2020-12-22 10:14:00,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:14:00,882 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:00,882 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 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 10:14:00,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:14:00,883 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:00,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:00,883 INFO L82 PathProgramCache]: Analyzing trace with hash 101873069, now seen corresponding path program 1 times [2020-12-22 10:14:00,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:00,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359426950] [2020-12-22 10:14:00,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:00,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:01,061 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:14:01,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359426950] [2020-12-22 10:14:01,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:01,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:14:01,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841121192] [2020-12-22 10:14:01,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:14:01,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:01,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:14:01,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:14:01,063 INFO L87 Difference]: Start difference. First operand 20044 states and 28904 transitions. Second operand 9 states. [2020-12-22 10:14:08,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:08,623 INFO L93 Difference]: Finished difference Result 147612 states and 210640 transitions. [2020-12-22 10:14:08,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:14:08,624 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:14:08,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:09,078 INFO L225 Difference]: With dead ends: 147612 [2020-12-22 10:14:09,079 INFO L226 Difference]: Without dead ends: 129882 [2020-12-22 10:14:09,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:14:09,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129882 states. [2020-12-22 10:14:12,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129882 to 37772. [2020-12-22 10:14:12,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37772 states. [2020-12-22 10:14:12,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37772 states to 37772 states and 53992 transitions. [2020-12-22 10:14:12,580 INFO L78 Accepts]: Start accepts. Automaton has 37772 states and 53992 transitions. Word has length 130 [2020-12-22 10:14:12,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:12,580 INFO L481 AbstractCegarLoop]: Abstraction has 37772 states and 53992 transitions. [2020-12-22 10:14:12,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:14:12,580 INFO L276 IsEmpty]: Start isEmpty. Operand 37772 states and 53992 transitions. [2020-12-22 10:14:12,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:14:12,595 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:12,595 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 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 10:14:12,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:14:12,596 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:12,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:12,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1349380685, now seen corresponding path program 1 times [2020-12-22 10:14:12,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:12,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101690476] [2020-12-22 10:14:12,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:12,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:12,757 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:14:12,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101690476] [2020-12-22 10:14:12,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:12,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:14:12,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638385966] [2020-12-22 10:14:12,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:14:12,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:12,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:14:12,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:14:12,759 INFO L87 Difference]: Start difference. First operand 37772 states and 53992 transitions. Second operand 9 states. [2020-12-22 10:14:22,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:22,694 INFO L93 Difference]: Finished difference Result 165340 states and 235728 transitions. [2020-12-22 10:14:22,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:14:22,695 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:14:22,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:22,899 INFO L225 Difference]: With dead ends: 165340 [2020-12-22 10:14:22,899 INFO L226 Difference]: Without dead ends: 147610 [2020-12-22 10:14:23,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:14:23,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147610 states. [2020-12-22 10:14:28,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147610 to 64396. [2020-12-22 10:14:28,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64396 states. [2020-12-22 10:14:28,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64396 states to 64396 states and 91464 transitions. [2020-12-22 10:14:28,807 INFO L78 Accepts]: Start accepts. Automaton has 64396 states and 91464 transitions. Word has length 130 [2020-12-22 10:14:28,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:28,807 INFO L481 AbstractCegarLoop]: Abstraction has 64396 states and 91464 transitions. [2020-12-22 10:14:28,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:14:28,807 INFO L276 IsEmpty]: Start isEmpty. Operand 64396 states and 91464 transitions. [2020-12-22 10:14:28,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:14:28,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:28,822 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 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 10:14:28,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:14:28,822 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:28,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:28,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1476153629, now seen corresponding path program 1 times [2020-12-22 10:14:28,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:28,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879586775] [2020-12-22 10:14:28,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:28,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:29,000 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 10:14:29,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879586775] [2020-12-22 10:14:29,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:29,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:14:29,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458311816] [2020-12-22 10:14:29,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:14:29,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:29,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:14:29,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:14:29,004 INFO L87 Difference]: Start difference. First operand 64396 states and 91464 transitions. Second operand 9 states. [2020-12-22 10:14:40,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:40,956 INFO L93 Difference]: Finished difference Result 183068 states and 260816 transitions. [2020-12-22 10:14:40,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:14:40,957 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:14:40,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:41,160 INFO L225 Difference]: With dead ends: 183068 [2020-12-22 10:14:41,161 INFO L226 Difference]: Without dead ends: 165338 [2020-12-22 10:14:41,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:14:41,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165338 states. [2020-12-22 10:14:48,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165338 to 82124. [2020-12-22 10:14:48,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82124 states. [2020-12-22 10:14:48,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82124 states to 82124 states and 116552 transitions. [2020-12-22 10:14:48,529 INFO L78 Accepts]: Start accepts. Automaton has 82124 states and 116552 transitions. Word has length 130 [2020-12-22 10:14:48,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:48,530 INFO L481 AbstractCegarLoop]: Abstraction has 82124 states and 116552 transitions. [2020-12-22 10:14:48,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:14:48,530 INFO L276 IsEmpty]: Start isEmpty. Operand 82124 states and 116552 transitions. [2020-12-22 10:14:48,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:14:48,544 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:48,544 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 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 10:14:48,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:14:48,545 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:48,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:48,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1583354627, now seen corresponding path program 1 times [2020-12-22 10:14:48,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:48,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318024986] [2020-12-22 10:14:48,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:48,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:48,712 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 10:14:48,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318024986] [2020-12-22 10:14:48,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:48,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:14:48,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006734587] [2020-12-22 10:14:48,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:14:48,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:48,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:14:48,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:14:48,714 INFO L87 Difference]: Start difference. First operand 82124 states and 116552 transitions. Second operand 9 states. [2020-12-22 10:15:03,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:03,094 INFO L93 Difference]: Finished difference Result 200796 states and 285904 transitions. [2020-12-22 10:15:03,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:15:03,095 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:15:03,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:03,527 INFO L225 Difference]: With dead ends: 200796 [2020-12-22 10:15:03,527 INFO L226 Difference]: Without dead ends: 183066 [2020-12-22 10:15:03,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:15:03,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183066 states. [2020-12-22 10:15:12,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183066 to 99852. [2020-12-22 10:15:12,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99852 states. [2020-12-22 10:15:12,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99852 states to 99852 states and 141640 transitions. [2020-12-22 10:15:12,844 INFO L78 Accepts]: Start accepts. Automaton has 99852 states and 141640 transitions. Word has length 130 [2020-12-22 10:15:12,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:12,845 INFO L481 AbstractCegarLoop]: Abstraction has 99852 states and 141640 transitions. [2020-12-22 10:15:12,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:15:12,845 INFO L276 IsEmpty]: Start isEmpty. Operand 99852 states and 141640 transitions. [2020-12-22 10:15:12,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:15:12,863 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:12,863 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 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 10:15:12,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:15:12,864 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:12,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:12,864 INFO L82 PathProgramCache]: Analyzing trace with hash 162359075, now seen corresponding path program 1 times [2020-12-22 10:15:12,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:12,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512708054] [2020-12-22 10:15:12,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:12,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:13,028 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 10:15:13,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512708054] [2020-12-22 10:15:13,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:13,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:15:13,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658338999] [2020-12-22 10:15:13,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:15:13,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:13,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:15:13,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:15:13,031 INFO L87 Difference]: Start difference. First operand 99852 states and 141640 transitions. Second operand 9 states. [2020-12-22 10:15:30,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:30,344 INFO L93 Difference]: Finished difference Result 218524 states and 310992 transitions. [2020-12-22 10:15:30,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:15:30,345 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:15:30,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:30,764 INFO L225 Difference]: With dead ends: 218524 [2020-12-22 10:15:30,765 INFO L226 Difference]: Without dead ends: 200794 [2020-12-22 10:15:30,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:15:30,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200794 states. [2020-12-22 10:15:41,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200794 to 117580. [2020-12-22 10:15:41,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117580 states. [2020-12-22 10:15:42,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117580 states to 117580 states and 166728 transitions. [2020-12-22 10:15:42,087 INFO L78 Accepts]: Start accepts. Automaton has 117580 states and 166728 transitions. Word has length 130 [2020-12-22 10:15:42,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:42,087 INFO L481 AbstractCegarLoop]: Abstraction has 117580 states and 166728 transitions. [2020-12-22 10:15:42,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:15:42,087 INFO L276 IsEmpty]: Start isEmpty. Operand 117580 states and 166728 transitions. [2020-12-22 10:15:42,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:15:42,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:42,102 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 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 10:15:42,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:15:42,103 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:42,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:42,103 INFO L82 PathProgramCache]: Analyzing trace with hash -403461309, now seen corresponding path program 1 times [2020-12-22 10:15:42,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:42,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060097418] [2020-12-22 10:15:42,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:42,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:42,333 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 10:15:42,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060097418] [2020-12-22 10:15:42,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:42,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:15:42,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027028895] [2020-12-22 10:15:42,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:15:42,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:42,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:15:42,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:15:42,335 INFO L87 Difference]: Start difference. First operand 117580 states and 166728 transitions. Second operand 9 states. [2020-12-22 10:16:03,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:03,243 INFO L93 Difference]: Finished difference Result 236252 states and 336080 transitions. [2020-12-22 10:16:03,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:16:03,244 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:16:03,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:03,735 INFO L225 Difference]: With dead ends: 236252 [2020-12-22 10:16:03,735 INFO L226 Difference]: Without dead ends: 218522 [2020-12-22 10:16:03,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:16:03,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218522 states. [2020-12-22 10:16:17,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218522 to 135308. [2020-12-22 10:16:17,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135308 states. [2020-12-22 10:16:17,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135308 states to 135308 states and 191816 transitions. [2020-12-22 10:16:17,908 INFO L78 Accepts]: Start accepts. Automaton has 135308 states and 191816 transitions. Word has length 130 [2020-12-22 10:16:17,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:17,908 INFO L481 AbstractCegarLoop]: Abstraction has 135308 states and 191816 transitions. [2020-12-22 10:16:17,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:16:17,908 INFO L276 IsEmpty]: Start isEmpty. Operand 135308 states and 191816 transitions. [2020-12-22 10:16:18,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:16:18,196 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:18,196 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 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 10:16:18,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:16:18,196 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:18,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:18,197 INFO L82 PathProgramCache]: Analyzing trace with hash -214245533, now seen corresponding path program 1 times [2020-12-22 10:16:18,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:18,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879419377] [2020-12-22 10:16:18,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:18,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:18,396 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:16:18,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879419377] [2020-12-22 10:16:18,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:18,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:16:18,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175056991] [2020-12-22 10:16:18,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:16:18,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:18,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:16:18,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:16:18,399 INFO L87 Difference]: Start difference. First operand 135308 states and 191816 transitions. Second operand 9 states. [2020-12-22 10:16:42,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:42,777 INFO L93 Difference]: Finished difference Result 243100 states and 345936 transitions. [2020-12-22 10:16:42,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:16:42,778 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:16:42,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:43,092 INFO L225 Difference]: With dead ends: 243100 [2020-12-22 10:16:43,092 INFO L226 Difference]: Without dead ends: 230810 [2020-12-22 10:16:43,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:16:43,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230810 states. [2020-12-22 10:16:59,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230810 to 147596. [2020-12-22 10:16:59,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147596 states. [2020-12-22 10:17:00,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147596 states to 147596 states and 209352 transitions. [2020-12-22 10:17:00,042 INFO L78 Accepts]: Start accepts. Automaton has 147596 states and 209352 transitions. Word has length 130 [2020-12-22 10:17:00,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:00,043 INFO L481 AbstractCegarLoop]: Abstraction has 147596 states and 209352 transitions. [2020-12-22 10:17:00,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:17:00,043 INFO L276 IsEmpty]: Start isEmpty. Operand 147596 states and 209352 transitions. [2020-12-22 10:17:00,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 10:17:00,061 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:00,062 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 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 10:17:00,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 10:17:00,062 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:00,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:00,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1524812958, now seen corresponding path program 1 times [2020-12-22 10:17:00,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:00,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165485588] [2020-12-22 10:17:00,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:00,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:00,135 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:17:00,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165485588] [2020-12-22 10:17:00,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:00,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:17:00,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053992756] [2020-12-22 10:17:00,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:17:00,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:00,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:17:00,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:17:00,137 INFO L87 Difference]: Start difference. First operand 147596 states and 209352 transitions. Second operand 3 states.