/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.3.ufo.BOUNDED-6.pals+Problem12_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:34:23,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:34:23,632 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:34:23,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:34:23,685 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:34:23,689 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:34:23,693 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:34:23,701 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:34:23,704 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:34:23,710 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:34:23,711 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:34:23,713 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:34:23,713 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:34:23,716 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:34:23,718 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:34:23,720 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:34:23,721 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:34:23,724 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:34:23,732 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:34:23,741 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:34:23,743 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:34:23,745 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:34:23,747 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:34:23,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:34:23,765 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:34:23,776 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:34:23,777 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:34:23,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:34:23,779 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:34:23,829 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:34:23,830 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:34:23,835 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:34:23,835 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:34:23,835 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:34:23,835 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:34:23,836 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:34:23,836 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:34:23,836 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:34:23,836 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:34:23,838 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:34:23,838 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:34:23,838 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:34:23,838 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:34:23,838 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:34:23,839 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:34:23,839 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:34:23,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:34:23,839 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:34:23,839 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:34:23,840 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:34:23,840 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:34:23,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:34:23,840 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:34:23,840 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:34:23,841 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:34:24,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:34:24,265 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:34:24,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:34:24,270 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:34:24,271 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:34:24,272 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label02.c [2020-12-22 09:34:24,365 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/860735d7b/ddb181fd378347da95a8f486fea9f704/FLAG71c6f0044 [2020-12-22 09:34:25,460 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:34:25,461 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label02.c [2020-12-22 09:34:25,502 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/860735d7b/ddb181fd378347da95a8f486fea9f704/FLAG71c6f0044 [2020-12-22 09:34:25,919 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/860735d7b/ddb181fd378347da95a8f486fea9f704 [2020-12-22 09:34:25,923 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:34:25,925 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:34:25,930 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:34:25,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:34:25,935 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:34:25,936 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:34:25" (1/1) ... [2020-12-22 09:34:25,938 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39cd71e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:25, skipping insertion in model container [2020-12-22 09:34:25,939 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:34:25" (1/1) ... [2020-12-22 09:34:25,948 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:34:26,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:34:26,623 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.3.ufo.BOUNDED-6.pals+Problem12_label02.c[6412,6425] [2020-12-22 09:34:26,718 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.3.ufo.BOUNDED-6.pals+Problem12_label02.c[13459,13472] [2020-12-22 09:34:27,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:34:27,836 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:34:27,904 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.3.ufo.BOUNDED-6.pals+Problem12_label02.c[6412,6425] [2020-12-22 09:34:27,925 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.3.ufo.BOUNDED-6.pals+Problem12_label02.c[13459,13472] [2020-12-22 09:34:28,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:34:28,650 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:34:28,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:28 WrapperNode [2020-12-22 09:34:28,652 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:34:28,653 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:34:28,653 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:34:28,653 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:34:28,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:28" (1/1) ... [2020-12-22 09:34:28,735 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:28" (1/1) ... [2020-12-22 09:34:29,106 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:34:29,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:34:29,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:34:29,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:34:29,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:28" (1/1) ... [2020-12-22 09:34:29,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:28" (1/1) ... [2020-12-22 09:34:29,165 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:28" (1/1) ... [2020-12-22 09:34:29,165 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:28" (1/1) ... [2020-12-22 09:34:29,388 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:28" (1/1) ... [2020-12-22 09:34:29,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:28" (1/1) ... [2020-12-22 09:34:29,474 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:28" (1/1) ... [2020-12-22 09:34:29,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:34:29,527 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:34:29,527 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:34:29,527 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:34:29,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:34:29,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:34:29,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:34:29,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:34:29,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:34:35,226 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:34:35,227 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2020-12-22 09:34:35,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:34:35 BoogieIcfgContainer [2020-12-22 09:34:35,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:34:35,233 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:34:35,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:34:35,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:34:35,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:34:25" (1/3) ... [2020-12-22 09:34:35,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ac8a0a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:34:35, skipping insertion in model container [2020-12-22 09:34:35,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:28" (2/3) ... [2020-12-22 09:34:35,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ac8a0a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:34:35, skipping insertion in model container [2020-12-22 09:34:35,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:34:35" (3/3) ... [2020-12-22 09:34:35,241 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label02.c [2020-12-22 09:34:35,248 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:34:35,255 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:34:35,276 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:34:35,312 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:34:35,312 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:34:35,312 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:34:35,313 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:34:35,313 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:34:35,313 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:34:35,313 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:34:35,313 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:34:35,360 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states. [2020-12-22 09:34:35,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 09:34:35,369 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:35,370 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] [2020-12-22 09:34:35,370 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:35,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:35,377 INFO L82 PathProgramCache]: Analyzing trace with hash 975463267, now seen corresponding path program 1 times [2020-12-22 09:34:35,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:35,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536556859] [2020-12-22 09:34:35,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:35,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:35,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536556859] [2020-12-22 09:34:35,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:35,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:34:35,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500055648] [2020-12-22 09:34:35,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:34:35,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:35,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:34:35,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:34:35,665 INFO L87 Difference]: Start difference. First operand 878 states. Second operand 2 states. [2020-12-22 09:34:35,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:35,773 INFO L93 Difference]: Finished difference Result 1734 states and 3292 transitions. [2020-12-22 09:34:35,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:34:35,775 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 26 [2020-12-22 09:34:35,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:35,814 INFO L225 Difference]: With dead ends: 1734 [2020-12-22 09:34:35,814 INFO L226 Difference]: Without dead ends: 812 [2020-12-22 09:34:35,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:34:35,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2020-12-22 09:34:35,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 812. [2020-12-22 09:34:35,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 812 states. [2020-12-22 09:34:35,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1533 transitions. [2020-12-22 09:34:35,940 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1533 transitions. Word has length 26 [2020-12-22 09:34:35,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:35,941 INFO L481 AbstractCegarLoop]: Abstraction has 812 states and 1533 transitions. [2020-12-22 09:34:35,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:34:35,941 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1533 transitions. [2020-12-22 09:34:35,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 09:34:35,943 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:35,943 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:34:35,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:34:35,944 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:35,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:35,947 INFO L82 PathProgramCache]: Analyzing trace with hash 157814817, now seen corresponding path program 1 times [2020-12-22 09:34:35,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:35,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047184940] [2020-12-22 09:34:35,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:36,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:36,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:36,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047184940] [2020-12-22 09:34:36,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:36,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:36,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776955630] [2020-12-22 09:34:36,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:34:36,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:36,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:34:36,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:34:36,167 INFO L87 Difference]: Start difference. First operand 812 states and 1533 transitions. Second operand 5 states. [2020-12-22 09:34:36,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:36,413 INFO L93 Difference]: Finished difference Result 888 states and 1649 transitions. [2020-12-22 09:34:36,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:34:36,414 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-22 09:34:36,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:36,422 INFO L225 Difference]: With dead ends: 888 [2020-12-22 09:34:36,422 INFO L226 Difference]: Without dead ends: 848 [2020-12-22 09:34:36,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:34:36,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2020-12-22 09:34:36,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 812. [2020-12-22 09:34:36,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 812 states. [2020-12-22 09:34:36,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1517 transitions. [2020-12-22 09:34:36,454 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1517 transitions. Word has length 26 [2020-12-22 09:34:36,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:36,454 INFO L481 AbstractCegarLoop]: Abstraction has 812 states and 1517 transitions. [2020-12-22 09:34:36,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:34:36,454 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1517 transitions. [2020-12-22 09:34:36,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:34:36,499 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:36,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:34:36,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:34:36,501 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:36,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:36,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1324654887, now seen corresponding path program 1 times [2020-12-22 09:34:36,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:36,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809496091] [2020-12-22 09:34:36,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:36,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:36,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:36,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809496091] [2020-12-22 09:34:36,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:36,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:34:36,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838344063] [2020-12-22 09:34:36,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:34:36,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:36,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:34:36,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:34:36,646 INFO L87 Difference]: Start difference. First operand 812 states and 1517 transitions. Second operand 3 states. [2020-12-22 09:34:36,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:36,685 INFO L93 Difference]: Finished difference Result 878 states and 1619 transitions. [2020-12-22 09:34:36,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:34:36,686 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 09:34:36,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:36,691 INFO L225 Difference]: With dead ends: 878 [2020-12-22 09:34:36,692 INFO L226 Difference]: Without dead ends: 842 [2020-12-22 09:34:36,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:34:36,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2020-12-22 09:34:36,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 840. [2020-12-22 09:34:36,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 840 states. [2020-12-22 09:34:36,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1561 transitions. [2020-12-22 09:34:36,723 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1561 transitions. Word has length 41 [2020-12-22 09:34:36,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:36,723 INFO L481 AbstractCegarLoop]: Abstraction has 840 states and 1561 transitions. [2020-12-22 09:34:36,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:34:36,724 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1561 transitions. [2020-12-22 09:34:36,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:34:36,725 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:36,726 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:34:36,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:34:36,726 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:36,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:36,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1376027727, now seen corresponding path program 1 times [2020-12-22 09:34:36,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:36,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529823146] [2020-12-22 09:34:36,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:36,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:36,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:36,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529823146] [2020-12-22 09:34:36,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:36,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:36,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340987609] [2020-12-22 09:34:36,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:34:36,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:36,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:34:36,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:34:36,868 INFO L87 Difference]: Start difference. First operand 840 states and 1561 transitions. Second operand 5 states. [2020-12-22 09:34:37,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:37,029 INFO L93 Difference]: Finished difference Result 1224 states and 2161 transitions. [2020-12-22 09:34:37,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:34:37,030 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-12-22 09:34:37,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:37,037 INFO L225 Difference]: With dead ends: 1224 [2020-12-22 09:34:37,038 INFO L226 Difference]: Without dead ends: 1160 [2020-12-22 09:34:37,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:34:37,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2020-12-22 09:34:37,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 902. [2020-12-22 09:34:37,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 902 states. [2020-12-22 09:34:37,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1656 transitions. [2020-12-22 09:34:37,074 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1656 transitions. Word has length 41 [2020-12-22 09:34:37,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:37,075 INFO L481 AbstractCegarLoop]: Abstraction has 902 states and 1656 transitions. [2020-12-22 09:34:37,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:34:37,075 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1656 transitions. [2020-12-22 09:34:37,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:34:37,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:37,077 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:34:37,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:34:37,078 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:37,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:37,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1902982177, now seen corresponding path program 1 times [2020-12-22 09:34:37,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:37,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111794278] [2020-12-22 09:34:37,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:37,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:37,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:37,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111794278] [2020-12-22 09:34:37,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:37,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:34:37,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937136309] [2020-12-22 09:34:37,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:34:37,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:37,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:34:37,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:34:37,145 INFO L87 Difference]: Start difference. First operand 902 states and 1656 transitions. Second operand 3 states. [2020-12-22 09:34:37,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:37,207 INFO L93 Difference]: Finished difference Result 1089 states and 1943 transitions. [2020-12-22 09:34:37,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:34:37,210 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:34:37,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:37,216 INFO L225 Difference]: With dead ends: 1089 [2020-12-22 09:34:37,217 INFO L226 Difference]: Without dead ends: 963 [2020-12-22 09:34:37,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:34:37,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2020-12-22 09:34:37,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 961. [2020-12-22 09:34:37,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 961 states. [2020-12-22 09:34:37,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1744 transitions. [2020-12-22 09:34:37,260 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1744 transitions. Word has length 43 [2020-12-22 09:34:37,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:37,262 INFO L481 AbstractCegarLoop]: Abstraction has 961 states and 1744 transitions. [2020-12-22 09:34:37,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:34:37,262 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1744 transitions. [2020-12-22 09:34:37,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:34:37,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:37,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:34:37,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:34:37,270 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:37,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:37,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1836488665, now seen corresponding path program 1 times [2020-12-22 09:34:37,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:37,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662378787] [2020-12-22 09:34:37,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:37,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:37,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662378787] [2020-12-22 09:34:37,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:37,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:37,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841443666] [2020-12-22 09:34:37,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:34:37,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:37,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:34:37,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:34:37,476 INFO L87 Difference]: Start difference. First operand 961 states and 1744 transitions. Second operand 5 states. [2020-12-22 09:34:37,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:37,591 INFO L93 Difference]: Finished difference Result 1146 states and 2026 transitions. [2020-12-22 09:34:37,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:34:37,592 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-22 09:34:37,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:37,598 INFO L225 Difference]: With dead ends: 1146 [2020-12-22 09:34:37,598 INFO L226 Difference]: Without dead ends: 963 [2020-12-22 09:34:37,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:34:37,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2020-12-22 09:34:37,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 961. [2020-12-22 09:34:37,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 961 states. [2020-12-22 09:34:37,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1741 transitions. [2020-12-22 09:34:37,634 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1741 transitions. Word has length 43 [2020-12-22 09:34:37,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:37,634 INFO L481 AbstractCegarLoop]: Abstraction has 961 states and 1741 transitions. [2020-12-22 09:34:37,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:34:37,635 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1741 transitions. [2020-12-22 09:34:37,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:34:37,635 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:37,636 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:34:37,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:34:37,636 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:37,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:37,637 INFO L82 PathProgramCache]: Analyzing trace with hash -47574589, now seen corresponding path program 1 times [2020-12-22 09:34:37,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:37,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773373011] [2020-12-22 09:34:37,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:37,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:37,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:37,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773373011] [2020-12-22 09:34:37,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:37,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:34:37,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733572789] [2020-12-22 09:34:37,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:34:37,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:37,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:34:37,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:34:37,688 INFO L87 Difference]: Start difference. First operand 961 states and 1741 transitions. Second operand 3 states. [2020-12-22 09:34:37,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:37,734 INFO L93 Difference]: Finished difference Result 1291 states and 2237 transitions. [2020-12-22 09:34:37,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:34:37,735 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:34:37,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:37,742 INFO L225 Difference]: With dead ends: 1291 [2020-12-22 09:34:37,742 INFO L226 Difference]: Without dead ends: 1108 [2020-12-22 09:34:37,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:34:37,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2020-12-22 09:34:37,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1106. [2020-12-22 09:34:37,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1106 states. [2020-12-22 09:34:37,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 1952 transitions. [2020-12-22 09:34:37,786 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 1952 transitions. Word has length 43 [2020-12-22 09:34:37,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:37,787 INFO L481 AbstractCegarLoop]: Abstraction has 1106 states and 1952 transitions. [2020-12-22 09:34:37,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:34:37,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 1952 transitions. [2020-12-22 09:34:37,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:34:37,788 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:37,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:34:37,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:34:37,789 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:37,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:37,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1199933027, now seen corresponding path program 1 times [2020-12-22 09:34:37,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:37,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380820689] [2020-12-22 09:34:37,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:37,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:37,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380820689] [2020-12-22 09:34:37,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:37,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:34:37,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955012494] [2020-12-22 09:34:37,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:34:37,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:37,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:34:37,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:34:37,834 INFO L87 Difference]: Start difference. First operand 1106 states and 1952 transitions. Second operand 3 states. [2020-12-22 09:34:37,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:37,922 INFO L93 Difference]: Finished difference Result 1690 states and 2810 transitions. [2020-12-22 09:34:37,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:34:37,923 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:34:37,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:37,931 INFO L225 Difference]: With dead ends: 1690 [2020-12-22 09:34:37,931 INFO L226 Difference]: Without dead ends: 1362 [2020-12-22 09:34:37,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:34:37,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2020-12-22 09:34:37,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1360. [2020-12-22 09:34:37,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1360 states. [2020-12-22 09:34:37,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 2308 transitions. [2020-12-22 09:34:37,984 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 2308 transitions. Word has length 43 [2020-12-22 09:34:37,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:37,985 INFO L481 AbstractCegarLoop]: Abstraction has 1360 states and 2308 transitions. [2020-12-22 09:34:37,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:34:37,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 2308 transitions. [2020-12-22 09:34:37,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 09:34:37,986 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:37,987 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] [2020-12-22 09:34:37,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:34:37,987 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:37,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:37,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1511296967, now seen corresponding path program 1 times [2020-12-22 09:34:37,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:37,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140671073] [2020-12-22 09:34:37,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:38,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:38,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:38,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140671073] [2020-12-22 09:34:38,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:38,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:38,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189961815] [2020-12-22 09:34:38,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:34:38,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:38,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:34:38,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:34:38,105 INFO L87 Difference]: Start difference. First operand 1360 states and 2308 transitions. Second operand 5 states. [2020-12-22 09:34:38,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:38,233 INFO L93 Difference]: Finished difference Result 1883 states and 3036 transitions. [2020-12-22 09:34:38,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:34:38,234 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-12-22 09:34:38,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:38,244 INFO L225 Difference]: With dead ends: 1883 [2020-12-22 09:34:38,244 INFO L226 Difference]: Without dead ends: 1881 [2020-12-22 09:34:38,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:34:38,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2020-12-22 09:34:38,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1408. [2020-12-22 09:34:38,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1408 states. [2020-12-22 09:34:38,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 2352 transitions. [2020-12-22 09:34:38,311 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 2352 transitions. Word has length 44 [2020-12-22 09:34:38,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:38,311 INFO L481 AbstractCegarLoop]: Abstraction has 1408 states and 2352 transitions. [2020-12-22 09:34:38,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:34:38,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 2352 transitions. [2020-12-22 09:34:38,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:34:38,313 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:38,313 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:34:38,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:34:38,313 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:38,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:38,314 INFO L82 PathProgramCache]: Analyzing trace with hash -523945775, now seen corresponding path program 1 times [2020-12-22 09:34:38,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:38,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462874922] [2020-12-22 09:34:38,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:38,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:38,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:38,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462874922] [2020-12-22 09:34:38,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:38,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:34:38,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174321534] [2020-12-22 09:34:38,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:34:38,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:38,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:34:38,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:34:38,410 INFO L87 Difference]: Start difference. First operand 1408 states and 2352 transitions. Second operand 3 states. [2020-12-22 09:34:44,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:44,625 INFO L93 Difference]: Finished difference Result 2912 states and 5225 transitions. [2020-12-22 09:34:44,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:34:44,631 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 09:34:44,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:44,642 INFO L225 Difference]: With dead ends: 2912 [2020-12-22 09:34:44,643 INFO L226 Difference]: Without dead ends: 2159 [2020-12-22 09:34:44,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:34:44,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2159 states. [2020-12-22 09:34:44,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2159 to 2159. [2020-12-22 09:34:44,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2159 states. [2020-12-22 09:34:44,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 3331 transitions. [2020-12-22 09:34:44,745 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 3331 transitions. Word has length 63 [2020-12-22 09:34:44,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:44,747 INFO L481 AbstractCegarLoop]: Abstraction has 2159 states and 3331 transitions. [2020-12-22 09:34:44,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:34:44,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 3331 transitions. [2020-12-22 09:34:44,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:34:44,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:44,749 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:34:44,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:34:44,749 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:44,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:44,750 INFO L82 PathProgramCache]: Analyzing trace with hash -213997176, now seen corresponding path program 1 times [2020-12-22 09:34:44,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:44,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401721857] [2020-12-22 09:34:44,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:44,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:44,857 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:34:44,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401721857] [2020-12-22 09:34:44,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:44,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:44,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805394909] [2020-12-22 09:34:44,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:34:44,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:44,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:34:44,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:34:44,861 INFO L87 Difference]: Start difference. First operand 2159 states and 3331 transitions. Second operand 5 states. [2020-12-22 09:34:45,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:45,093 INFO L93 Difference]: Finished difference Result 4187 states and 6179 transitions. [2020-12-22 09:34:45,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:34:45,094 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 09:34:45,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:45,155 INFO L225 Difference]: With dead ends: 4187 [2020-12-22 09:34:45,155 INFO L226 Difference]: Without dead ends: 3557 [2020-12-22 09:34:45,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:34:45,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2020-12-22 09:34:45,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 2787. [2020-12-22 09:34:45,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2787 states. [2020-12-22 09:34:45,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 4207 transitions. [2020-12-22 09:34:45,307 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 4207 transitions. Word has length 64 [2020-12-22 09:34:45,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:45,308 INFO L481 AbstractCegarLoop]: Abstraction has 2787 states and 4207 transitions. [2020-12-22 09:34:45,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:34:45,308 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 4207 transitions. [2020-12-22 09:34:45,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:34:45,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:45,311 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:34:45,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:34:45,311 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:45,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:45,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1033510440, now seen corresponding path program 1 times [2020-12-22 09:34:45,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:45,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063014421] [2020-12-22 09:34:45,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:45,416 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:34:45,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063014421] [2020-12-22 09:34:45,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:45,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:45,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860406552] [2020-12-22 09:34:45,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:34:45,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:45,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:34:45,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:34:45,419 INFO L87 Difference]: Start difference. First operand 2787 states and 4207 transitions. Second operand 5 states. [2020-12-22 09:34:45,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:45,709 INFO L93 Difference]: Finished difference Result 4815 states and 7055 transitions. [2020-12-22 09:34:45,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:34:45,710 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 09:34:45,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:45,736 INFO L225 Difference]: With dead ends: 4815 [2020-12-22 09:34:45,737 INFO L226 Difference]: Without dead ends: 4185 [2020-12-22 09:34:45,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:34:45,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4185 states. [2020-12-22 09:34:45,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4185 to 3731. [2020-12-22 09:34:45,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3731 states. [2020-12-22 09:34:45,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3731 states to 3731 states and 5511 transitions. [2020-12-22 09:34:45,978 INFO L78 Accepts]: Start accepts. Automaton has 3731 states and 5511 transitions. Word has length 64 [2020-12-22 09:34:45,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:45,978 INFO L481 AbstractCegarLoop]: Abstraction has 3731 states and 5511 transitions. [2020-12-22 09:34:45,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:34:45,978 INFO L276 IsEmpty]: Start isEmpty. Operand 3731 states and 5511 transitions. [2020-12-22 09:34:45,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:34:45,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:45,981 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:34:45,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:34:45,981 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:45,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:45,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1792023874, now seen corresponding path program 1 times [2020-12-22 09:34:45,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:45,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291628786] [2020-12-22 09:34:45,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:46,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:46,079 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:34:46,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291628786] [2020-12-22 09:34:46,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:46,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:46,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943412921] [2020-12-22 09:34:46,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:34:46,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:46,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:34:46,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:34:46,087 INFO L87 Difference]: Start difference. First operand 3731 states and 5511 transitions. Second operand 5 states. [2020-12-22 09:34:46,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:46,380 INFO L93 Difference]: Finished difference Result 5083 states and 7435 transitions. [2020-12-22 09:34:46,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:34:46,380 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 09:34:46,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:46,431 INFO L225 Difference]: With dead ends: 5083 [2020-12-22 09:34:46,431 INFO L226 Difference]: Without dead ends: 4633 [2020-12-22 09:34:46,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:34:46,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4633 states. [2020-12-22 09:34:46,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4633 to 4179. [2020-12-22 09:34:46,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4179 states. [2020-12-22 09:34:46,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4179 states to 4179 states and 6143 transitions. [2020-12-22 09:34:46,651 INFO L78 Accepts]: Start accepts. Automaton has 4179 states and 6143 transitions. Word has length 64 [2020-12-22 09:34:46,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:46,651 INFO L481 AbstractCegarLoop]: Abstraction has 4179 states and 6143 transitions. [2020-12-22 09:34:46,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:34:46,653 INFO L276 IsEmpty]: Start isEmpty. Operand 4179 states and 6143 transitions. [2020-12-22 09:34:46,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:34:46,662 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:46,663 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] [2020-12-22 09:34:46,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:34:46,663 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:46,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:46,664 INFO L82 PathProgramCache]: Analyzing trace with hash 322769619, now seen corresponding path program 1 times [2020-12-22 09:34:46,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:46,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809653813] [2020-12-22 09:34:46,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:46,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:46,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809653813] [2020-12-22 09:34:46,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:46,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:34:46,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379765634] [2020-12-22 09:34:46,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:34:46,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:46,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:34:46,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:34:46,733 INFO L87 Difference]: Start difference. First operand 4179 states and 6143 transitions. Second operand 3 states. [2020-12-22 09:34:46,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:46,929 INFO L93 Difference]: Finished difference Result 6831 states and 9845 transitions. [2020-12-22 09:34:46,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:34:46,929 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 09:34:46,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:46,940 INFO L225 Difference]: With dead ends: 6831 [2020-12-22 09:34:46,941 INFO L226 Difference]: Without dead ends: 4181 [2020-12-22 09:34:46,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:34:46,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2020-12-22 09:34:47,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 4179. [2020-12-22 09:34:47,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4179 states. [2020-12-22 09:34:47,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4179 states to 4179 states and 6093 transitions. [2020-12-22 09:34:47,182 INFO L78 Accepts]: Start accepts. Automaton has 4179 states and 6093 transitions. Word has length 65 [2020-12-22 09:34:47,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:47,183 INFO L481 AbstractCegarLoop]: Abstraction has 4179 states and 6093 transitions. [2020-12-22 09:34:47,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:34:47,183 INFO L276 IsEmpty]: Start isEmpty. Operand 4179 states and 6093 transitions. [2020-12-22 09:34:47,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:34:47,185 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:47,185 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:34:47,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:34:47,185 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:47,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:47,186 INFO L82 PathProgramCache]: Analyzing trace with hash 235650825, now seen corresponding path program 1 times [2020-12-22 09:34:47,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:47,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944322455] [2020-12-22 09:34:47,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:47,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:47,241 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:47,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944322455] [2020-12-22 09:34:47,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:47,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:34:47,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280502283] [2020-12-22 09:34:47,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:34:47,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:47,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:34:47,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:34:47,244 INFO L87 Difference]: Start difference. First operand 4179 states and 6093 transitions. Second operand 3 states. [2020-12-22 09:34:47,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:47,354 INFO L93 Difference]: Finished difference Result 5507 states and 7920 transitions. [2020-12-22 09:34:47,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:34:47,355 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 09:34:47,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:47,362 INFO L225 Difference]: With dead ends: 5507 [2020-12-22 09:34:47,362 INFO L226 Difference]: Without dead ends: 2857 [2020-12-22 09:34:47,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:34:47,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2857 states. [2020-12-22 09:34:47,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2857 to 2855. [2020-12-22 09:34:47,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2855 states. [2020-12-22 09:34:47,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2855 states to 2855 states and 4243 transitions. [2020-12-22 09:34:47,477 INFO L78 Accepts]: Start accepts. Automaton has 2855 states and 4243 transitions. Word has length 65 [2020-12-22 09:34:47,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:47,477 INFO L481 AbstractCegarLoop]: Abstraction has 2855 states and 4243 transitions. [2020-12-22 09:34:47,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:34:47,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2855 states and 4243 transitions. [2020-12-22 09:34:47,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:34:47,479 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:47,479 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:34:47,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:34:47,479 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:47,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:47,480 INFO L82 PathProgramCache]: Analyzing trace with hash -883624385, now seen corresponding path program 1 times [2020-12-22 09:34:47,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:47,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232279202] [2020-12-22 09:34:47,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:47,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:47,668 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:34:47,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232279202] [2020-12-22 09:34:47,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792363108] [2020-12-22 09:34:47,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:34:47,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:47,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 09:34:47,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:34:48,029 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:34:48,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:34:48,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9] total 10 [2020-12-22 09:34:48,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413793630] [2020-12-22 09:34:48,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 09:34:48,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:48,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 09:34:48,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:34:48,032 INFO L87 Difference]: Start difference. First operand 2855 states and 4243 transitions. Second operand 10 states. [2020-12-22 09:34:48,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:48,379 INFO L93 Difference]: Finished difference Result 4704 states and 6780 transitions. [2020-12-22 09:34:48,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:34:48,380 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-12-22 09:34:48,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:48,388 INFO L225 Difference]: With dead ends: 4704 [2020-12-22 09:34:48,389 INFO L226 Difference]: Without dead ends: 3694 [2020-12-22 09:34:48,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-12-22 09:34:48,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2020-12-22 09:34:48,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 3661. [2020-12-22 09:34:48,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3661 states. [2020-12-22 09:34:48,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3661 states to 3661 states and 5299 transitions. [2020-12-22 09:34:48,587 INFO L78 Accepts]: Start accepts. Automaton has 3661 states and 5299 transitions. Word has length 65 [2020-12-22 09:34:48,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:48,588 INFO L481 AbstractCegarLoop]: Abstraction has 3661 states and 5299 transitions. [2020-12-22 09:34:48,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 09:34:48,588 INFO L276 IsEmpty]: Start isEmpty. Operand 3661 states and 5299 transitions. [2020-12-22 09:34:48,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:34:48,589 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:48,589 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:34:48,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 09:34:48,802 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:48,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:48,804 INFO L82 PathProgramCache]: Analyzing trace with hash 752221610, now seen corresponding path program 1 times [2020-12-22 09:34:48,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:48,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873002195] [2020-12-22 09:34:48,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:49,081 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:49,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873002195] [2020-12-22 09:34:49,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362720973] [2020-12-22 09:34:49,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:34:49,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:49,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 09:34:49,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:34:49,421 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:34:49,759 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:49,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:34:49,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:34:49,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996571760] [2020-12-22 09:34:49,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:34:49,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:49,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:34:49,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:34:49,763 INFO L87 Difference]: Start difference. First operand 3661 states and 5299 transitions. Second operand 17 states. [2020-12-22 09:34:51,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:51,814 INFO L93 Difference]: Finished difference Result 10680 states and 14569 transitions. [2020-12-22 09:34:51,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 09:34:51,814 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-12-22 09:34:51,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:51,833 INFO L225 Difference]: With dead ends: 10680 [2020-12-22 09:34:51,833 INFO L226 Difference]: Without dead ends: 9189 [2020-12-22 09:34:51,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 09:34:51,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9189 states. [2020-12-22 09:34:52,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9189 to 6136. [2020-12-22 09:34:52,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6136 states. [2020-12-22 09:34:52,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6136 states to 6136 states and 8577 transitions. [2020-12-22 09:34:52,274 INFO L78 Accepts]: Start accepts. Automaton has 6136 states and 8577 transitions. Word has length 66 [2020-12-22 09:34:52,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:52,274 INFO L481 AbstractCegarLoop]: Abstraction has 6136 states and 8577 transitions. [2020-12-22 09:34:52,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:34:52,275 INFO L276 IsEmpty]: Start isEmpty. Operand 6136 states and 8577 transitions. [2020-12-22 09:34:52,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:34:52,276 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:52,276 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:34:52,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 09:34:52,491 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:52,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:52,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1910012548, now seen corresponding path program 1 times [2020-12-22 09:34:52,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:52,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125952070] [2020-12-22 09:34:52,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:52,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:52,693 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:52,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125952070] [2020-12-22 09:34:52,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037022600] [2020-12-22 09:34:52,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:34:52,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:52,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:34:52,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:34:52,955 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:34:53,241 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:53,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:34:53,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:34:53,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463543376] [2020-12-22 09:34:53,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:34:53,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:53,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:34:53,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:34:53,244 INFO L87 Difference]: Start difference. First operand 6136 states and 8577 transitions. Second operand 17 states. [2020-12-22 09:34:55,048 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2020-12-22 09:34:55,596 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 09:34:56,275 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:34:58,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:58,216 INFO L93 Difference]: Finished difference Result 29250 states and 39149 transitions. [2020-12-22 09:34:58,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 09:34:58,217 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-12-22 09:34:58,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:58,270 INFO L225 Difference]: With dead ends: 29250 [2020-12-22 09:34:58,270 INFO L226 Difference]: Without dead ends: 24643 [2020-12-22 09:34:58,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 09:34:58,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24643 states. [2020-12-22 09:34:59,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24643 to 11635. [2020-12-22 09:34:59,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11635 states. [2020-12-22 09:34:59,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11635 states to 11635 states and 15704 transitions. [2020-12-22 09:34:59,492 INFO L78 Accepts]: Start accepts. Automaton has 11635 states and 15704 transitions. Word has length 66 [2020-12-22 09:34:59,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:59,492 INFO L481 AbstractCegarLoop]: Abstraction has 11635 states and 15704 transitions. [2020-12-22 09:34:59,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:34:59,493 INFO L276 IsEmpty]: Start isEmpty. Operand 11635 states and 15704 transitions. [2020-12-22 09:34:59,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:34:59,494 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:59,494 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:34:59,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 09:34:59,710 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:59,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:59,712 INFO L82 PathProgramCache]: Analyzing trace with hash 616171932, now seen corresponding path program 1 times [2020-12-22 09:34:59,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:59,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335915508] [2020-12-22 09:34:59,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:59,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:59,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335915508] [2020-12-22 09:34:59,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232151431] [2020-12-22 09:34:59,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:35:00,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:00,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 09:35:00,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:35:00,203 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:35:00,560 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:35:00,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:35:00,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:35:00,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233779177] [2020-12-22 09:35:00,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:35:00,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:35:00,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:35:00,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:35:00,565 INFO L87 Difference]: Start difference. First operand 11635 states and 15704 transitions. Second operand 17 states. [2020-12-22 09:35:04,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:35:04,927 INFO L93 Difference]: Finished difference Result 54429 states and 71040 transitions. [2020-12-22 09:35:04,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:35:04,928 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-12-22 09:35:04,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:35:05,027 INFO L225 Difference]: With dead ends: 54429 [2020-12-22 09:35:05,028 INFO L226 Difference]: Without dead ends: 44323 [2020-12-22 09:35:05,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:35:05,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44323 states. [2020-12-22 09:35:07,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44323 to 29071. [2020-12-22 09:35:07,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29071 states. [2020-12-22 09:35:07,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29071 states to 29071 states and 38132 transitions. [2020-12-22 09:35:07,580 INFO L78 Accepts]: Start accepts. Automaton has 29071 states and 38132 transitions. Word has length 66 [2020-12-22 09:35:07,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:35:07,580 INFO L481 AbstractCegarLoop]: Abstraction has 29071 states and 38132 transitions. [2020-12-22 09:35:07,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:35:07,580 INFO L276 IsEmpty]: Start isEmpty. Operand 29071 states and 38132 transitions. [2020-12-22 09:35:07,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:35:07,583 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:35:07,583 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:35:07,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:35:07,797 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:35:07,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:35:07,798 INFO L82 PathProgramCache]: Analyzing trace with hash -434236462, now seen corresponding path program 1 times [2020-12-22 09:35:07,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:35:07,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606893972] [2020-12-22 09:35:07,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:35:07,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:35:07,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606893972] [2020-12-22 09:35:07,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:35:07,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:35:07,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795576027] [2020-12-22 09:35:07,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:35:07,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:35:07,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:35:07,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:35:07,857 INFO L87 Difference]: Start difference. First operand 29071 states and 38132 transitions. Second operand 3 states. [2020-12-22 09:35:08,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:35:08,857 INFO L93 Difference]: Finished difference Result 41067 states and 53662 transitions. [2020-12-22 09:35:08,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:35:08,857 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:35:08,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:35:08,886 INFO L225 Difference]: With dead ends: 41067 [2020-12-22 09:35:08,887 INFO L226 Difference]: Without dead ends: 13525 [2020-12-22 09:35:08,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:35:08,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13525 states. [2020-12-22 09:35:09,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13525 to 12473. [2020-12-22 09:35:09,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12473 states. [2020-12-22 09:35:10,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12473 states to 12473 states and 16421 transitions. [2020-12-22 09:35:10,011 INFO L78 Accepts]: Start accepts. Automaton has 12473 states and 16421 transitions. Word has length 66 [2020-12-22 09:35:10,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:35:10,011 INFO L481 AbstractCegarLoop]: Abstraction has 12473 states and 16421 transitions. [2020-12-22 09:35:10,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:35:10,012 INFO L276 IsEmpty]: Start isEmpty. Operand 12473 states and 16421 transitions. [2020-12-22 09:35:10,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:35:10,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:35:10,014 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:35:10,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:35:10,014 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:35:10,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:35:10,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1433407838, now seen corresponding path program 1 times [2020-12-22 09:35:10,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:35:10,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607143309] [2020-12-22 09:35:10,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:35:10,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:10,086 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:35:10,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607143309] [2020-12-22 09:35:10,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:35:10,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:35:10,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638020828] [2020-12-22 09:35:10,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:35:10,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:35:10,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:35:10,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:35:10,092 INFO L87 Difference]: Start difference. First operand 12473 states and 16421 transitions. Second operand 6 states. [2020-12-22 09:35:11,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:35:11,165 INFO L93 Difference]: Finished difference Result 21538 states and 28068 transitions. [2020-12-22 09:35:11,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:35:11,166 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 09:35:11,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:35:11,182 INFO L225 Difference]: With dead ends: 21538 [2020-12-22 09:35:11,182 INFO L226 Difference]: Without dead ends: 10671 [2020-12-22 09:35:11,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:35:11,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10671 states. [2020-12-22 09:35:12,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10671 to 10671. [2020-12-22 09:35:12,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10671 states. [2020-12-22 09:35:12,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10671 states to 10671 states and 13899 transitions. [2020-12-22 09:35:12,258 INFO L78 Accepts]: Start accepts. Automaton has 10671 states and 13899 transitions. Word has length 66 [2020-12-22 09:35:12,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:35:12,258 INFO L481 AbstractCegarLoop]: Abstraction has 10671 states and 13899 transitions. [2020-12-22 09:35:12,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:35:12,259 INFO L276 IsEmpty]: Start isEmpty. Operand 10671 states and 13899 transitions. [2020-12-22 09:35:12,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:35:12,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:35:12,261 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:35:12,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:35:12,262 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:35:12,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:35:12,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1275703454, now seen corresponding path program 1 times [2020-12-22 09:35:12,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:35:12,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715253139] [2020-12-22 09:35:12,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:35:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:12,344 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 09:35:12,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715253139] [2020-12-22 09:35:12,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:35:12,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:35:12,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960620857] [2020-12-22 09:35:12,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:35:12,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:35:12,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:35:12,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:35:12,347 INFO L87 Difference]: Start difference. First operand 10671 states and 13899 transitions. Second operand 6 states. [2020-12-22 09:35:13,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:35:13,188 INFO L93 Difference]: Finished difference Result 17448 states and 22435 transitions. [2020-12-22 09:35:13,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:35:13,192 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 09:35:13,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:35:13,204 INFO L225 Difference]: With dead ends: 17448 [2020-12-22 09:35:13,205 INFO L226 Difference]: Without dead ends: 8419 [2020-12-22 09:35:13,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:35:13,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8419 states. [2020-12-22 09:35:14,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8419 to 8419. [2020-12-22 09:35:14,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8419 states. [2020-12-22 09:35:14,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8419 states to 8419 states and 10931 transitions. [2020-12-22 09:35:14,013 INFO L78 Accepts]: Start accepts. Automaton has 8419 states and 10931 transitions. Word has length 66 [2020-12-22 09:35:14,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:35:14,014 INFO L481 AbstractCegarLoop]: Abstraction has 8419 states and 10931 transitions. [2020-12-22 09:35:14,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:35:14,014 INFO L276 IsEmpty]: Start isEmpty. Operand 8419 states and 10931 transitions. [2020-12-22 09:35:14,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:35:14,016 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:35:14,016 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:35:14,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:35:14,017 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:35:14,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:35:14,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1486365826, now seen corresponding path program 1 times [2020-12-22 09:35:14,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:35:14,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237199370] [2020-12-22 09:35:14,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:35:14,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:14,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:35:14,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237199370] [2020-12-22 09:35:14,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:35:14,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:35:14,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022544289] [2020-12-22 09:35:14,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:35:14,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:35:14,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:35:14,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:35:14,086 INFO L87 Difference]: Start difference. First operand 8419 states and 10931 transitions. Second operand 6 states. [2020-12-22 09:35:14,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:35:14,645 INFO L93 Difference]: Finished difference Result 13769 states and 17588 transitions. [2020-12-22 09:35:14,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:35:14,645 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 09:35:14,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:35:14,653 INFO L225 Difference]: With dead ends: 13769 [2020-12-22 09:35:14,653 INFO L226 Difference]: Without dead ends: 6915 [2020-12-22 09:35:14,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:35:14,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6915 states. [2020-12-22 09:35:15,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6915 to 6915. [2020-12-22 09:35:15,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6915 states. [2020-12-22 09:35:15,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6915 states to 6915 states and 9025 transitions. [2020-12-22 09:35:15,132 INFO L78 Accepts]: Start accepts. Automaton has 6915 states and 9025 transitions. Word has length 66 [2020-12-22 09:35:15,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:35:15,133 INFO L481 AbstractCegarLoop]: Abstraction has 6915 states and 9025 transitions. [2020-12-22 09:35:15,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:35:15,133 INFO L276 IsEmpty]: Start isEmpty. Operand 6915 states and 9025 transitions. [2020-12-22 09:35:15,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:35:15,134 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:35:15,134 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:35:15,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:35:15,134 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:35:15,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:35:15,135 INFO L82 PathProgramCache]: Analyzing trace with hash -791645332, now seen corresponding path program 1 times [2020-12-22 09:35:15,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:35:15,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415816113] [2020-12-22 09:35:15,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:35:15,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:15,719 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:35:15,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415816113] [2020-12-22 09:35:15,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105448865] [2020-12-22 09:35:15,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:35:15,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:15,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 09:35:15,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:35:16,726 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:35:16,744 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:35:16,746 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:35:16,752 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:35:17,040 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 28 [2020-12-22 09:35:17,299 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:35:17,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:35:17,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2020-12-22 09:35:17,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336076653] [2020-12-22 09:35:17,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 09:35:17,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:35:17,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 09:35:17,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2020-12-22 09:35:17,302 INFO L87 Difference]: Start difference. First operand 6915 states and 9025 transitions. Second operand 26 states. [2020-12-22 09:35:18,229 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2020-12-22 09:35:18,453 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-12-22 09:35:18,790 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2020-12-22 09:35:19,078 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-22 09:35:19,365 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-22 09:35:19,663 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-22 09:35:19,967 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-22 09:35:20,335 WARN L197 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2020-12-22 09:35:20,752 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-12-22 09:35:21,005 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-22 09:35:21,205 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:35:21,425 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-12-22 09:35:22,023 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-12-22 09:35:22,509 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-12-22 09:35:22,735 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-12-22 09:35:23,104 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 09:35:23,492 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-12-22 09:35:23,866 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-12-22 09:35:24,046 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-12-22 09:35:24,227 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-12-22 09:35:24,564 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-12-22 09:35:24,977 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:35:25,372 WARN L197 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-12-22 09:35:25,850 WARN L197 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-12-22 09:35:26,216 WARN L197 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-12-22 09:35:26,484 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-12-22 09:35:26,831 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-12-22 09:35:27,087 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-22 09:35:27,351 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-12-22 09:35:27,672 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2020-12-22 09:35:27,879 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-12-22 09:35:28,361 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2020-12-22 09:35:30,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:35:30,741 INFO L93 Difference]: Finished difference Result 13221 states and 16860 transitions. [2020-12-22 09:35:30,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-22 09:35:30,742 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 67 [2020-12-22 09:35:30,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:35:30,759 INFO L225 Difference]: With dead ends: 13221 [2020-12-22 09:35:30,759 INFO L226 Difference]: Without dead ends: 10406 [2020-12-22 09:35:30,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2087 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=1298, Invalid=6358, Unknown=0, NotChecked=0, Total=7656 [2020-12-22 09:35:30,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10406 states. [2020-12-22 09:35:31,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10406 to 6157. [2020-12-22 09:35:31,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6157 states. [2020-12-22 09:35:31,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6157 states to 6157 states and 8140 transitions. [2020-12-22 09:35:31,291 INFO L78 Accepts]: Start accepts. Automaton has 6157 states and 8140 transitions. Word has length 67 [2020-12-22 09:35:31,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:35:31,291 INFO L481 AbstractCegarLoop]: Abstraction has 6157 states and 8140 transitions. [2020-12-22 09:35:31,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 09:35:31,291 INFO L276 IsEmpty]: Start isEmpty. Operand 6157 states and 8140 transitions. [2020-12-22 09:35:31,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:35:31,292 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:35:31,292 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:35:31,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 09:35:31,508 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:35:31,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:35:31,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1641009586, now seen corresponding path program 1 times [2020-12-22 09:35:31,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:35:31,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699892290] [2020-12-22 09:35:31,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:35:31,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:32,003 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:35:32,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699892290] [2020-12-22 09:35:32,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006832860] [2020-12-22 09:35:32,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:35:32,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:32,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 09:35:32,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:35:32,428 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:35:33,069 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:35:33,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:35:33,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2020-12-22 09:35:33,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724032138] [2020-12-22 09:35:33,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 09:35:33,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:35:33,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 09:35:33,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:35:33,071 INFO L87 Difference]: Start difference. First operand 6157 states and 8140 transitions. Second operand 22 states. [2020-12-22 09:35:33,419 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 21 [2020-12-22 09:35:33,602 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-12-22 09:35:33,810 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-12-22 09:35:33,975 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2020-12-22 09:35:34,836 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2020-12-22 09:35:35,127 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-12-22 09:35:35,332 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 30 [2020-12-22 09:35:35,589 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-12-22 09:35:36,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:35:36,448 INFO L93 Difference]: Finished difference Result 9399 states and 12233 transitions. [2020-12-22 09:35:36,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 09:35:36,449 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-12-22 09:35:36,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:35:36,457 INFO L225 Difference]: With dead ends: 9399 [2020-12-22 09:35:36,458 INFO L226 Difference]: Without dead ends: 7213 [2020-12-22 09:35:36,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=275, Invalid=985, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:35:36,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7213 states. [2020-12-22 09:35:36,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7213 to 5165. [2020-12-22 09:35:36,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5165 states. [2020-12-22 09:35:36,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5165 states to 5165 states and 6914 transitions. [2020-12-22 09:35:36,894 INFO L78 Accepts]: Start accepts. Automaton has 5165 states and 6914 transitions. Word has length 67 [2020-12-22 09:35:36,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:35:36,894 INFO L481 AbstractCegarLoop]: Abstraction has 5165 states and 6914 transitions. [2020-12-22 09:35:36,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 09:35:36,895 INFO L276 IsEmpty]: Start isEmpty. Operand 5165 states and 6914 transitions. [2020-12-22 09:35:36,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:35:36,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:35:36,896 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:35:37,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:35:37,111 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:35:37,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:35:37,113 INFO L82 PathProgramCache]: Analyzing trace with hash -2141886399, now seen corresponding path program 1 times [2020-12-22 09:35:37,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:35:37,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157008719] [2020-12-22 09:35:37,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:35:37,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:37,522 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:35:37,788 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:35:37,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157008719] [2020-12-22 09:35:37,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137926482] [2020-12-22 09:35:37,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:35:37,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:37,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 09:35:37,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:35:39,198 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2020-12-22 09:35:39,539 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2020-12-22 09:35:40,024 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2020-12-22 09:35:40,110 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:35:40,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:35:40,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2020-12-22 09:35:40,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169771901] [2020-12-22 09:35:40,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 09:35:40,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:35:40,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 09:35:40,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2020-12-22 09:35:40,113 INFO L87 Difference]: Start difference. First operand 5165 states and 6914 transitions. Second operand 32 states. [2020-12-22 09:35:41,405 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 09:35:41,576 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2020-12-22 09:35:43,173 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-12-22 09:35:43,574 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-12-22 09:35:45,673 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:35:46,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:35:46,489 INFO L93 Difference]: Finished difference Result 8559 states and 11215 transitions. [2020-12-22 09:35:46,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 09:35:46,490 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 68 [2020-12-22 09:35:46,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:35:46,499 INFO L225 Difference]: With dead ends: 8559 [2020-12-22 09:35:46,500 INFO L226 Difference]: Without dead ends: 6639 [2020-12-22 09:35:46,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1070, Invalid=4042, Unknown=0, NotChecked=0, Total=5112 [2020-12-22 09:35:46,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6639 states. [2020-12-22 09:35:46,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6639 to 4215. [2020-12-22 09:35:46,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4215 states. [2020-12-22 09:35:46,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4215 states to 4215 states and 5750 transitions. [2020-12-22 09:35:46,861 INFO L78 Accepts]: Start accepts. Automaton has 4215 states and 5750 transitions. Word has length 68 [2020-12-22 09:35:46,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:35:46,861 INFO L481 AbstractCegarLoop]: Abstraction has 4215 states and 5750 transitions. [2020-12-22 09:35:46,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 09:35:46,862 INFO L276 IsEmpty]: Start isEmpty. Operand 4215 states and 5750 transitions. [2020-12-22 09:35:46,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 09:35:46,865 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:35:46,865 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2020-12-22 09:35:47,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 09:35:47,074 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:35:47,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:35:47,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1538014726, now seen corresponding path program 1 times [2020-12-22 09:35:47,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:35:47,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705163176] [2020-12-22 09:35:47,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:35:47,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:47,597 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 22 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:35:47,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705163176] [2020-12-22 09:35:47,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798546532] [2020-12-22 09:35:47,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:35:47,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:47,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 09:35:47,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:35:48,517 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:35:49,060 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 42 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:35:49,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:35:49,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2020-12-22 09:35:49,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730961692] [2020-12-22 09:35:49,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 09:35:49,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:35:49,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 09:35:49,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-12-22 09:35:49,063 INFO L87 Difference]: Start difference. First operand 4215 states and 5750 transitions. Second operand 23 states. [2020-12-22 09:35:49,559 WARN L197 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2020-12-22 09:35:50,363 WARN L197 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-12-22 09:35:50,880 WARN L197 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2020-12-22 09:35:51,376 WARN L197 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2020-12-22 09:35:51,851 WARN L197 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2020-12-22 09:35:52,502 WARN L197 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2020-12-22 09:35:53,197 WARN L197 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2020-12-22 09:35:54,109 WARN L197 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2020-12-22 09:35:54,898 WARN L197 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2020-12-22 09:35:56,007 WARN L197 SmtUtils]: Spent 771.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 91 [2020-12-22 09:35:56,857 WARN L197 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 88 [2020-12-22 09:35:57,601 WARN L197 SmtUtils]: Spent 676.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 86 [2020-12-22 09:35:58,476 WARN L197 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2020-12-22 09:35:59,221 WARN L197 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 83 [2020-12-22 09:36:00,230 WARN L197 SmtUtils]: Spent 915.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 91 [2020-12-22 09:36:01,483 WARN L197 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 116 DAG size of output: 99 [2020-12-22 09:36:02,760 WARN L197 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 116 DAG size of output: 99 [2020-12-22 09:36:04,096 WARN L197 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 116 DAG size of output: 99 [2020-12-22 09:36:05,756 WARN L197 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 116 DAG size of output: 99 [2020-12-22 09:36:06,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:36:06,576 INFO L93 Difference]: Finished difference Result 6589 states and 8737 transitions. [2020-12-22 09:36:06,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 09:36:06,579 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 110 [2020-12-22 09:36:06,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:36:06,587 INFO L225 Difference]: With dead ends: 6589 [2020-12-22 09:36:06,587 INFO L226 Difference]: Without dead ends: 4433 [2020-12-22 09:36:06,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=471, Invalid=1599, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 09:36:06,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4433 states. [2020-12-22 09:36:07,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4433 to 4215. [2020-12-22 09:36:07,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4215 states. [2020-12-22 09:36:07,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4215 states to 4215 states and 5698 transitions. [2020-12-22 09:36:07,210 INFO L78 Accepts]: Start accepts. Automaton has 4215 states and 5698 transitions. Word has length 110 [2020-12-22 09:36:07,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:36:07,211 INFO L481 AbstractCegarLoop]: Abstraction has 4215 states and 5698 transitions. [2020-12-22 09:36:07,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 09:36:07,211 INFO L276 IsEmpty]: Start isEmpty. Operand 4215 states and 5698 transitions. [2020-12-22 09:36:07,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 09:36:07,213 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:36:07,213 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 09:36:07,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 09:36:07,415 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:36:07,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:36:07,416 INFO L82 PathProgramCache]: Analyzing trace with hash -721276639, now seen corresponding path program 1 times [2020-12-22 09:36:07,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:36:07,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082741881] [2020-12-22 09:36:07,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:36:07,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:36:07,874 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 18 [2020-12-22 09:36:07,983 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 25 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:36:07,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082741881] [2020-12-22 09:36:07,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690814204] [2020-12-22 09:36:07,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:36:08,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:36:08,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 09:36:08,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:36:08,817 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:36:09,816 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:36:10,237 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 34 [2020-12-22 09:36:10,529 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2020-12-22 09:36:11,444 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 27 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:36:11,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:36:11,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19] total 29 [2020-12-22 09:36:11,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291754341] [2020-12-22 09:36:11,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 09:36:11,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:36:11,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 09:36:11,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2020-12-22 09:36:11,447 INFO L87 Difference]: Start difference. First operand 4215 states and 5698 transitions. Second operand 30 states. [2020-12-22 09:36:11,647 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 09:36:12,247 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-22 09:36:12,511 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-22 09:36:13,141 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:36:13,466 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-12-22 09:36:13,910 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-22 09:36:14,207 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-22 09:36:14,585 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-12-22 09:36:15,034 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2020-12-22 09:36:15,201 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2020-12-22 09:36:15,525 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2020-12-22 09:36:15,866 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-12-22 09:36:16,209 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-12-22 09:36:16,791 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-12-22 09:36:17,280 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2020-12-22 09:36:17,659 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-12-22 09:36:17,919 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2020-12-22 09:36:18,369 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-12-22 09:36:18,857 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2020-12-22 09:36:19,461 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-12-22 09:36:20,030 WARN L197 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-12-22 09:36:20,243 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2020-12-22 09:36:20,544 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-12-22 09:36:20,845 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-22 09:36:21,282 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-12-22 09:36:21,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:36:21,866 INFO L93 Difference]: Finished difference Result 6307 states and 8289 transitions. [2020-12-22 09:36:21,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 09:36:21,869 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 111 [2020-12-22 09:36:21,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:36:21,876 INFO L225 Difference]: With dead ends: 6307 [2020-12-22 09:36:21,876 INFO L226 Difference]: Without dead ends: 4789 [2020-12-22 09:36:21,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=614, Invalid=2926, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 09:36:21,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4789 states. [2020-12-22 09:36:22,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4789 to 4215. [2020-12-22 09:36:22,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4215 states. [2020-12-22 09:36:22,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4215 states to 4215 states and 5672 transitions. [2020-12-22 09:36:22,477 INFO L78 Accepts]: Start accepts. Automaton has 4215 states and 5672 transitions. Word has length 111 [2020-12-22 09:36:22,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:36:22,477 INFO L481 AbstractCegarLoop]: Abstraction has 4215 states and 5672 transitions. [2020-12-22 09:36:22,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 09:36:22,478 INFO L276 IsEmpty]: Start isEmpty. Operand 4215 states and 5672 transitions. [2020-12-22 09:36:22,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 09:36:22,487 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:36:22,487 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2020-12-22 09:36:22,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 09:36:22,703 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:36:22,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:36:22,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1699429479, now seen corresponding path program 1 times [2020-12-22 09:36:22,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:36:22,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538890508] [2020-12-22 09:36:22,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:36:22,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:36:24,497 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:36:24,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538890508] [2020-12-22 09:36:24,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684067566] [2020-12-22 09:36:24,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:36:24,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:36:24,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 09:36:24,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:36:25,695 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2020-12-22 09:36:25,706 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:36:26,166 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:36:26,916 WARN L197 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 46 [2020-12-22 09:36:26,938 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:36:27,310 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-12-22 09:36:27,326 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:36:27,987 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 09:36:28,008 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:36:28,028 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:36:39,516 WARN L197 SmtUtils]: Spent 4.65 s on a formula simplification. DAG size of input: 346 DAG size of output: 45 [2020-12-22 09:36:40,982 WARN L197 SmtUtils]: Spent 511.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-22 09:36:42,420 WARN L197 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-22 09:36:42,566 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 25 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:36:42,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:36:42,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18] total 39 [2020-12-22 09:36:42,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865579227] [2020-12-22 09:36:42,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 09:36:42,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:36:42,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 09:36:42,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 09:36:42,569 INFO L87 Difference]: Start difference. First operand 4215 states and 5672 transitions. Second operand 39 states. [2020-12-22 09:36:42,919 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-12-22 09:36:44,138 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2020-12-22 09:36:44,411 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-22 09:36:44,754 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-12-22 09:36:45,117 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-12-22 09:36:45,410 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-12-22 09:36:45,708 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-12-22 09:36:46,115 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-12-22 09:36:46,941 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2020-12-22 09:36:47,549 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-12-22 09:36:48,083 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2020-12-22 09:36:49,089 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2020-12-22 09:36:53,298 WARN L197 SmtUtils]: Spent 2.99 s on a formula simplification. DAG size of input: 99 DAG size of output: 81 [2020-12-22 09:36:53,734 WARN L197 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2020-12-22 09:36:58,189 WARN L197 SmtUtils]: Spent 2.54 s on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-12-22 09:37:02,129 WARN L197 SmtUtils]: Spent 2.34 s on a formula simplification. DAG size of input: 93 DAG size of output: 78 [2020-12-22 09:37:02,383 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-12-22 09:37:04,370 WARN L197 SmtUtils]: Spent 701.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-12-22 09:37:08,489 WARN L197 SmtUtils]: Spent 2.51 s on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-12-22 09:37:13,359 WARN L197 SmtUtils]: Spent 2.58 s on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2020-12-22 09:37:16,557 WARN L197 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 75 [2020-12-22 09:37:19,335 WARN L197 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 58 [2020-12-22 09:37:23,015 WARN L197 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 75 [2020-12-22 09:37:23,240 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 09:37:26,156 WARN L197 SmtUtils]: Spent 1.48 s on a formula simplification that was a NOOP. DAG size: 58 [2020-12-22 09:37:26,399 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 09:37:26,976 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 09:37:29,620 WARN L197 SmtUtils]: Spent 809.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-12-22 09:37:33,737 WARN L197 SmtUtils]: Spent 626.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-12-22 09:37:34,094 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-22 09:37:36,039 WARN L197 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-12-22 09:37:41,303 WARN L197 SmtUtils]: Spent 1.59 s on a formula simplification that was a NOOP. DAG size: 75 [2020-12-22 09:37:42,893 WARN L197 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-12-22 09:37:45,434 WARN L197 SmtUtils]: Spent 815.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-12-22 09:37:50,209 WARN L197 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 58 [2020-12-22 09:37:54,095 WARN L197 SmtUtils]: Spent 1.53 s on a formula simplification that was a NOOP. DAG size: 66 [2020-12-22 09:37:54,513 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-12-22 09:37:56,894 WARN L197 SmtUtils]: Spent 652.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-12-22 09:38:00,881 WARN L197 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 66 [2020-12-22 09:38:03,318 WARN L197 SmtUtils]: Spent 497.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-12-22 09:38:08,846 WARN L197 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 62 [2020-12-22 09:38:16,628 WARN L197 SmtUtils]: Spent 1.75 s on a formula simplification that was a NOOP. DAG size: 77 [2020-12-22 09:38:16,996 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48