/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_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:34:29,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:34:29,853 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:34:29,904 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:34:29,905 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:34:29,906 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:34:29,908 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:34:29,911 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:34:29,913 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:34:29,914 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:34:29,915 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:34:29,917 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:34:29,917 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:34:29,919 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:34:29,920 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:34:29,921 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:34:29,922 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:34:29,924 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:34:29,926 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:34:29,928 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:34:29,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:34:29,932 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:34:29,933 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:34:29,934 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:34:29,938 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:34:29,949 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:34:29,950 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:34:29,951 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:34:29,956 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:34:29,998 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:34:29,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:34:30,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:34:30,000 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:34:30,000 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:34:30,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:34:30,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:34:30,001 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:34:30,001 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:34:30,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:34:30,002 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:34:30,002 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:34:30,002 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:34:30,002 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:34:30,003 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:34:30,003 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:34:30,003 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:34:30,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:34:30,004 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:34:30,004 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:34:30,004 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:34:30,004 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:34:30,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:34:30,005 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:34:30,005 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:34:30,005 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:34:30,441 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:34:30,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:34:30,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:34:30,490 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:34:30,490 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:34:30,492 INFO L432 ainManager$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_label03.c [2020-12-22 09:34:30,583 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27b6da8bd/501c12447d3d4fe39fd957a01f90a6e6/FLAG393e74d6a [2020-12-22 09:34:31,579 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:34:31,580 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label03.c [2020-12-22 09:34:31,621 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27b6da8bd/501c12447d3d4fe39fd957a01f90a6e6/FLAG393e74d6a [2020-12-22 09:34:32,036 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27b6da8bd/501c12447d3d4fe39fd957a01f90a6e6 [2020-12-22 09:34:32,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:34:32,041 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:34:32,043 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:34:32,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:34:32,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:34:32,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:34:32" (1/1) ... [2020-12-22 09:34:32,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62b3918b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:32, skipping insertion in model container [2020-12-22 09:34:32,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:34:32" (1/1) ... [2020-12-22 09:34:32,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:34:32,194 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:34:32,542 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_label03.c[6412,6425] [2020-12-22 09:34:32,588 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_label03.c[8506,8519] [2020-12-22 09:34:33,869 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:34:33,886 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:34:33,942 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_label03.c[6412,6425] [2020-12-22 09:34:33,949 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_label03.c[8506,8519] [2020-12-22 09:34:34,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:34:34,719 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:34:34,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:34 WrapperNode [2020-12-22 09:34:34,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:34:34,721 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:34:34,721 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:34:34,721 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:34:34,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:34" (1/1) ... [2020-12-22 09:34:34,797 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:34" (1/1) ... [2020-12-22 09:34:35,330 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:34:35,333 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:34:35,333 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:34:35,333 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:34:35,345 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:34" (1/1) ... [2020-12-22 09:34:35,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:34" (1/1) ... [2020-12-22 09:34:35,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:34" (1/1) ... [2020-12-22 09:34:35,427 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:34" (1/1) ... [2020-12-22 09:34:35,671 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:34" (1/1) ... [2020-12-22 09:34:35,724 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:34" (1/1) ... [2020-12-22 09:34:35,862 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:34" (1/1) ... [2020-12-22 09:34:35,999 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:34:36,001 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:34:36,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:34:36,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:34:36,003 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:34" (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 09:34:36,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:34:36,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:34:36,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:34:36,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:34:41,694 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:34:41,694 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2020-12-22 09:34:41,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:34:41 BoogieIcfgContainer [2020-12-22 09:34:41,698 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:34:41,699 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:34:41,700 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:34:41,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:34:41,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:34:32" (1/3) ... [2020-12-22 09:34:41,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@81ad062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:34:41, skipping insertion in model container [2020-12-22 09:34:41,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:34" (2/3) ... [2020-12-22 09:34:41,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@81ad062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:34:41, skipping insertion in model container [2020-12-22 09:34:41,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:34:41" (3/3) ... [2020-12-22 09:34:41,707 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label03.c [2020-12-22 09:34:41,713 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:34:41,719 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:34:41,739 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:34:41,788 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:34:41,788 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:34:41,789 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:34:41,789 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:34:41,793 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:34:41,793 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:34:41,793 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:34:41,793 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:34:41,835 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states. [2020-12-22 09:34:41,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 09:34:41,846 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:41,848 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] [2020-12-22 09:34:41,849 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:41,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:41,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1700470853, now seen corresponding path program 1 times [2020-12-22 09:34:41,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:41,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137716501] [2020-12-22 09:34:41,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:42,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:42,291 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 09:34:42,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137716501] [2020-12-22 09:34:42,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:42,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:34:42,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640018457] [2020-12-22 09:34:42,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:34:42,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:42,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:34:42,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:34:42,325 INFO L87 Difference]: Start difference. First operand 878 states. Second operand 3 states. [2020-12-22 09:34:48,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:48,516 INFO L93 Difference]: Finished difference Result 2489 states and 4794 transitions. [2020-12-22 09:34:48,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:34:48,518 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-12-22 09:34:48,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:48,555 INFO L225 Difference]: With dead ends: 2489 [2020-12-22 09:34:48,556 INFO L226 Difference]: Without dead ends: 1563 [2020-12-22 09:34:48,564 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 09:34:48,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1563 states. [2020-12-22 09:34:48,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1563 to 1563. [2020-12-22 09:34:48,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1563 states. [2020-12-22 09:34:48,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 2560 transitions. [2020-12-22 09:34:48,769 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 2560 transitions. Word has length 20 [2020-12-22 09:34:48,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:48,770 INFO L481 AbstractCegarLoop]: Abstraction has 1563 states and 2560 transitions. [2020-12-22 09:34:48,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:34:48,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 2560 transitions. [2020-12-22 09:34:48,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 09:34:48,774 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:48,774 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 09:34:48,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:34:48,775 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:48,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:48,778 INFO L82 PathProgramCache]: Analyzing trace with hash 157814817, now seen corresponding path program 1 times [2020-12-22 09:34:48,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:48,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466547076] [2020-12-22 09:34:48,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:48,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:48,905 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 09:34:48,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466547076] [2020-12-22 09:34:48,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:48,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:48,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579802246] [2020-12-22 09:34:48,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:34:48,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:48,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:34:48,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:34:48,913 INFO L87 Difference]: Start difference. First operand 1563 states and 2560 transitions. Second operand 5 states. [2020-12-22 09:34:49,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:49,029 INFO L93 Difference]: Finished difference Result 1639 states and 2676 transitions. [2020-12-22 09:34:49,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:34:49,030 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-22 09:34:49,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:49,039 INFO L225 Difference]: With dead ends: 1639 [2020-12-22 09:34:49,040 INFO L226 Difference]: Without dead ends: 1599 [2020-12-22 09:34:49,042 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 09:34:49,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2020-12-22 09:34:49,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1563. [2020-12-22 09:34:49,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1563 states. [2020-12-22 09:34:49,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 2544 transitions. [2020-12-22 09:34:49,092 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 2544 transitions. Word has length 26 [2020-12-22 09:34:49,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:49,092 INFO L481 AbstractCegarLoop]: Abstraction has 1563 states and 2544 transitions. [2020-12-22 09:34:49,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:34:49,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 2544 transitions. [2020-12-22 09:34:49,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:34:49,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:49,102 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 09:34:49,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:34:49,103 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:49,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:49,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1324654887, now seen corresponding path program 1 times [2020-12-22 09:34:49,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:49,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120147313] [2020-12-22 09:34:49,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:49,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:49,210 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 09:34:49,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120147313] [2020-12-22 09:34:49,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:49,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:34:49,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204151623] [2020-12-22 09:34:49,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:34:49,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:49,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:34:49,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:34:49,213 INFO L87 Difference]: Start difference. First operand 1563 states and 2544 transitions. Second operand 3 states. [2020-12-22 09:34:49,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:49,255 INFO L93 Difference]: Finished difference Result 1629 states and 2646 transitions. [2020-12-22 09:34:49,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:34:49,256 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 09:34:49,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:49,266 INFO L225 Difference]: With dead ends: 1629 [2020-12-22 09:34:49,267 INFO L226 Difference]: Without dead ends: 1593 [2020-12-22 09:34:49,268 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 09:34:49,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2020-12-22 09:34:49,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1591. [2020-12-22 09:34:49,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1591 states. [2020-12-22 09:34:49,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 2588 transitions. [2020-12-22 09:34:49,325 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 2588 transitions. Word has length 41 [2020-12-22 09:34:49,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:49,326 INFO L481 AbstractCegarLoop]: Abstraction has 1591 states and 2588 transitions. [2020-12-22 09:34:49,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:34:49,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 2588 transitions. [2020-12-22 09:34:49,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:34:49,327 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:49,327 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 09:34:49,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:34:49,328 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:49,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:49,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1376027727, now seen corresponding path program 1 times [2020-12-22 09:34:49,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:49,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136559027] [2020-12-22 09:34:49,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:49,437 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 09:34:49,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136559027] [2020-12-22 09:34:49,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:49,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:49,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661669822] [2020-12-22 09:34:49,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:34:49,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:49,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:34:49,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:34:49,443 INFO L87 Difference]: Start difference. First operand 1591 states and 2588 transitions. Second operand 5 states. [2020-12-22 09:34:49,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:49,612 INFO L93 Difference]: Finished difference Result 1975 states and 3188 transitions. [2020-12-22 09:34:49,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:34:49,613 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-12-22 09:34:49,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:49,626 INFO L225 Difference]: With dead ends: 1975 [2020-12-22 09:34:49,626 INFO L226 Difference]: Without dead ends: 1911 [2020-12-22 09:34:49,627 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 09:34:49,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2020-12-22 09:34:49,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1653. [2020-12-22 09:34:49,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1653 states. [2020-12-22 09:34:49,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 2683 transitions. [2020-12-22 09:34:49,686 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 2683 transitions. Word has length 41 [2020-12-22 09:34:49,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:49,686 INFO L481 AbstractCegarLoop]: Abstraction has 1653 states and 2683 transitions. [2020-12-22 09:34:49,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:34:49,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 2683 transitions. [2020-12-22 09:34:49,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:34:49,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:49,690 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 09:34:49,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:34:49,690 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:49,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:49,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1902982177, now seen corresponding path program 1 times [2020-12-22 09:34:49,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:49,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388056655] [2020-12-22 09:34:49,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:49,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:49,788 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 09:34:49,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388056655] [2020-12-22 09:34:49,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:49,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:34:49,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34300208] [2020-12-22 09:34:49,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:34:49,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:49,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:34:49,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:34:49,792 INFO L87 Difference]: Start difference. First operand 1653 states and 2683 transitions. Second operand 3 states. [2020-12-22 09:34:49,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:49,852 INFO L93 Difference]: Finished difference Result 1840 states and 2970 transitions. [2020-12-22 09:34:49,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:34:49,852 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:34:49,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:49,863 INFO L225 Difference]: With dead ends: 1840 [2020-12-22 09:34:49,863 INFO L226 Difference]: Without dead ends: 1714 [2020-12-22 09:34:49,864 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 09:34:49,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2020-12-22 09:34:49,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1712. [2020-12-22 09:34:49,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1712 states. [2020-12-22 09:34:49,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 2771 transitions. [2020-12-22 09:34:49,916 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 2771 transitions. Word has length 43 [2020-12-22 09:34:49,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:49,918 INFO L481 AbstractCegarLoop]: Abstraction has 1712 states and 2771 transitions. [2020-12-22 09:34:49,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:34:49,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 2771 transitions. [2020-12-22 09:34:49,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:34:49,919 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:49,919 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 09:34:49,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:34:49,920 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:49,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:49,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1836488665, now seen corresponding path program 1 times [2020-12-22 09:34:49,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:49,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345168294] [2020-12-22 09:34:49,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:50,082 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 09:34:50,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345168294] [2020-12-22 09:34:50,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:50,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:50,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348921995] [2020-12-22 09:34:50,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:34:50,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:50,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:34:50,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:34:50,084 INFO L87 Difference]: Start difference. First operand 1712 states and 2771 transitions. Second operand 5 states. [2020-12-22 09:34:50,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:50,208 INFO L93 Difference]: Finished difference Result 1897 states and 3053 transitions. [2020-12-22 09:34:50,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:34:50,209 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-22 09:34:50,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:50,219 INFO L225 Difference]: With dead ends: 1897 [2020-12-22 09:34:50,219 INFO L226 Difference]: Without dead ends: 1714 [2020-12-22 09:34:50,221 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 09:34:50,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2020-12-22 09:34:50,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1712. [2020-12-22 09:34:50,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1712 states. [2020-12-22 09:34:50,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 2768 transitions. [2020-12-22 09:34:50,271 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 2768 transitions. Word has length 43 [2020-12-22 09:34:50,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:50,272 INFO L481 AbstractCegarLoop]: Abstraction has 1712 states and 2768 transitions. [2020-12-22 09:34:50,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:34:50,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 2768 transitions. [2020-12-22 09:34:50,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:34:50,273 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:50,273 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:34:50,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:34:50,273 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:50,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:50,274 INFO L82 PathProgramCache]: Analyzing trace with hash -47574589, now seen corresponding path program 1 times [2020-12-22 09:34:50,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:50,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313093602] [2020-12-22 09:34:50,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:50,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:50,316 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 09:34:50,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313093602] [2020-12-22 09:34:50,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:50,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:34:50,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880141911] [2020-12-22 09:34:50,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:34:50,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:50,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:34:50,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:34:50,319 INFO L87 Difference]: Start difference. First operand 1712 states and 2768 transitions. Second operand 3 states. [2020-12-22 09:34:50,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:50,376 INFO L93 Difference]: Finished difference Result 2042 states and 3264 transitions. [2020-12-22 09:34:50,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:34:50,377 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:34:50,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:50,388 INFO L225 Difference]: With dead ends: 2042 [2020-12-22 09:34:50,389 INFO L226 Difference]: Without dead ends: 1859 [2020-12-22 09:34:50,390 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 09:34:50,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1859 states. [2020-12-22 09:34:50,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1859 to 1857. [2020-12-22 09:34:50,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1857 states. [2020-12-22 09:34:50,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 2979 transitions. [2020-12-22 09:34:50,452 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 2979 transitions. Word has length 43 [2020-12-22 09:34:50,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:50,453 INFO L481 AbstractCegarLoop]: Abstraction has 1857 states and 2979 transitions. [2020-12-22 09:34:50,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:34:50,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 2979 transitions. [2020-12-22 09:34:50,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:34:50,453 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:50,454 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:34:50,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:34:50,455 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:50,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:50,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1199933027, now seen corresponding path program 1 times [2020-12-22 09:34:50,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:50,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201256790] [2020-12-22 09:34:50,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:50,512 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 09:34:50,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201256790] [2020-12-22 09:34:50,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:50,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:34:50,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390437432] [2020-12-22 09:34:50,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:34:50,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:50,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:34:50,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:34:50,514 INFO L87 Difference]: Start difference. First operand 1857 states and 2979 transitions. Second operand 3 states. [2020-12-22 09:34:50,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:50,592 INFO L93 Difference]: Finished difference Result 2441 states and 3837 transitions. [2020-12-22 09:34:50,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:34:50,593 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:34:50,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:50,605 INFO L225 Difference]: With dead ends: 2441 [2020-12-22 09:34:50,606 INFO L226 Difference]: Without dead ends: 2113 [2020-12-22 09:34:50,608 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 09:34:50,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2020-12-22 09:34:50,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 2111. [2020-12-22 09:34:50,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2111 states. [2020-12-22 09:34:50,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2111 states to 2111 states and 3335 transitions. [2020-12-22 09:34:50,684 INFO L78 Accepts]: Start accepts. Automaton has 2111 states and 3335 transitions. Word has length 43 [2020-12-22 09:34:50,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:50,684 INFO L481 AbstractCegarLoop]: Abstraction has 2111 states and 3335 transitions. [2020-12-22 09:34:50,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:34:50,685 INFO L276 IsEmpty]: Start isEmpty. Operand 2111 states and 3335 transitions. [2020-12-22 09:34:50,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 09:34:50,685 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:50,685 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 09:34:50,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:34:50,686 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:50,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:50,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1511296967, now seen corresponding path program 1 times [2020-12-22 09:34:50,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:50,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735787992] [2020-12-22 09:34:50,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:50,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:50,817 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 09:34:50,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735787992] [2020-12-22 09:34:50,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:50,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:50,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404624969] [2020-12-22 09:34:50,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:34:50,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:50,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:34:50,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:34:50,821 INFO L87 Difference]: Start difference. First operand 2111 states and 3335 transitions. Second operand 5 states. [2020-12-22 09:34:50,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:50,974 INFO L93 Difference]: Finished difference Result 2634 states and 4063 transitions. [2020-12-22 09:34:50,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:34:50,975 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-12-22 09:34:50,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:50,991 INFO L225 Difference]: With dead ends: 2634 [2020-12-22 09:34:50,992 INFO L226 Difference]: Without dead ends: 2632 [2020-12-22 09:34:50,993 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 09:34:50,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2020-12-22 09:34:51,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2159. [2020-12-22 09:34:51,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2159 states. [2020-12-22 09:34:51,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 3379 transitions. [2020-12-22 09:34:51,105 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 3379 transitions. Word has length 44 [2020-12-22 09:34:51,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:51,107 INFO L481 AbstractCegarLoop]: Abstraction has 2159 states and 3379 transitions. [2020-12-22 09:34:51,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:34:51,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 3379 transitions. [2020-12-22 09:34:51,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:34:51,109 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:51,109 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 09:34:51,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:34:51,109 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:51,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:51,110 INFO L82 PathProgramCache]: Analyzing trace with hash -213997176, now seen corresponding path program 1 times [2020-12-22 09:34:51,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:51,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893210425] [2020-12-22 09:34:51,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:51,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:51,305 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 09:34:51,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893210425] [2020-12-22 09:34:51,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:51,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:51,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505647343] [2020-12-22 09:34:51,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:34:51,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:51,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:34:51,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:34:51,308 INFO L87 Difference]: Start difference. First operand 2159 states and 3379 transitions. Second operand 5 states. [2020-12-22 09:34:51,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:51,547 INFO L93 Difference]: Finished difference Result 4187 states and 6227 transitions. [2020-12-22 09:34:51,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:34:51,553 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 09:34:51,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:51,577 INFO L225 Difference]: With dead ends: 4187 [2020-12-22 09:34:51,578 INFO L226 Difference]: Without dead ends: 3557 [2020-12-22 09:34:51,582 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 09:34:51,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2020-12-22 09:34:51,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 2787. [2020-12-22 09:34:51,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2787 states. [2020-12-22 09:34:51,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 4255 transitions. [2020-12-22 09:34:51,731 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 4255 transitions. Word has length 64 [2020-12-22 09:34:51,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:51,732 INFO L481 AbstractCegarLoop]: Abstraction has 2787 states and 4255 transitions. [2020-12-22 09:34:51,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:34:51,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 4255 transitions. [2020-12-22 09:34:51,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:34:51,733 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:51,733 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 09:34:51,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:34:51,734 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:51,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:51,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1033510440, now seen corresponding path program 1 times [2020-12-22 09:34:51,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:51,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605536879] [2020-12-22 09:34:51,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:51,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:51,809 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 09:34:51,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605536879] [2020-12-22 09:34:51,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:51,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:51,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362851690] [2020-12-22 09:34:51,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:34:51,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:51,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:34:51,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:34:51,813 INFO L87 Difference]: Start difference. First operand 2787 states and 4255 transitions. Second operand 5 states. [2020-12-22 09:34:52,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:52,082 INFO L93 Difference]: Finished difference Result 4815 states and 7103 transitions. [2020-12-22 09:34:52,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:34:52,082 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 09:34:52,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:52,128 INFO L225 Difference]: With dead ends: 4815 [2020-12-22 09:34:52,128 INFO L226 Difference]: Without dead ends: 4185 [2020-12-22 09:34:52,134 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 09:34:52,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4185 states. [2020-12-22 09:34:52,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4185 to 3731. [2020-12-22 09:34:52,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3731 states. [2020-12-22 09:34:52,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3731 states to 3731 states and 5559 transitions. [2020-12-22 09:34:52,365 INFO L78 Accepts]: Start accepts. Automaton has 3731 states and 5559 transitions. Word has length 64 [2020-12-22 09:34:52,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:52,365 INFO L481 AbstractCegarLoop]: Abstraction has 3731 states and 5559 transitions. [2020-12-22 09:34:52,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:34:52,365 INFO L276 IsEmpty]: Start isEmpty. Operand 3731 states and 5559 transitions. [2020-12-22 09:34:52,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:34:52,367 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:52,367 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 09:34:52,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:34:52,369 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:52,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:52,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1792023874, now seen corresponding path program 1 times [2020-12-22 09:34:52,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:52,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626433424] [2020-12-22 09:34:52,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:52,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:52,452 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 09:34:52,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626433424] [2020-12-22 09:34:52,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:52,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:52,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231909616] [2020-12-22 09:34:52,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:34:52,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:52,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:34:52,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:34:52,455 INFO L87 Difference]: Start difference. First operand 3731 states and 5559 transitions. Second operand 5 states. [2020-12-22 09:34:52,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:52,757 INFO L93 Difference]: Finished difference Result 5083 states and 7483 transitions. [2020-12-22 09:34:52,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:34:52,758 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 09:34:52,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:52,769 INFO L225 Difference]: With dead ends: 5083 [2020-12-22 09:34:52,769 INFO L226 Difference]: Without dead ends: 4633 [2020-12-22 09:34:52,772 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 09:34:52,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4633 states. [2020-12-22 09:34:53,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4633 to 4179. [2020-12-22 09:34:53,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4179 states. [2020-12-22 09:34:53,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4179 states to 4179 states and 6191 transitions. [2020-12-22 09:34:53,105 INFO L78 Accepts]: Start accepts. Automaton has 4179 states and 6191 transitions. Word has length 64 [2020-12-22 09:34:53,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:53,105 INFO L481 AbstractCegarLoop]: Abstraction has 4179 states and 6191 transitions. [2020-12-22 09:34:53,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:34:53,105 INFO L276 IsEmpty]: Start isEmpty. Operand 4179 states and 6191 transitions. [2020-12-22 09:34:53,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:34:53,107 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:53,107 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 09:34:53,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:34:53,107 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:53,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:53,108 INFO L82 PathProgramCache]: Analyzing trace with hash 322769619, now seen corresponding path program 1 times [2020-12-22 09:34:53,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:53,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608956664] [2020-12-22 09:34:53,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:53,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:53,156 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 09:34:53,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608956664] [2020-12-22 09:34:53,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:53,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:34:53,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372429395] [2020-12-22 09:34:53,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:34:53,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:53,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:34:53,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:34:53,159 INFO L87 Difference]: Start difference. First operand 4179 states and 6191 transitions. Second operand 3 states. [2020-12-22 09:34:53,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:53,388 INFO L93 Difference]: Finished difference Result 6831 states and 9893 transitions. [2020-12-22 09:34:53,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:34:53,389 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 09:34:53,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:53,400 INFO L225 Difference]: With dead ends: 6831 [2020-12-22 09:34:53,400 INFO L226 Difference]: Without dead ends: 4181 [2020-12-22 09:34:53,406 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 09:34:53,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2020-12-22 09:34:53,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 4179. [2020-12-22 09:34:53,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4179 states. [2020-12-22 09:34:53,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4179 states to 4179 states and 6141 transitions. [2020-12-22 09:34:53,635 INFO L78 Accepts]: Start accepts. Automaton has 4179 states and 6141 transitions. Word has length 65 [2020-12-22 09:34:53,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:53,635 INFO L481 AbstractCegarLoop]: Abstraction has 4179 states and 6141 transitions. [2020-12-22 09:34:53,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:34:53,636 INFO L276 IsEmpty]: Start isEmpty. Operand 4179 states and 6141 transitions. [2020-12-22 09:34:53,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:34:53,643 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:53,643 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 09:34:53,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:34:53,644 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:53,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:53,644 INFO L82 PathProgramCache]: Analyzing trace with hash 235650825, now seen corresponding path program 1 times [2020-12-22 09:34:53,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:53,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80903408] [2020-12-22 09:34:53,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:53,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:53,707 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 09:34:53,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80903408] [2020-12-22 09:34:53,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:53,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:34:53,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227212676] [2020-12-22 09:34:53,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:34:53,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:53,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:34:53,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:34:53,710 INFO L87 Difference]: Start difference. First operand 4179 states and 6141 transitions. Second operand 3 states. [2020-12-22 09:34:53,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:53,844 INFO L93 Difference]: Finished difference Result 5507 states and 7968 transitions. [2020-12-22 09:34:53,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:34:53,845 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 09:34:53,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:53,851 INFO L225 Difference]: With dead ends: 5507 [2020-12-22 09:34:53,852 INFO L226 Difference]: Without dead ends: 2857 [2020-12-22 09:34:53,857 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 09:34:53,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2857 states. [2020-12-22 09:34:53,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2857 to 2855. [2020-12-22 09:34:53,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2855 states. [2020-12-22 09:34:53,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2855 states to 2855 states and 4291 transitions. [2020-12-22 09:34:53,990 INFO L78 Accepts]: Start accepts. Automaton has 2855 states and 4291 transitions. Word has length 65 [2020-12-22 09:34:53,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:53,990 INFO L481 AbstractCegarLoop]: Abstraction has 2855 states and 4291 transitions. [2020-12-22 09:34:53,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:34:53,990 INFO L276 IsEmpty]: Start isEmpty. Operand 2855 states and 4291 transitions. [2020-12-22 09:34:53,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:34:53,991 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:53,992 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 09:34:53,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:34:53,992 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:53,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:53,993 INFO L82 PathProgramCache]: Analyzing trace with hash -883624385, now seen corresponding path program 1 times [2020-12-22 09:34:53,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:53,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391418367] [2020-12-22 09:34:53,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:54,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:54,144 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 09:34:54,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391418367] [2020-12-22 09:34:54,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380769968] [2020-12-22 09:34:54,145 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 09:34:54,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:54,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 09:34:54,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:34:54,519 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 09:34:54,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:34:54,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9] total 10 [2020-12-22 09:34:54,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375745157] [2020-12-22 09:34:54,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 09:34:54,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:54,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 09:34:54,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:34:54,522 INFO L87 Difference]: Start difference. First operand 2855 states and 4291 transitions. Second operand 10 states. [2020-12-22 09:34:54,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:54,918 INFO L93 Difference]: Finished difference Result 4704 states and 6828 transitions. [2020-12-22 09:34:54,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:34:54,920 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-12-22 09:34:54,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:54,931 INFO L225 Difference]: With dead ends: 4704 [2020-12-22 09:34:54,932 INFO L226 Difference]: Without dead ends: 3694 [2020-12-22 09:34:54,936 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 09:34:54,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2020-12-22 09:34:55,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 3661. [2020-12-22 09:34:55,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3661 states. [2020-12-22 09:34:55,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3661 states to 3661 states and 5347 transitions. [2020-12-22 09:34:55,199 INFO L78 Accepts]: Start accepts. Automaton has 3661 states and 5347 transitions. Word has length 65 [2020-12-22 09:34:55,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:55,199 INFO L481 AbstractCegarLoop]: Abstraction has 3661 states and 5347 transitions. [2020-12-22 09:34:55,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 09:34:55,200 INFO L276 IsEmpty]: Start isEmpty. Operand 3661 states and 5347 transitions. [2020-12-22 09:34:55,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:34:55,201 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:55,201 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 09:34:55,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 09:34:55,416 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:55,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:55,417 INFO L82 PathProgramCache]: Analyzing trace with hash 752221610, now seen corresponding path program 1 times [2020-12-22 09:34:55,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:55,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999507721] [2020-12-22 09:34:55,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:55,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:55,722 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 09:34:55,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999507721] [2020-12-22 09:34:55,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599613207] [2020-12-22 09:34:55,723 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 09:34:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:55,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 09:34:55,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:34:56,078 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:34:56,382 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 09:34:56,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:34:56,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:34:56,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743507290] [2020-12-22 09:34:56,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:34:56,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:56,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:34:56,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:34:56,385 INFO L87 Difference]: Start difference. First operand 3661 states and 5347 transitions. Second operand 17 states. [2020-12-22 09:34:58,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:58,613 INFO L93 Difference]: Finished difference Result 10680 states and 14617 transitions. [2020-12-22 09:34:58,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 09:34:58,614 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-12-22 09:34:58,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:58,633 INFO L225 Difference]: With dead ends: 10680 [2020-12-22 09:34:58,633 INFO L226 Difference]: Without dead ends: 9189 [2020-12-22 09:34:58,639 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 09:34:58,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9189 states. [2020-12-22 09:34:59,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9189 to 6136. [2020-12-22 09:34:59,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6136 states. [2020-12-22 09:34:59,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6136 states to 6136 states and 8625 transitions. [2020-12-22 09:34:59,123 INFO L78 Accepts]: Start accepts. Automaton has 6136 states and 8625 transitions. Word has length 66 [2020-12-22 09:34:59,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:59,123 INFO L481 AbstractCegarLoop]: Abstraction has 6136 states and 8625 transitions. [2020-12-22 09:34:59,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:34:59,124 INFO L276 IsEmpty]: Start isEmpty. Operand 6136 states and 8625 transitions. [2020-12-22 09:34:59,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:34:59,125 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:59,125 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 09:34:59,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 09:34:59,339 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:59,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:59,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1910012548, now seen corresponding path program 1 times [2020-12-22 09:34:59,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:59,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999536637] [2020-12-22 09:34:59,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:59,575 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 09:34:59,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999536637] [2020-12-22 09:34:59,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764682993] [2020-12-22 09:34:59,576 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 09:34:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:59,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:34:59,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:34:59,849 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:35:00,134 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 09:35:00,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:35:00,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:35:00,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503553033] [2020-12-22 09:35:00,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:35:00,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:35:00,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:35:00,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:35:00,137 INFO L87 Difference]: Start difference. First operand 6136 states and 8625 transitions. Second operand 17 states. [2020-12-22 09:35:04,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:35:04,722 INFO L93 Difference]: Finished difference Result 29250 states and 39197 transitions. [2020-12-22 09:35:04,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 09:35:04,723 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-12-22 09:35:04,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:35:04,777 INFO L225 Difference]: With dead ends: 29250 [2020-12-22 09:35:04,777 INFO L226 Difference]: Without dead ends: 24643 [2020-12-22 09:35:04,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 09:35:04,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24643 states. [2020-12-22 09:35:05,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24643 to 11635. [2020-12-22 09:35:05,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11635 states. [2020-12-22 09:35:05,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11635 states to 11635 states and 15752 transitions. [2020-12-22 09:35:05,863 INFO L78 Accepts]: Start accepts. Automaton has 11635 states and 15752 transitions. Word has length 66 [2020-12-22 09:35:05,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:35:05,864 INFO L481 AbstractCegarLoop]: Abstraction has 11635 states and 15752 transitions. [2020-12-22 09:35:05,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:35:05,864 INFO L276 IsEmpty]: Start isEmpty. Operand 11635 states and 15752 transitions. [2020-12-22 09:35:05,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:35:05,866 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:35:05,866 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 09:35:06,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 09:35:06,082 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:35:06,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:35:06,082 INFO L82 PathProgramCache]: Analyzing trace with hash 616171932, now seen corresponding path program 1 times [2020-12-22 09:35:06,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:35:06,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030052500] [2020-12-22 09:35:06,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:35:06,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:06,342 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 09:35:06,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030052500] [2020-12-22 09:35:06,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769261980] [2020-12-22 09:35:06,343 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 09:35:06,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:06,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 09:35:06,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:35:06,662 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:35:07,088 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 09:35:07,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:35:07,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:35:07,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46358948] [2020-12-22 09:35:07,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:35:07,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:35:07,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:35:07,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:35:07,094 INFO L87 Difference]: Start difference. First operand 11635 states and 15752 transitions. Second operand 17 states. [2020-12-22 09:35:11,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:35:11,613 INFO L93 Difference]: Finished difference Result 54429 states and 71088 transitions. [2020-12-22 09:35:11,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:35:11,613 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-12-22 09:35:11,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:35:11,704 INFO L225 Difference]: With dead ends: 54429 [2020-12-22 09:35:11,704 INFO L226 Difference]: Without dead ends: 44323 [2020-12-22 09:35:11,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:35:11,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44323 states. [2020-12-22 09:35:14,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44323 to 29071. [2020-12-22 09:35:14,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29071 states. [2020-12-22 09:35:14,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29071 states to 29071 states and 38180 transitions. [2020-12-22 09:35:14,408 INFO L78 Accepts]: Start accepts. Automaton has 29071 states and 38180 transitions. Word has length 66 [2020-12-22 09:35:14,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:35:14,408 INFO L481 AbstractCegarLoop]: Abstraction has 29071 states and 38180 transitions. [2020-12-22 09:35:14,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:35:14,408 INFO L276 IsEmpty]: Start isEmpty. Operand 29071 states and 38180 transitions. [2020-12-22 09:35:14,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:35:14,411 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:35:14,411 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 09:35:14,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 09:35:14,625 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:35:14,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:35:14,626 INFO L82 PathProgramCache]: Analyzing trace with hash -434236462, now seen corresponding path program 1 times [2020-12-22 09:35:14,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:35:14,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386806684] [2020-12-22 09:35:14,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:35:14,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:14,671 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 09:35:14,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386806684] [2020-12-22 09:35:14,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:35:14,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:35:14,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431298439] [2020-12-22 09:35:14,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:35:14,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:35:14,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:35:14,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:35:14,673 INFO L87 Difference]: Start difference. First operand 29071 states and 38180 transitions. Second operand 3 states. [2020-12-22 09:35:15,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:35:15,836 INFO L93 Difference]: Finished difference Result 41067 states and 53710 transitions. [2020-12-22 09:35:15,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:35:15,837 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:35:15,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:35:15,866 INFO L225 Difference]: With dead ends: 41067 [2020-12-22 09:35:15,866 INFO L226 Difference]: Without dead ends: 13525 [2020-12-22 09:35:15,905 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 09:35:15,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13525 states. [2020-12-22 09:35:17,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13525 to 12473. [2020-12-22 09:35:17,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12473 states. [2020-12-22 09:35:17,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12473 states to 12473 states and 16469 transitions. [2020-12-22 09:35:17,030 INFO L78 Accepts]: Start accepts. Automaton has 12473 states and 16469 transitions. Word has length 66 [2020-12-22 09:35:17,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:35:17,030 INFO L481 AbstractCegarLoop]: Abstraction has 12473 states and 16469 transitions. [2020-12-22 09:35:17,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:35:17,030 INFO L276 IsEmpty]: Start isEmpty. Operand 12473 states and 16469 transitions. [2020-12-22 09:35:17,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:35:17,032 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:35:17,032 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 09:35:17,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:35:17,032 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:35:17,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:35:17,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1433407838, now seen corresponding path program 1 times [2020-12-22 09:35:17,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:35:17,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833994746] [2020-12-22 09:35:17,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:35:17,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:17,103 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 09:35:17,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833994746] [2020-12-22 09:35:17,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:35:17,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:35:17,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287564800] [2020-12-22 09:35:17,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:35:17,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:35:17,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:35:17,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:35:17,111 INFO L87 Difference]: Start difference. First operand 12473 states and 16469 transitions. Second operand 6 states. [2020-12-22 09:35:17,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:35:17,986 INFO L93 Difference]: Finished difference Result 21538 states and 28116 transitions. [2020-12-22 09:35:17,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:35:17,987 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 09:35:17,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:35:18,008 INFO L225 Difference]: With dead ends: 21538 [2020-12-22 09:35:18,009 INFO L226 Difference]: Without dead ends: 10671 [2020-12-22 09:35:18,021 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 09:35:18,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10671 states. [2020-12-22 09:35:18,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10671 to 10671. [2020-12-22 09:35:18,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10671 states. [2020-12-22 09:35:18,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10671 states to 10671 states and 13947 transitions. [2020-12-22 09:35:18,946 INFO L78 Accepts]: Start accepts. Automaton has 10671 states and 13947 transitions. Word has length 66 [2020-12-22 09:35:18,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:35:18,946 INFO L481 AbstractCegarLoop]: Abstraction has 10671 states and 13947 transitions. [2020-12-22 09:35:18,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:35:18,946 INFO L276 IsEmpty]: Start isEmpty. Operand 10671 states and 13947 transitions. [2020-12-22 09:35:18,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:35:18,948 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:35:18,948 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 09:35:18,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:35:18,948 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:35:18,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:35:18,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1275703454, now seen corresponding path program 1 times [2020-12-22 09:35:18,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:35:18,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63200921] [2020-12-22 09:35:18,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:35:18,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:19,025 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 09:35:19,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63200921] [2020-12-22 09:35:19,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:35:19,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:35:19,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858632072] [2020-12-22 09:35:19,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:35:19,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:35:19,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:35:19,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:35:19,027 INFO L87 Difference]: Start difference. First operand 10671 states and 13947 transitions. Second operand 6 states. [2020-12-22 09:35:19,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:35:19,951 INFO L93 Difference]: Finished difference Result 17448 states and 22483 transitions. [2020-12-22 09:35:19,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:35:19,951 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 09:35:19,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:35:19,966 INFO L225 Difference]: With dead ends: 17448 [2020-12-22 09:35:19,966 INFO L226 Difference]: Without dead ends: 8419 [2020-12-22 09:35:19,972 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 09:35:19,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8419 states. [2020-12-22 09:35:20,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8419 to 8419. [2020-12-22 09:35:20,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8419 states. [2020-12-22 09:35:20,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8419 states to 8419 states and 10979 transitions. [2020-12-22 09:35:20,645 INFO L78 Accepts]: Start accepts. Automaton has 8419 states and 10979 transitions. Word has length 66 [2020-12-22 09:35:20,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:35:20,645 INFO L481 AbstractCegarLoop]: Abstraction has 8419 states and 10979 transitions. [2020-12-22 09:35:20,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:35:20,645 INFO L276 IsEmpty]: Start isEmpty. Operand 8419 states and 10979 transitions. [2020-12-22 09:35:20,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:35:20,646 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:35:20,646 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 09:35:20,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:35:20,647 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:35:20,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:35:20,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1486365826, now seen corresponding path program 1 times [2020-12-22 09:35:20,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:35:20,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554213122] [2020-12-22 09:35:20,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:35:20,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:20,711 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 09:35:20,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554213122] [2020-12-22 09:35:20,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:35:20,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:35:20,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508583401] [2020-12-22 09:35:20,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:35:20,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:35:20,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:35:20,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:35:20,715 INFO L87 Difference]: Start difference. First operand 8419 states and 10979 transitions. Second operand 6 states. [2020-12-22 09:35:21,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:35:21,373 INFO L93 Difference]: Finished difference Result 13769 states and 17636 transitions. [2020-12-22 09:35:21,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:35:21,376 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 09:35:21,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:35:21,384 INFO L225 Difference]: With dead ends: 13769 [2020-12-22 09:35:21,384 INFO L226 Difference]: Without dead ends: 6915 [2020-12-22 09:35:21,389 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 09:35:21,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6915 states. [2020-12-22 09:35:21,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6915 to 6915. [2020-12-22 09:35:21,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6915 states. [2020-12-22 09:35:21,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6915 states to 6915 states and 9073 transitions. [2020-12-22 09:35:21,887 INFO L78 Accepts]: Start accepts. Automaton has 6915 states and 9073 transitions. Word has length 66 [2020-12-22 09:35:21,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:35:21,887 INFO L481 AbstractCegarLoop]: Abstraction has 6915 states and 9073 transitions. [2020-12-22 09:35:21,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:35:21,888 INFO L276 IsEmpty]: Start isEmpty. Operand 6915 states and 9073 transitions. [2020-12-22 09:35:21,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:35:21,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:35:21,889 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 09:35:21,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:35:21,890 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:35:21,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:35:21,890 INFO L82 PathProgramCache]: Analyzing trace with hash -791645332, now seen corresponding path program 1 times [2020-12-22 09:35:21,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:35:21,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602897685] [2020-12-22 09:35:21,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:35:21,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:22,443 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 09:35:22,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602897685] [2020-12-22 09:35:22,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379950070] [2020-12-22 09:35:22,444 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 09:35:22,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:22,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 09:35:22,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:35:23,397 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:35:23,411 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:35:23,413 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:35:23,417 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:35:23,901 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 09:35:23,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:35:23,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2020-12-22 09:35:23,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27724931] [2020-12-22 09:35:23,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 09:35:23,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:35:23,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 09:35:23,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2020-12-22 09:35:23,904 INFO L87 Difference]: Start difference. First operand 6915 states and 9073 transitions. Second operand 26 states. [2020-12-22 09:35:24,614 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:35:24,775 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2020-12-22 09:35:24,978 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-12-22 09:35:25,283 WARN L197 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2020-12-22 09:35:25,542 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-22 09:35:25,804 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-22 09:35:26,078 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-22 09:35:26,354 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-22 09:35:26,647 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2020-12-22 09:35:26,951 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-12-22 09:35:27,178 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-22 09:35:27,350 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:35:27,556 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-12-22 09:35:28,076 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-12-22 09:35:28,504 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-12-22 09:35:28,703 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-12-22 09:35:29,023 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 09:35:29,329 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-12-22 09:35:29,656 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-12-22 09:35:29,816 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-12-22 09:35:30,261 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-12-22 09:35:30,996 WARN L197 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-12-22 09:35:31,422 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-12-22 09:35:31,757 WARN L197 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-12-22 09:35:32,001 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-12-22 09:35:32,307 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-12-22 09:35:32,537 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-22 09:35:32,768 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-12-22 09:35:33,055 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2020-12-22 09:35:33,239 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-12-22 09:35:33,656 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2020-12-22 09:35:35,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:35:35,613 INFO L93 Difference]: Finished difference Result 13221 states and 16908 transitions. [2020-12-22 09:35:35,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-22 09:35:35,614 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 67 [2020-12-22 09:35:35,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:35:35,626 INFO L225 Difference]: With dead ends: 13221 [2020-12-22 09:35:35,626 INFO L226 Difference]: Without dead ends: 10406 [2020-12-22 09:35:35,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2087 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=1298, Invalid=6358, Unknown=0, NotChecked=0, Total=7656 [2020-12-22 09:35:35,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10406 states. [2020-12-22 09:35:36,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10406 to 6157. [2020-12-22 09:35:36,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6157 states. [2020-12-22 09:35:36,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6157 states to 6157 states and 8188 transitions. [2020-12-22 09:35:36,247 INFO L78 Accepts]: Start accepts. Automaton has 6157 states and 8188 transitions. Word has length 67 [2020-12-22 09:35:36,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:35:36,247 INFO L481 AbstractCegarLoop]: Abstraction has 6157 states and 8188 transitions. [2020-12-22 09:35:36,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 09:35:36,247 INFO L276 IsEmpty]: Start isEmpty. Operand 6157 states and 8188 transitions. [2020-12-22 09:35:36,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:35:36,248 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:35:36,248 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 09:35:36,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 09:35:36,454 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:35:36,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:35:36,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1641009586, now seen corresponding path program 1 times [2020-12-22 09:35:36,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:35:36,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370375790] [2020-12-22 09:35:36,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:35:36,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:36,895 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 09:35:36,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370375790] [2020-12-22 09:35:36,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333648159] [2020-12-22 09:35:36,896 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 09:35:37,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:37,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 09:35:37,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:35:37,259 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:35:37,924 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 09:35:37,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:35:37,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2020-12-22 09:35:37,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345579094] [2020-12-22 09:35:37,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 09:35:37,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:35:37,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 09:35:37,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:35:37,926 INFO L87 Difference]: Start difference. First operand 6157 states and 8188 transitions. Second operand 22 states. [2020-12-22 09:35:38,230 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 21 [2020-12-22 09:35:38,385 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-12-22 09:35:38,558 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-12-22 09:35:39,447 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2020-12-22 09:35:39,712 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-12-22 09:35:39,874 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 30 [2020-12-22 09:35:40,091 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-12-22 09:35:40,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:35:40,826 INFO L93 Difference]: Finished difference Result 9399 states and 12281 transitions. [2020-12-22 09:35:40,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 09:35:40,828 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-12-22 09:35:40,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:35:40,838 INFO L225 Difference]: With dead ends: 9399 [2020-12-22 09:35:40,838 INFO L226 Difference]: Without dead ends: 7213 [2020-12-22 09:35:40,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=275, Invalid=985, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:35:40,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7213 states. [2020-12-22 09:35:41,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7213 to 5165. [2020-12-22 09:35:41,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5165 states. [2020-12-22 09:35:41,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5165 states to 5165 states and 6962 transitions. [2020-12-22 09:35:41,307 INFO L78 Accepts]: Start accepts. Automaton has 5165 states and 6962 transitions. Word has length 67 [2020-12-22 09:35:41,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:35:41,307 INFO L481 AbstractCegarLoop]: Abstraction has 5165 states and 6962 transitions. [2020-12-22 09:35:41,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 09:35:41,308 INFO L276 IsEmpty]: Start isEmpty. Operand 5165 states and 6962 transitions. [2020-12-22 09:35:41,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:35:41,309 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:35:41,309 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 09:35:41,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:35:41,523 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:35:41,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:35:41,524 INFO L82 PathProgramCache]: Analyzing trace with hash -2141886399, now seen corresponding path program 1 times [2020-12-22 09:35:41,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:35:41,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339747510] [2020-12-22 09:35:41,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:35:41,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:42,039 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 09:35:42,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339747510] [2020-12-22 09:35:42,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859879360] [2020-12-22 09:35:42,039 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 09:35:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:42,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 09:35:42,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:35:44,072 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 09:35:44,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:35:44,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2020-12-22 09:35:44,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017845071] [2020-12-22 09:35:44,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 09:35:44,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:35:44,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 09:35:44,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2020-12-22 09:35:44,076 INFO L87 Difference]: Start difference. First operand 5165 states and 6962 transitions. Second operand 32 states. [2020-12-22 09:35:45,223 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 09:35:45,375 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2020-12-22 09:35:46,779 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-12-22 09:35:47,135 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-12-22 09:35:48,953 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:35:49,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:35:49,648 INFO L93 Difference]: Finished difference Result 8559 states and 11263 transitions. [2020-12-22 09:35:49,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 09:35:49,649 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 68 [2020-12-22 09:35:49,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:35:49,655 INFO L225 Difference]: With dead ends: 8559 [2020-12-22 09:35:49,655 INFO L226 Difference]: Without dead ends: 6639 [2020-12-22 09:35:49,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1070, Invalid=4042, Unknown=0, NotChecked=0, Total=5112 [2020-12-22 09:35:49,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6639 states. [2020-12-22 09:35:49,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6639 to 4215. [2020-12-22 09:35:49,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4215 states. [2020-12-22 09:35:49,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4215 states to 4215 states and 5798 transitions. [2020-12-22 09:35:49,998 INFO L78 Accepts]: Start accepts. Automaton has 4215 states and 5798 transitions. Word has length 68 [2020-12-22 09:35:49,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:35:49,998 INFO L481 AbstractCegarLoop]: Abstraction has 4215 states and 5798 transitions. [2020-12-22 09:35:49,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 09:35:49,998 INFO L276 IsEmpty]: Start isEmpty. Operand 4215 states and 5798 transitions. [2020-12-22 09:35:49,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 09:35:49,999 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:35:50,000 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:35:50,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 09:35:50,213 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:35:50,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:35:50,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1410105670, now seen corresponding path program 1 times [2020-12-22 09:35:50,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:35:50,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010102778] [2020-12-22 09:35:50,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:35:50,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:50,317 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:35:50,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010102778] [2020-12-22 09:35:50,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548354318] [2020-12-22 09:35:50,317 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 09:35:50,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:50,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 09:35:50,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:35:50,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:35:50,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 09:35:50,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2020-12-22 09:35:50,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641352365] [2020-12-22 09:35:50,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:35:50,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:35:50,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:35:50,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:35:50,517 INFO L87 Difference]: Start difference. First operand 4215 states and 5798 transitions. Second operand 3 states. [2020-12-22 09:35:57,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:35:57,658 INFO L93 Difference]: Finished difference Result 7221 states and 10725 transitions. [2020-12-22 09:35:57,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:35:57,659 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 09:35:57,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:35:57,665 INFO L225 Difference]: With dead ends: 7221 [2020-12-22 09:35:57,666 INFO L226 Difference]: Without dead ends: 5717 [2020-12-22 09:35:57,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:35:57,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5717 states. [2020-12-22 09:35:58,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5717 to 5717. [2020-12-22 09:35:58,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5717 states. [2020-12-22 09:35:58,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5717 states to 5717 states and 7618 transitions. [2020-12-22 09:35:58,123 INFO L78 Accepts]: Start accepts. Automaton has 5717 states and 7618 transitions. Word has length 91 [2020-12-22 09:35:58,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:35:58,124 INFO L481 AbstractCegarLoop]: Abstraction has 5717 states and 7618 transitions. [2020-12-22 09:35:58,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:35:58,124 INFO L276 IsEmpty]: Start isEmpty. Operand 5717 states and 7618 transitions. [2020-12-22 09:35:58,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:35:58,125 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:35:58,125 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:35:58,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 09:35:58,326 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:35:58,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:35:58,327 INFO L82 PathProgramCache]: Analyzing trace with hash 213880004, now seen corresponding path program 1 times [2020-12-22 09:35:58,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:35:58,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797910272] [2020-12-22 09:35:58,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:35:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:58,391 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:35:58,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797910272] [2020-12-22 09:35:58,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:35:58,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:35:58,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335028295] [2020-12-22 09:35:58,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:35:58,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:35:58,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:35:58,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:35:58,393 INFO L87 Difference]: Start difference. First operand 5717 states and 7618 transitions. Second operand 3 states. [2020-12-22 09:36:05,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:36:05,411 INFO L93 Difference]: Finished difference Result 11727 states and 16185 transitions. [2020-12-22 09:36:05,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:36:05,412 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 09:36:05,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:36:05,421 INFO L225 Difference]: With dead ends: 11727 [2020-12-22 09:36:05,421 INFO L226 Difference]: Without dead ends: 8721 [2020-12-22 09:36:05,425 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 09:36:05,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8721 states. [2020-12-22 09:36:05,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8721 to 8721. [2020-12-22 09:36:05,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8721 states. [2020-12-22 09:36:05,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8721 states to 8721 states and 11115 transitions. [2020-12-22 09:36:05,804 INFO L78 Accepts]: Start accepts. Automaton has 8721 states and 11115 transitions. Word has length 95 [2020-12-22 09:36:05,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:36:05,804 INFO L481 AbstractCegarLoop]: Abstraction has 8721 states and 11115 transitions. [2020-12-22 09:36:05,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:36:05,804 INFO L276 IsEmpty]: Start isEmpty. Operand 8721 states and 11115 transitions. [2020-12-22 09:36:05,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-22 09:36:05,806 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:36:05,806 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:36:05,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 09:36:05,807 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:36:05,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:36:05,807 INFO L82 PathProgramCache]: Analyzing trace with hash 957956051, now seen corresponding path program 1 times [2020-12-22 09:36:05,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:36:05,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427268126] [2020-12-22 09:36:05,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:36:05,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:36:05,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:36:05,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427268126] [2020-12-22 09:36:05,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:36:05,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:36:05,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112462182] [2020-12-22 09:36:05,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:36:05,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:36:05,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:36:05,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:36:05,949 INFO L87 Difference]: Start difference. First operand 8721 states and 11115 transitions. Second operand 3 states. [2020-12-22 09:36:13,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:36:13,486 INFO L93 Difference]: Finished difference Result 20741 states and 26677 transitions. [2020-12-22 09:36:13,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:36:13,487 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 101 [2020-12-22 09:36:13,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:36:13,502 INFO L225 Difference]: With dead ends: 20741 [2020-12-22 09:36:13,502 INFO L226 Difference]: Without dead ends: 14731 [2020-12-22 09:36:13,508 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 09:36:13,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14731 states. [2020-12-22 09:36:13,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14731 to 13978. [2020-12-22 09:36:13,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13978 states. [2020-12-22 09:36:13,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13978 states to 13978 states and 17166 transitions. [2020-12-22 09:36:13,961 INFO L78 Accepts]: Start accepts. Automaton has 13978 states and 17166 transitions. Word has length 101 [2020-12-22 09:36:13,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:36:13,961 INFO L481 AbstractCegarLoop]: Abstraction has 13978 states and 17166 transitions. [2020-12-22 09:36:13,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:36:13,962 INFO L276 IsEmpty]: Start isEmpty. Operand 13978 states and 17166 transitions. [2020-12-22 09:36:13,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 09:36:13,964 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:36:13,964 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 09:36:13,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 09:36:13,965 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:36:13,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:36:13,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1538014726, now seen corresponding path program 1 times [2020-12-22 09:36:13,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:36:13,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729175737] [2020-12-22 09:36:13,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:36:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:36:14,347 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 09:36:14,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729175737] [2020-12-22 09:36:14,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142774201] [2020-12-22 09:36:14,348 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 09:36:14,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:36:14,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 09:36:14,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:36:15,162 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:36:15,618 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 09:36:15,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:36:15,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2020-12-22 09:36:15,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285822817] [2020-12-22 09:36:15,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 09:36:15,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:36:15,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 09:36:15,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-12-22 09:36:15,620 INFO L87 Difference]: Start difference. First operand 13978 states and 17166 transitions. Second operand 23 states. [2020-12-22 09:36:16,008 WARN L197 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2020-12-22 09:36:16,725 WARN L197 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-12-22 09:36:17,155 WARN L197 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2020-12-22 09:36:17,649 WARN L197 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2020-12-22 09:36:18,065 WARN L197 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2020-12-22 09:36:18,630 WARN L197 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2020-12-22 09:36:19,208 WARN L197 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2020-12-22 09:36:20,007 WARN L197 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2020-12-22 09:36:20,674 WARN L197 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2020-12-22 09:36:21,561 WARN L197 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 91 [2020-12-22 09:36:22,235 WARN L197 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 88 [2020-12-22 09:36:22,874 WARN L197 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 86 [2020-12-22 09:36:23,566 WARN L197 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2020-12-22 09:36:24,164 WARN L197 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 83 [2020-12-22 09:36:25,000 WARN L197 SmtUtils]: Spent 759.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 91 [2020-12-22 09:36:26,014 WARN L197 SmtUtils]: Spent 926.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 99 [2020-12-22 09:36:27,044 WARN L197 SmtUtils]: Spent 953.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 99 [2020-12-22 09:36:28,141 WARN L197 SmtUtils]: Spent 976.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 99 [2020-12-22 09:36:29,586 WARN L197 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 116 DAG size of output: 99 [2020-12-22 09:36:30,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:36:30,282 INFO L93 Difference]: Finished difference Result 16352 states and 20153 transitions. [2020-12-22 09:36:30,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 09:36:30,284 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 110 [2020-12-22 09:36:30,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:36:30,300 INFO L225 Difference]: With dead ends: 16352 [2020-12-22 09:36:30,300 INFO L226 Difference]: Without dead ends: 14196 [2020-12-22 09:36:30,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=471, Invalid=1599, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 09:36:30,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14196 states. [2020-12-22 09:36:30,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14196 to 13978. [2020-12-22 09:36:30,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13978 states. [2020-12-22 09:36:30,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13978 states to 13978 states and 17114 transitions. [2020-12-22 09:36:30,948 INFO L78 Accepts]: Start accepts. Automaton has 13978 states and 17114 transitions. Word has length 110 [2020-12-22 09:36:30,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:36:30,948 INFO L481 AbstractCegarLoop]: Abstraction has 13978 states and 17114 transitions. [2020-12-22 09:36:30,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 09:36:30,948 INFO L276 IsEmpty]: Start isEmpty. Operand 13978 states and 17114 transitions. [2020-12-22 09:36:30,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 09:36:30,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:36:30,951 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 09:36:31,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 09:36:31,165 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:36:31,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:36:31,166 INFO L82 PathProgramCache]: Analyzing trace with hash -721276639, now seen corresponding path program 1 times [2020-12-22 09:36:31,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:36:31,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17517249] [2020-12-22 09:36:31,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:36:31,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:36:31,771 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 09:36:31,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17517249] [2020-12-22 09:36:31,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179108576] [2020-12-22 09:36:31,772 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 09:36:31,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:36:31,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 09:36:31,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:36:32,515 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:36:33,276 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:36:33,552 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 34 [2020-12-22 09:36:34,451 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 09:36:34,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:36:34,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19] total 29 [2020-12-22 09:36:34,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942038550] [2020-12-22 09:36:34,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 09:36:34,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:36:34,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 09:36:34,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2020-12-22 09:36:34,453 INFO L87 Difference]: Start difference. First operand 13978 states and 17114 transitions. Second operand 30 states. [2020-12-22 09:36:34,628 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 09:36:35,089 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-22 09:36:35,312 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-22 09:36:35,711 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:36:35,953 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-12-22 09:36:36,264 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-22 09:36:36,504 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-22 09:36:36,779 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-12-22 09:36:37,081 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2020-12-22 09:36:37,473 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2020-12-22 09:36:37,719 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-12-22 09:36:37,967 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-12-22 09:36:38,409 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-12-22 09:36:38,987 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-12-22 09:36:39,501 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-12-22 09:36:39,840 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2020-12-22 09:36:40,352 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-12-22 09:36:40,753 WARN L197 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-12-22 09:36:40,918 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2020-12-22 09:36:41,162 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-12-22 09:36:41,474 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-22 09:36:41,821 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-12-22 09:36:42,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:36:42,416 INFO L93 Difference]: Finished difference Result 16070 states and 19705 transitions. [2020-12-22 09:36:42,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 09:36:42,418 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 111 [2020-12-22 09:36:42,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:36:42,432 INFO L225 Difference]: With dead ends: 16070 [2020-12-22 09:36:42,432 INFO L226 Difference]: Without dead ends: 14552 [2020-12-22 09:36:42,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=614, Invalid=2926, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 09:36:42,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14552 states. [2020-12-22 09:36:43,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14552 to 13978. [2020-12-22 09:36:43,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13978 states. [2020-12-22 09:36:43,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13978 states to 13978 states and 17088 transitions. [2020-12-22 09:36:43,192 INFO L78 Accepts]: Start accepts. Automaton has 13978 states and 17088 transitions. Word has length 111 [2020-12-22 09:36:43,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:36:43,192 INFO L481 AbstractCegarLoop]: Abstraction has 13978 states and 17088 transitions. [2020-12-22 09:36:43,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 09:36:43,192 INFO L276 IsEmpty]: Start isEmpty. Operand 13978 states and 17088 transitions. [2020-12-22 09:36:43,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 09:36:43,195 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:36:43,195 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 09:36:43,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:36:43,409 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:36:43,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:36:43,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1699429479, now seen corresponding path program 1 times [2020-12-22 09:36:43,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:36:43,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579305479] [2020-12-22 09:36:43,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:36:43,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:36:45,001 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 09:36:45,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579305479] [2020-12-22 09:36:45,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562629373] [2020-12-22 09:36:45,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:36:45,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:36:45,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 09:36:45,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:36:46,007 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:36:46,377 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:36:46,951 WARN L197 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 46 [2020-12-22 09:36:46,968 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:36:47,267 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-12-22 09:36:47,278 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:36:47,748 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 09:36:47,765 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:36:47,784 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:36:56,343 WARN L197 SmtUtils]: Spent 3.92 s on a formula simplification. DAG size of input: 346 DAG size of output: 45 [2020-12-22 09:36:58,165 WARN L197 SmtUtils]: Spent 674.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-22 09:36:59,659 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-22 09:36:59,871 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 09:36:59,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:36:59,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18] total 39 [2020-12-22 09:36:59,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856612425] [2020-12-22 09:36:59,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 09:36:59,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:36:59,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 09:36:59,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 09:36:59,874 INFO L87 Difference]: Start difference. First operand 13978 states and 17088 transitions. Second operand 39 states. [2020-12-22 09:37:00,296 WARN L197 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-12-22 09:37:01,655 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2020-12-22 09:37:01,955 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-22 09:37:02,457 WARN L197 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-12-22 09:37:02,991 WARN L197 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-12-22 09:37:03,377 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-12-22 09:37:03,801 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-12-22 09:37:04,374 WARN L197 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-12-22 09:37:04,869 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-22 09:37:05,539 WARN L197 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2020-12-22 09:37:06,437 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-12-22 09:37:07,105 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2020-12-22 09:37:08,320 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2020-12-22 09:37:13,048 WARN L197 SmtUtils]: Spent 2.69 s on a formula simplification. DAG size of input: 99 DAG size of output: 81 [2020-12-22 09:37:13,562 WARN L197 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2020-12-22 09:37:19,859 WARN L197 SmtUtils]: Spent 3.82 s on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-12-22 09:37:24,329 WARN L197 SmtUtils]: Spent 2.66 s on a formula simplification. DAG size of input: 93 DAG size of output: 78 [2020-12-22 09:37:24,593 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-12-22 09:37:26,931 WARN L197 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 72 [2020-12-22 09:37:32,034 WARN L197 SmtUtils]: Spent 2.34 s on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-12-22 09:37:37,301 WARN L197 SmtUtils]: Spent 2.90 s on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2020-12-22 09:37:40,991 WARN L197 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 75 [2020-12-22 09:37:44,300 WARN L197 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 58 [2020-12-22 09:37:48,545 WARN L197 SmtUtils]: Spent 1.86 s on a formula simplification that was a NOOP. DAG size: 75 [2020-12-22 09:37:48,793 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 09:37:54,330 WARN L197 SmtUtils]: Spent 3.40 s on a formula simplification that was a NOOP. DAG size: 58 [2020-12-22 09:37:54,622 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 09:37:55,411 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 09:37:57,733 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-12-22 09:38:02,360 WARN L197 SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-12-22 09:38:02,861 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-22 09:38:06,711 WARN L197 SmtUtils]: Spent 1.36 s on a formula simplification that was a NOOP. DAG size: 63 [2020-12-22 09:38:11,531 WARN L197 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 75 [2020-12-22 09:38:13,928 WARN L197 SmtUtils]: Spent 829.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-12-22 09:38:16,389 WARN L197 SmtUtils]: Spent 712.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-12-22 09:38:20,727 WARN L197 SmtUtils]: Spent 1.38 s on a formula simplification that was a NOOP. DAG size: 58 [2020-12-22 09:38:24,485 WARN L197 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 66 [2020-12-22 09:38:25,079 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-12-22 09:38:28,074 WARN L197 SmtUtils]: Spent 684.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-12-22 09:38:32,762 WARN L197 SmtUtils]: Spent 1.67 s on a formula simplification that was a NOOP. DAG size: 66