/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.6.ufo.BOUNDED-12.pals+Problem12_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:04:21,692 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:04:21,696 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:04:21,754 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:04:21,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:04:21,760 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:04:21,764 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:04:21,774 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:04:21,777 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:04:21,786 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:04:21,787 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:04:21,788 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:04:21,789 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:04:21,792 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:04:21,794 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:04:21,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:04:21,798 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:04:21,802 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:04:21,810 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:04:21,828 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:04:21,833 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:04:21,834 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:04:21,836 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:04:21,837 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:04:21,842 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:04:21,854 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:04:21,855 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:04:21,856 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:04:21,857 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:04:21,903 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:04:21,904 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:04:21,908 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:04:21,908 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:04:21,909 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:04:21,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:04:21,909 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:04:21,909 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:04:21,910 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:04:21,910 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:04:21,911 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:04:21,911 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:04:21,911 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:04:21,912 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:04:21,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:04:21,912 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:04:21,912 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:04:21,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:04:21,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:04:21,913 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:04:21,913 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:04:21,913 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:04:21,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:04:21,914 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:04:21,914 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:04:21,914 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:04:22,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:04:22,419 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:04:22,423 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:04:22,425 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:04:22,426 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:04:22,427 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label06.c [2020-12-22 10:04:22,520 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dcb316a9/b79267342f1d4d63b98bb6f0f10a87e9/FLAG8984a98f5 [2020-12-22 10:04:23,559 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:04:23,560 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label06.c [2020-12-22 10:04:23,603 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dcb316a9/b79267342f1d4d63b98bb6f0f10a87e9/FLAG8984a98f5 [2020-12-22 10:04:24,042 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dcb316a9/b79267342f1d4d63b98bb6f0f10a87e9 [2020-12-22 10:04:24,045 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:04:24,048 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:04:24,051 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:04:24,051 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:04:24,055 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:04:24,056 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:04:24" (1/1) ... [2020-12-22 10:04:24,058 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b55cd2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:24, skipping insertion in model container [2020-12-22 10:04:24,058 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:04:24" (1/1) ... [2020-12-22 10:04:24,067 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:04:24,243 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:04:24,791 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.6.ufo.BOUNDED-12.pals+Problem12_label06.c[15586,15599] [2020-12-22 10:04:24,857 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.6.ufo.BOUNDED-12.pals+Problem12_label06.c[18160,18173] [2020-12-22 10:04:25,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:04:25,911 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:04:25,991 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.6.ufo.BOUNDED-12.pals+Problem12_label06.c[15586,15599] [2020-12-22 10:04:26,004 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.6.ufo.BOUNDED-12.pals+Problem12_label06.c[18160,18173] [2020-12-22 10:04:26,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:04:26,710 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:04:26,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:26 WrapperNode [2020-12-22 10:04:26,711 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:04:26,713 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:04:26,713 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:04:26,713 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:04:26,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:26" (1/1) ... [2020-12-22 10:04:26,800 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:26" (1/1) ... [2020-12-22 10:04:27,150 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:04:27,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:04:27,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:04:27,152 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:04:27,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:26" (1/1) ... [2020-12-22 10:04:27,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:26" (1/1) ... [2020-12-22 10:04:27,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:26" (1/1) ... [2020-12-22 10:04:27,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:26" (1/1) ... [2020-12-22 10:04:27,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:26" (1/1) ... [2020-12-22 10:04:27,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:26" (1/1) ... [2020-12-22 10:04:27,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:26" (1/1) ... [2020-12-22 10:04:27,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:04:27,837 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:04:27,838 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:04:27,838 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:04:27,839 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:04:27,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:04:27,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:04:27,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:04:27,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:04:33,476 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:04:33,477 INFO L299 CfgBuilder]: Removed 38 assume(true) statements. [2020-12-22 10:04:33,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:04:33 BoogieIcfgContainer [2020-12-22 10:04:33,481 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:04:33,483 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:04:33,483 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:04:33,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:04:33,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:04:24" (1/3) ... [2020-12-22 10:04:33,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@692eb37a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:04:33, skipping insertion in model container [2020-12-22 10:04:33,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:26" (2/3) ... [2020-12-22 10:04:33,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@692eb37a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:04:33, skipping insertion in model container [2020-12-22 10:04:33,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:04:33" (3/3) ... [2020-12-22 10:04:33,491 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label06.c [2020-12-22 10:04:33,498 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:04:33,505 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:04:33,527 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:04:33,563 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:04:33,564 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:04:33,564 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:04:33,564 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:04:33,564 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:04:33,564 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:04:33,564 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:04:33,565 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:04:33,601 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states. [2020-12-22 10:04:33,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 10:04:33,610 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:33,611 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] [2020-12-22 10:04:33,611 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:33,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:33,619 INFO L82 PathProgramCache]: Analyzing trace with hash -407855243, now seen corresponding path program 1 times [2020-12-22 10:04:33,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:33,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317961444] [2020-12-22 10:04:33,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:33,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:33,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:04:33,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317961444] [2020-12-22 10:04:33,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:33,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:04:33,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296086391] [2020-12-22 10:04:33,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:33,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:33,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:33,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:33,979 INFO L87 Difference]: Start difference. First operand 926 states. Second operand 3 states. [2020-12-22 10:04:40,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:40,449 INFO L93 Difference]: Finished difference Result 2561 states and 4920 transitions. [2020-12-22 10:04:40,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:40,453 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-12-22 10:04:40,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:40,496 INFO L225 Difference]: With dead ends: 2561 [2020-12-22 10:04:40,497 INFO L226 Difference]: Without dead ends: 1611 [2020-12-22 10:04:40,508 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 10:04:40,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2020-12-22 10:04:40,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1611. [2020-12-22 10:04:40,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1611 states. [2020-12-22 10:04:40,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 2959 transitions. [2020-12-22 10:04:40,675 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 2959 transitions. Word has length 24 [2020-12-22 10:04:40,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:40,676 INFO L481 AbstractCegarLoop]: Abstraction has 1611 states and 2959 transitions. [2020-12-22 10:04:40,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:40,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 2959 transitions. [2020-12-22 10:04:40,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 10:04:40,680 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:40,680 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] [2020-12-22 10:04:40,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:04:40,681 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:40,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:40,682 INFO L82 PathProgramCache]: Analyzing trace with hash 615382892, now seen corresponding path program 1 times [2020-12-22 10:04:40,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:40,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997137264] [2020-12-22 10:04:40,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:04:40,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997137264] [2020-12-22 10:04:40,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:40,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:04:40,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448740416] [2020-12-22 10:04:40,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:04:40,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:40,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:04:40,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:04:40,829 INFO L87 Difference]: Start difference. First operand 1611 states and 2959 transitions. Second operand 5 states. [2020-12-22 10:04:40,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:40,981 INFO L93 Difference]: Finished difference Result 1675 states and 3058 transitions. [2020-12-22 10:04:40,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:04:40,982 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-12-22 10:04:40,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:40,994 INFO L225 Difference]: With dead ends: 1675 [2020-12-22 10:04:40,994 INFO L226 Difference]: Without dead ends: 1611 [2020-12-22 10:04:40,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:04:41,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2020-12-22 10:04:41,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1611. [2020-12-22 10:04:41,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1611 states. [2020-12-22 10:04:41,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 2919 transitions. [2020-12-22 10:04:41,056 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 2919 transitions. Word has length 38 [2020-12-22 10:04:41,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:41,057 INFO L481 AbstractCegarLoop]: Abstraction has 1611 states and 2919 transitions. [2020-12-22 10:04:41,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:04:41,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 2919 transitions. [2020-12-22 10:04:41,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:04:41,061 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:41,061 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:41,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:04:41,061 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:41,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:41,062 INFO L82 PathProgramCache]: Analyzing trace with hash -2101054792, now seen corresponding path program 1 times [2020-12-22 10:04:41,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:41,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338116070] [2020-12-22 10:04:41,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:41,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:41,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:04:41,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338116070] [2020-12-22 10:04:41,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:41,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:41,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167541633] [2020-12-22 10:04:41,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:41,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:41,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:41,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:41,266 INFO L87 Difference]: Start difference. First operand 1611 states and 2919 transitions. Second operand 3 states. [2020-12-22 10:04:41,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:41,318 INFO L93 Difference]: Finished difference Result 1725 states and 3099 transitions. [2020-12-22 10:04:41,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:41,319 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:04:41,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:41,332 INFO L225 Difference]: With dead ends: 1725 [2020-12-22 10:04:41,333 INFO L226 Difference]: Without dead ends: 1665 [2020-12-22 10:04:41,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:41,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2020-12-22 10:04:41,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1663. [2020-12-22 10:04:41,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1663 states. [2020-12-22 10:04:41,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 3002 transitions. [2020-12-22 10:04:41,406 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 3002 transitions. Word has length 77 [2020-12-22 10:04:41,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:41,408 INFO L481 AbstractCegarLoop]: Abstraction has 1663 states and 3002 transitions. [2020-12-22 10:04:41,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:41,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 3002 transitions. [2020-12-22 10:04:41,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:04:41,416 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:41,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:41,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:04:41,417 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:41,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:41,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1452480302, now seen corresponding path program 1 times [2020-12-22 10:04:41,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:41,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545495824] [2020-12-22 10:04:41,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:41,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:04:41,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545495824] [2020-12-22 10:04:41,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:41,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:41,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761809262] [2020-12-22 10:04:41,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:41,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:41,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:41,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:41,572 INFO L87 Difference]: Start difference. First operand 1663 states and 3002 transitions. Second operand 3 states. [2020-12-22 10:04:41,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:41,617 INFO L93 Difference]: Finished difference Result 1875 states and 3338 transitions. [2020-12-22 10:04:41,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:41,621 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:04:41,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:41,636 INFO L225 Difference]: With dead ends: 1875 [2020-12-22 10:04:41,637 INFO L226 Difference]: Without dead ends: 1763 [2020-12-22 10:04:41,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:41,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2020-12-22 10:04:41,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1761. [2020-12-22 10:04:41,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1761 states. [2020-12-22 10:04:41,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 3157 transitions. [2020-12-22 10:04:41,762 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 3157 transitions. Word has length 77 [2020-12-22 10:04:41,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:41,764 INFO L481 AbstractCegarLoop]: Abstraction has 1761 states and 3157 transitions. [2020-12-22 10:04:41,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:41,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 3157 transitions. [2020-12-22 10:04:41,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:04:41,766 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:41,767 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:41,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:04:41,767 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:41,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:41,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1624501596, now seen corresponding path program 1 times [2020-12-22 10:04:41,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:41,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285036638] [2020-12-22 10:04:41,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:42,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:04:42,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285036638] [2020-12-22 10:04:42,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:42,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:04:42,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939166120] [2020-12-22 10:04:42,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:04:42,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:42,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:04:42,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:04:42,020 INFO L87 Difference]: Start difference. First operand 1761 states and 3157 transitions. Second operand 8 states. [2020-12-22 10:04:42,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:42,532 INFO L93 Difference]: Finished difference Result 4281 states and 7153 transitions. [2020-12-22 10:04:42,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:04:42,533 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-12-22 10:04:42,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:42,564 INFO L225 Difference]: With dead ends: 4281 [2020-12-22 10:04:42,565 INFO L226 Difference]: Without dead ends: 4071 [2020-12-22 10:04:42,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:04:42,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4071 states. [2020-12-22 10:04:42,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4071 to 1969. [2020-12-22 10:04:42,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1969 states. [2020-12-22 10:04:42,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 3481 transitions. [2020-12-22 10:04:42,701 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 3481 transitions. Word has length 77 [2020-12-22 10:04:42,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:42,701 INFO L481 AbstractCegarLoop]: Abstraction has 1969 states and 3481 transitions. [2020-12-22 10:04:42,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:04:42,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 3481 transitions. [2020-12-22 10:04:42,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:04:42,706 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:42,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:42,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:04:42,707 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:42,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:42,708 INFO L82 PathProgramCache]: Analyzing trace with hash 806369108, now seen corresponding path program 1 times [2020-12-22 10:04:42,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:42,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614954050] [2020-12-22 10:04:42,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:42,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:42,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:04:42,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614954050] [2020-12-22 10:04:42,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:42,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:42,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167409403] [2020-12-22 10:04:42,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:42,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:42,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:42,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:42,836 INFO L87 Difference]: Start difference. First operand 1969 states and 3481 transitions. Second operand 3 states. [2020-12-22 10:04:42,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:42,921 INFO L93 Difference]: Finished difference Result 2589 states and 4453 transitions. [2020-12-22 10:04:42,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:42,922 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:04:42,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:42,938 INFO L225 Difference]: With dead ends: 2589 [2020-12-22 10:04:42,938 INFO L226 Difference]: Without dead ends: 2171 [2020-12-22 10:04:42,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:42,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2020-12-22 10:04:43,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2169. [2020-12-22 10:04:43,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2169 states. [2020-12-22 10:04:43,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 3789 transitions. [2020-12-22 10:04:43,039 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 3789 transitions. Word has length 79 [2020-12-22 10:04:43,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:43,041 INFO L481 AbstractCegarLoop]: Abstraction has 2169 states and 3789 transitions. [2020-12-22 10:04:43,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:43,041 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 3789 transitions. [2020-12-22 10:04:43,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:04:43,043 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:43,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:43,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:04:43,049 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:43,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:43,050 INFO L82 PathProgramCache]: Analyzing trace with hash 872862620, now seen corresponding path program 1 times [2020-12-22 10:04:43,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:43,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067992512] [2020-12-22 10:04:43,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:43,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:43,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:04:43,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067992512] [2020-12-22 10:04:43,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:43,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:04:43,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353323031] [2020-12-22 10:04:43,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:04:43,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:43,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:04:43,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:04:43,421 INFO L87 Difference]: Start difference. First operand 2169 states and 3789 transitions. Second operand 8 states. [2020-12-22 10:04:43,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:43,822 INFO L93 Difference]: Finished difference Result 2787 states and 4753 transitions. [2020-12-22 10:04:43,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:04:43,823 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-12-22 10:04:43,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:43,837 INFO L225 Difference]: With dead ends: 2787 [2020-12-22 10:04:43,837 INFO L226 Difference]: Without dead ends: 2171 [2020-12-22 10:04:43,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:04:43,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2020-12-22 10:04:43,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2169. [2020-12-22 10:04:43,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2169 states. [2020-12-22 10:04:43,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 3783 transitions. [2020-12-22 10:04:43,935 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 3783 transitions. Word has length 79 [2020-12-22 10:04:43,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:43,935 INFO L481 AbstractCegarLoop]: Abstraction has 2169 states and 3783 transitions. [2020-12-22 10:04:43,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:04:43,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 3783 transitions. [2020-12-22 10:04:43,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:04:43,943 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:43,943 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:43,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:04:43,944 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:43,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:43,944 INFO L82 PathProgramCache]: Analyzing trace with hash -385682984, now seen corresponding path program 1 times [2020-12-22 10:04:43,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:43,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18142738] [2020-12-22 10:04:43,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:43,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:44,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:04:44,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18142738] [2020-12-22 10:04:44,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:44,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:44,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971800502] [2020-12-22 10:04:44,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:44,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:44,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:44,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:44,053 INFO L87 Difference]: Start difference. First operand 2169 states and 3783 transitions. Second operand 3 states. [2020-12-22 10:04:44,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:44,163 INFO L93 Difference]: Finished difference Result 3329 states and 5577 transitions. [2020-12-22 10:04:44,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:44,164 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:04:44,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:44,182 INFO L225 Difference]: With dead ends: 3329 [2020-12-22 10:04:44,182 INFO L226 Difference]: Without dead ends: 2713 [2020-12-22 10:04:44,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:44,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2020-12-22 10:04:44,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2711. [2020-12-22 10:04:44,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2711 states. [2020-12-22 10:04:44,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 4607 transitions. [2020-12-22 10:04:44,318 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 4607 transitions. Word has length 79 [2020-12-22 10:04:44,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:44,318 INFO L481 AbstractCegarLoop]: Abstraction has 2711 states and 4607 transitions. [2020-12-22 10:04:44,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:44,318 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 4607 transitions. [2020-12-22 10:04:44,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:04:44,319 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:44,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:44,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:04:44,322 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:44,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:44,323 INFO L82 PathProgramCache]: Analyzing trace with hash -111995272, now seen corresponding path program 1 times [2020-12-22 10:04:44,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:44,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628729479] [2020-12-22 10:04:44,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:44,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:44,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:04:44,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628729479] [2020-12-22 10:04:44,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:44,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:44,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802459195] [2020-12-22 10:04:44,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:44,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:44,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:44,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:44,417 INFO L87 Difference]: Start difference. First operand 2711 states and 4607 transitions. Second operand 3 states. [2020-12-22 10:04:44,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:44,572 INFO L93 Difference]: Finished difference Result 4883 states and 7929 transitions. [2020-12-22 10:04:44,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:44,573 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:04:44,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:44,594 INFO L225 Difference]: With dead ends: 4883 [2020-12-22 10:04:44,594 INFO L226 Difference]: Without dead ends: 3725 [2020-12-22 10:04:44,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:44,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3725 states. [2020-12-22 10:04:44,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3725 to 3723. [2020-12-22 10:04:44,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3723 states. [2020-12-22 10:04:44,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3723 states to 3723 states and 6123 transitions. [2020-12-22 10:04:44,835 INFO L78 Accepts]: Start accepts. Automaton has 3723 states and 6123 transitions. Word has length 79 [2020-12-22 10:04:44,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:44,835 INFO L481 AbstractCegarLoop]: Abstraction has 3723 states and 6123 transitions. [2020-12-22 10:04:44,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:44,836 INFO L276 IsEmpty]: Start isEmpty. Operand 3723 states and 6123 transitions. [2020-12-22 10:04:44,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:04:44,837 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:44,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:44,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:04:44,837 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:44,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:44,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1707076376, now seen corresponding path program 1 times [2020-12-22 10:04:44,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:44,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616861873] [2020-12-22 10:04:44,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:04:44,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616861873] [2020-12-22 10:04:44,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:44,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:44,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554406076] [2020-12-22 10:04:44,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:44,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:44,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:44,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:44,914 INFO L87 Difference]: Start difference. First operand 3723 states and 6123 transitions. Second operand 3 states. [2020-12-22 10:04:45,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:45,197 INFO L93 Difference]: Finished difference Result 7775 states and 12237 transitions. [2020-12-22 10:04:45,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:45,198 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:04:45,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:45,240 INFO L225 Difference]: With dead ends: 7775 [2020-12-22 10:04:45,240 INFO L226 Difference]: Without dead ends: 5605 [2020-12-22 10:04:45,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:45,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5605 states. [2020-12-22 10:04:45,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5605 to 5603. [2020-12-22 10:04:45,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5603 states. [2020-12-22 10:04:45,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5603 states to 5603 states and 8891 transitions. [2020-12-22 10:04:45,580 INFO L78 Accepts]: Start accepts. Automaton has 5603 states and 8891 transitions. Word has length 79 [2020-12-22 10:04:45,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:45,581 INFO L481 AbstractCegarLoop]: Abstraction has 5603 states and 8891 transitions. [2020-12-22 10:04:45,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:45,581 INFO L276 IsEmpty]: Start isEmpty. Operand 5603 states and 8891 transitions. [2020-12-22 10:04:45,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:04:45,582 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:45,582 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:45,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:04:45,583 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:45,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:45,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1886482360, now seen corresponding path program 1 times [2020-12-22 10:04:45,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:45,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126011051] [2020-12-22 10:04:45,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:45,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:04:45,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126011051] [2020-12-22 10:04:45,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:45,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:45,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395037472] [2020-12-22 10:04:45,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:45,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:45,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:45,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:45,649 INFO L87 Difference]: Start difference. First operand 5603 states and 8891 transitions. Second operand 3 states. [2020-12-22 10:04:46,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:46,166 INFO L93 Difference]: Finished difference Result 13127 states and 20061 transitions. [2020-12-22 10:04:46,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:46,167 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:04:46,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:46,189 INFO L225 Difference]: With dead ends: 13127 [2020-12-22 10:04:46,189 INFO L226 Difference]: Without dead ends: 9077 [2020-12-22 10:04:46,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:46,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9077 states. [2020-12-22 10:04:46,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9077 to 9075. [2020-12-22 10:04:46,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9075 states. [2020-12-22 10:04:46,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9075 states to 9075 states and 13899 transitions. [2020-12-22 10:04:46,951 INFO L78 Accepts]: Start accepts. Automaton has 9075 states and 13899 transitions. Word has length 79 [2020-12-22 10:04:46,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:46,951 INFO L481 AbstractCegarLoop]: Abstraction has 9075 states and 13899 transitions. [2020-12-22 10:04:46,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:46,951 INFO L276 IsEmpty]: Start isEmpty. Operand 9075 states and 13899 transitions. [2020-12-22 10:04:46,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 10:04:46,952 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:46,953 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:46,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:04:46,953 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:46,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:46,954 INFO L82 PathProgramCache]: Analyzing trace with hash 874214487, now seen corresponding path program 1 times [2020-12-22 10:04:46,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:46,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222076323] [2020-12-22 10:04:46,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:46,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:47,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:04:47,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222076323] [2020-12-22 10:04:47,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:47,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:04:47,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244703242] [2020-12-22 10:04:47,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:04:47,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:47,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:04:47,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:04:47,092 INFO L87 Difference]: Start difference. First operand 9075 states and 13899 transitions. Second operand 8 states. [2020-12-22 10:04:48,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:48,369 INFO L93 Difference]: Finished difference Result 15538 states and 23170 transitions. [2020-12-22 10:04:48,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:04:48,370 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 80 [2020-12-22 10:04:48,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:48,405 INFO L225 Difference]: With dead ends: 15538 [2020-12-22 10:04:48,405 INFO L226 Difference]: Without dead ends: 15536 [2020-12-22 10:04:48,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:04:48,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15536 states. [2020-12-22 10:04:49,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15536 to 9459. [2020-12-22 10:04:49,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9459 states. [2020-12-22 10:04:49,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9459 states to 9459 states and 14251 transitions. [2020-12-22 10:04:49,226 INFO L78 Accepts]: Start accepts. Automaton has 9459 states and 14251 transitions. Word has length 80 [2020-12-22 10:04:49,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:49,227 INFO L481 AbstractCegarLoop]: Abstraction has 9459 states and 14251 transitions. [2020-12-22 10:04:49,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:04:49,227 INFO L276 IsEmpty]: Start isEmpty. Operand 9459 states and 14251 transitions. [2020-12-22 10:04:49,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:04:49,228 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:49,229 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:49,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:04:49,229 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:49,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:49,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1948928744, now seen corresponding path program 1 times [2020-12-22 10:04:49,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:49,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388501679] [2020-12-22 10:04:49,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:49,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:49,359 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:04:49,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388501679] [2020-12-22 10:04:49,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:49,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:49,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058188268] [2020-12-22 10:04:49,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:04:49,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:49,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:04:49,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:04:49,361 INFO L87 Difference]: Start difference. First operand 9459 states and 14251 transitions. Second operand 4 states. [2020-12-22 10:05:00,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:00,815 INFO L93 Difference]: Finished difference Result 13216 states and 21141 transitions. [2020-12-22 10:05:00,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:05:00,816 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2020-12-22 10:05:00,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:00,840 INFO L225 Difference]: With dead ends: 13216 [2020-12-22 10:05:00,841 INFO L226 Difference]: Without dead ends: 11712 [2020-12-22 10:05:00,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:05:00,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11712 states. [2020-12-22 10:05:01,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11712 to 11712. [2020-12-22 10:05:01,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11712 states. [2020-12-22 10:05:01,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11712 states to 11712 states and 17380 transitions. [2020-12-22 10:05:01,750 INFO L78 Accepts]: Start accepts. Automaton has 11712 states and 17380 transitions. Word has length 93 [2020-12-22 10:05:01,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:01,751 INFO L481 AbstractCegarLoop]: Abstraction has 11712 states and 17380 transitions. [2020-12-22 10:05:01,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:05:01,751 INFO L276 IsEmpty]: Start isEmpty. Operand 11712 states and 17380 transitions. [2020-12-22 10:05:01,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 10:05:01,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:01,753 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:05:01,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:05:01,753 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:01,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:01,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1319567043, now seen corresponding path program 1 times [2020-12-22 10:05:01,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:01,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850727827] [2020-12-22 10:05:01,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:01,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:05:01,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850727827] [2020-12-22 10:05:01,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756246197] [2020-12-22 10:05:01,906 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 10:05:02,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:02,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 10:05:02,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:05:02,255 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:05:02,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 10:05:02,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2020-12-22 10:05:02,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264918639] [2020-12-22 10:05:02,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:05:02,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:02,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:05:02,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:05:02,257 INFO L87 Difference]: Start difference. First operand 11712 states and 17380 transitions. Second operand 3 states. [2020-12-22 10:05:09,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:09,338 INFO L93 Difference]: Finished difference Result 18473 states and 28432 transitions. [2020-12-22 10:05:09,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:05:09,339 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 10:05:09,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:09,376 INFO L225 Difference]: With dead ends: 18473 [2020-12-22 10:05:09,376 INFO L226 Difference]: Without dead ends: 14716 [2020-12-22 10:05:09,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 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 10:05:09,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14716 states. [2020-12-22 10:05:10,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14716 to 14716. [2020-12-22 10:05:10,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14716 states. [2020-12-22 10:05:10,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14716 states to 14716 states and 21104 transitions. [2020-12-22 10:05:10,292 INFO L78 Accepts]: Start accepts. Automaton has 14716 states and 21104 transitions. Word has length 95 [2020-12-22 10:05:10,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:10,292 INFO L481 AbstractCegarLoop]: Abstraction has 14716 states and 21104 transitions. [2020-12-22 10:05:10,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:05:10,293 INFO L276 IsEmpty]: Start isEmpty. Operand 14716 states and 21104 transitions. [2020-12-22 10:05:10,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:05:10,299 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:10,299 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:05:10,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 10:05:10,514 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:10,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:10,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1411161737, now seen corresponding path program 1 times [2020-12-22 10:05:10,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:10,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994526647] [2020-12-22 10:05:10,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:10,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:10,681 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 10:05:10,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994526647] [2020-12-22 10:05:10,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:10,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:05:10,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337092011] [2020-12-22 10:05:10,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:05:10,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:10,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:05:10,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:05:10,686 INFO L87 Difference]: Start difference. First operand 14716 states and 21104 transitions. Second operand 8 states. [2020-12-22 10:05:13,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:13,408 INFO L93 Difference]: Finished difference Result 63722 states and 91815 transitions. [2020-12-22 10:05:13,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:05:13,409 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:05:13,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:13,516 INFO L225 Difference]: With dead ends: 63722 [2020-12-22 10:05:13,516 INFO L226 Difference]: Without dead ends: 55816 [2020-12-22 10:05:13,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:05:13,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55816 states. [2020-12-22 10:05:15,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55816 to 22620. [2020-12-22 10:05:15,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22620 states. [2020-12-22 10:05:15,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22620 states to 22620 states and 32432 transitions. [2020-12-22 10:05:15,555 INFO L78 Accepts]: Start accepts. Automaton has 22620 states and 32432 transitions. Word has length 112 [2020-12-22 10:05:15,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:15,557 INFO L481 AbstractCegarLoop]: Abstraction has 22620 states and 32432 transitions. [2020-12-22 10:05:15,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:05:15,558 INFO L276 IsEmpty]: Start isEmpty. Operand 22620 states and 32432 transitions. [2020-12-22 10:05:15,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:05:15,573 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:15,574 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:05:15,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:05:15,574 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:15,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:15,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1381639519, now seen corresponding path program 1 times [2020-12-22 10:05:15,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:15,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190638701] [2020-12-22 10:05:15,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:15,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:15,756 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:05:15,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190638701] [2020-12-22 10:05:15,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:15,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:05:15,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950008993] [2020-12-22 10:05:15,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:05:15,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:15,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:05:15,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:05:15,759 INFO L87 Difference]: Start difference. First operand 22620 states and 32432 transitions. Second operand 8 states. [2020-12-22 10:05:18,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:18,904 INFO L93 Difference]: Finished difference Result 71626 states and 103143 transitions. [2020-12-22 10:05:18,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:05:18,905 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:05:18,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:19,018 INFO L225 Difference]: With dead ends: 71626 [2020-12-22 10:05:19,019 INFO L226 Difference]: Without dead ends: 63720 [2020-12-22 10:05:19,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:05:19,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63720 states. [2020-12-22 10:05:21,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63720 to 34492. [2020-12-22 10:05:21,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34492 states. [2020-12-22 10:05:21,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34492 states to 34492 states and 49344 transitions. [2020-12-22 10:05:21,502 INFO L78 Accepts]: Start accepts. Automaton has 34492 states and 49344 transitions. Word has length 112 [2020-12-22 10:05:21,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:21,502 INFO L481 AbstractCegarLoop]: Abstraction has 34492 states and 49344 transitions. [2020-12-22 10:05:21,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:05:21,502 INFO L276 IsEmpty]: Start isEmpty. Operand 34492 states and 49344 transitions. [2020-12-22 10:05:21,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:05:21,512 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:21,512 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:05:21,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:05:21,513 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:21,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:21,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1107951807, now seen corresponding path program 1 times [2020-12-22 10:05:21,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:21,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427489663] [2020-12-22 10:05:21,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:21,685 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:05:21,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427489663] [2020-12-22 10:05:21,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:21,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:05:21,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301593262] [2020-12-22 10:05:21,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:05:21,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:21,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:05:21,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:05:21,688 INFO L87 Difference]: Start difference. First operand 34492 states and 49344 transitions. Second operand 8 states. [2020-12-22 10:05:25,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:25,750 INFO L93 Difference]: Finished difference Result 79530 states and 114471 transitions. [2020-12-22 10:05:25,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:05:25,751 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:05:25,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:25,847 INFO L225 Difference]: With dead ends: 79530 [2020-12-22 10:05:25,847 INFO L226 Difference]: Without dead ends: 71624 [2020-12-22 10:05:25,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:05:25,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71624 states. [2020-12-22 10:05:28,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71624 to 42396. [2020-12-22 10:05:28,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42396 states. [2020-12-22 10:05:28,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42396 states to 42396 states and 60672 transitions. [2020-12-22 10:05:28,716 INFO L78 Accepts]: Start accepts. Automaton has 42396 states and 60672 transitions. Word has length 112 [2020-12-22 10:05:28,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:28,717 INFO L481 AbstractCegarLoop]: Abstraction has 42396 states and 60672 transitions. [2020-12-22 10:05:28,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:05:28,717 INFO L276 IsEmpty]: Start isEmpty. Operand 42396 states and 60672 transitions. [2020-12-22 10:05:28,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:05:28,727 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:28,728 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:05:28,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:05:28,728 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:28,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:28,729 INFO L82 PathProgramCache]: Analyzing trace with hash 711119841, now seen corresponding path program 1 times [2020-12-22 10:05:28,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:28,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188585594] [2020-12-22 10:05:28,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:28,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:28,874 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 10:05:28,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188585594] [2020-12-22 10:05:28,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:28,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:05:28,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885173345] [2020-12-22 10:05:28,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:05:28,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:28,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:05:28,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:05:28,876 INFO L87 Difference]: Start difference. First operand 42396 states and 60672 transitions. Second operand 8 states. [2020-12-22 10:05:34,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:34,126 INFO L93 Difference]: Finished difference Result 87434 states and 125799 transitions. [2020-12-22 10:05:34,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:05:34,126 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:05:34,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:34,203 INFO L225 Difference]: With dead ends: 87434 [2020-12-22 10:05:34,203 INFO L226 Difference]: Without dead ends: 79528 [2020-12-22 10:05:34,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:05:34,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79528 states. [2020-12-22 10:05:37,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79528 to 50300. [2020-12-22 10:05:37,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50300 states. [2020-12-22 10:05:37,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50300 states to 50300 states and 72000 transitions. [2020-12-22 10:05:37,864 INFO L78 Accepts]: Start accepts. Automaton has 50300 states and 72000 transitions. Word has length 112 [2020-12-22 10:05:37,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:37,865 INFO L481 AbstractCegarLoop]: Abstraction has 50300 states and 72000 transitions. [2020-12-22 10:05:37,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:05:37,865 INFO L276 IsEmpty]: Start isEmpty. Operand 50300 states and 72000 transitions. [2020-12-22 10:05:37,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:05:37,875 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:37,875 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:05:37,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:05:37,875 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:37,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:37,876 INFO L82 PathProgramCache]: Analyzing trace with hash 890525825, now seen corresponding path program 1 times [2020-12-22 10:05:37,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:37,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021563754] [2020-12-22 10:05:37,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:38,019 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 10:05:38,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021563754] [2020-12-22 10:05:38,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:38,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:05:38,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065115236] [2020-12-22 10:05:38,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:05:38,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:38,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:05:38,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:05:38,023 INFO L87 Difference]: Start difference. First operand 50300 states and 72000 transitions. Second operand 8 states. [2020-12-22 10:05:44,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:44,054 INFO L93 Difference]: Finished difference Result 95338 states and 137127 transitions. [2020-12-22 10:05:44,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:05:44,055 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:05:44,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:44,150 INFO L225 Difference]: With dead ends: 95338 [2020-12-22 10:05:44,151 INFO L226 Difference]: Without dead ends: 87432 [2020-12-22 10:05:44,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:05:44,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87432 states. [2020-12-22 10:05:48,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87432 to 58204. [2020-12-22 10:05:48,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58204 states. [2020-12-22 10:05:48,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58204 states to 58204 states and 83328 transitions. [2020-12-22 10:05:48,727 INFO L78 Accepts]: Start accepts. Automaton has 58204 states and 83328 transitions. Word has length 112 [2020-12-22 10:05:48,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:48,727 INFO L481 AbstractCegarLoop]: Abstraction has 58204 states and 83328 transitions. [2020-12-22 10:05:48,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:05:48,727 INFO L276 IsEmpty]: Start isEmpty. Operand 58204 states and 83328 transitions. [2020-12-22 10:05:48,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:05:48,737 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:48,738 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:05:48,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:05:48,738 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:48,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:48,739 INFO L82 PathProgramCache]: Analyzing trace with hash -420877289, now seen corresponding path program 1 times [2020-12-22 10:05:48,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:48,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064184419] [2020-12-22 10:05:48,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:48,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:48,877 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:05:48,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064184419] [2020-12-22 10:05:48,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:48,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:05:48,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742913312] [2020-12-22 10:05:48,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:05:48,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:48,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:05:48,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:05:48,879 INFO L87 Difference]: Start difference. First operand 58204 states and 83328 transitions. Second operand 8 states. [2020-12-22 10:05:55,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:55,681 INFO L93 Difference]: Finished difference Result 98442 states and 141607 transitions. [2020-12-22 10:05:55,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:05:55,682 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:05:55,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:55,769 INFO L225 Difference]: With dead ends: 98442 [2020-12-22 10:05:55,769 INFO L226 Difference]: Without dead ends: 92936 [2020-12-22 10:05:55,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:05:55,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92936 states. [2020-12-22 10:06:00,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92936 to 63708. [2020-12-22 10:06:00,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63708 states. [2020-12-22 10:06:00,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63708 states to 63708 states and 91264 transitions. [2020-12-22 10:06:00,901 INFO L78 Accepts]: Start accepts. Automaton has 63708 states and 91264 transitions. Word has length 112 [2020-12-22 10:06:00,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:06:00,901 INFO L481 AbstractCegarLoop]: Abstraction has 63708 states and 91264 transitions. [2020-12-22 10:06:00,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:06:00,902 INFO L276 IsEmpty]: Start isEmpty. Operand 63708 states and 91264 transitions. [2020-12-22 10:06:00,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:06:00,911 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:00,911 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:06:00,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:06:00,912 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:00,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:00,912 INFO L82 PathProgramCache]: Analyzing trace with hash 746098925, now seen corresponding path program 1 times [2020-12-22 10:06:00,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:00,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795900845] [2020-12-22 10:06:00,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:00,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:06:00,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795900845] [2020-12-22 10:06:00,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:06:00,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:06:00,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921737742] [2020-12-22 10:06:00,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:06:00,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:00,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:06:00,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:06:00,985 INFO L87 Difference]: Start difference. First operand 63708 states and 91264 transitions. Second operand 3 states. [2020-12-22 10:06:05,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:05,811 INFO L93 Difference]: Finished difference Result 120608 states and 172850 transitions. [2020-12-22 10:06:05,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:06:05,812 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:06:05,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:05,882 INFO L225 Difference]: With dead ends: 120608 [2020-12-22 10:06:05,882 INFO L226 Difference]: Without dead ends: 63710 [2020-12-22 10:06:05,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:06:05,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63710 states. [2020-12-22 10:06:10,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63710 to 63708. [2020-12-22 10:06:10,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63708 states. [2020-12-22 10:06:10,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63708 states to 63708 states and 90576 transitions. [2020-12-22 10:06:10,970 INFO L78 Accepts]: Start accepts. Automaton has 63708 states and 90576 transitions. Word has length 113 [2020-12-22 10:06:10,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:06:10,970 INFO L481 AbstractCegarLoop]: Abstraction has 63708 states and 90576 transitions. [2020-12-22 10:06:10,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:06:10,970 INFO L276 IsEmpty]: Start isEmpty. Operand 63708 states and 90576 transitions. [2020-12-22 10:06:10,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:06:10,976 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:10,977 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:06:10,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:06:10,977 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:10,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:10,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1169646557, now seen corresponding path program 1 times [2020-12-22 10:06:10,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:10,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581728008] [2020-12-22 10:06:10,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:11,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:11,047 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:06:11,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581728008] [2020-12-22 10:06:11,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:06:11,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:06:11,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304372072] [2020-12-22 10:06:11,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:06:11,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:11,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:06:11,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:06:11,049 INFO L87 Difference]: Start difference. First operand 63708 states and 90576 transitions. Second operand 3 states. [2020-12-22 10:06:13,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:13,594 INFO L93 Difference]: Finished difference Result 92160 states and 131026 transitions. [2020-12-22 10:06:13,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:06:13,595 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:06:13,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:13,636 INFO L225 Difference]: With dead ends: 92160 [2020-12-22 10:06:13,636 INFO L226 Difference]: Without dead ends: 35262 [2020-12-22 10:06:13,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:06:13,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35262 states. [2020-12-22 10:06:16,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35262 to 35260. [2020-12-22 10:06:16,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35260 states. [2020-12-22 10:06:16,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35260 states to 35260 states and 49784 transitions. [2020-12-22 10:06:16,160 INFO L78 Accepts]: Start accepts. Automaton has 35260 states and 49784 transitions. Word has length 113 [2020-12-22 10:06:16,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:06:16,161 INFO L481 AbstractCegarLoop]: Abstraction has 35260 states and 49784 transitions. [2020-12-22 10:06:16,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:06:16,161 INFO L276 IsEmpty]: Start isEmpty. Operand 35260 states and 49784 transitions. [2020-12-22 10:06:16,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:06:16,164 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:16,164 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:06:16,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:06:16,164 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:16,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:16,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1209709145, now seen corresponding path program 1 times [2020-12-22 10:06:16,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:16,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995021417] [2020-12-22 10:06:16,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:16,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:16,247 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:06:16,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995021417] [2020-12-22 10:06:16,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:06:16,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:06:16,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630309724] [2020-12-22 10:06:16,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:06:16,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:16,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:06:16,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:06:16,250 INFO L87 Difference]: Start difference. First operand 35260 states and 49784 transitions. Second operand 3 states. [2020-12-22 10:06:17,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:17,587 INFO L93 Difference]: Finished difference Result 49488 states and 69838 transitions. [2020-12-22 10:06:17,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:06:17,587 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:06:17,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:17,608 INFO L225 Difference]: With dead ends: 49488 [2020-12-22 10:06:17,608 INFO L226 Difference]: Without dead ends: 21038 [2020-12-22 10:06:17,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:06:17,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21038 states. [2020-12-22 10:06:18,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21038 to 21036. [2020-12-22 10:06:18,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21036 states. [2020-12-22 10:06:19,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21036 states to 21036 states and 29560 transitions. [2020-12-22 10:06:19,005 INFO L78 Accepts]: Start accepts. Automaton has 21036 states and 29560 transitions. Word has length 113 [2020-12-22 10:06:19,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:06:19,006 INFO L481 AbstractCegarLoop]: Abstraction has 21036 states and 29560 transitions. [2020-12-22 10:06:19,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:06:19,006 INFO L276 IsEmpty]: Start isEmpty. Operand 21036 states and 29560 transitions. [2020-12-22 10:06:19,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:06:19,008 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:19,008 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:06:19,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 10:06:19,008 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:19,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:19,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1498655857, now seen corresponding path program 1 times [2020-12-22 10:06:19,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:19,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213038572] [2020-12-22 10:06:19,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:19,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:19,130 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:06:19,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213038572] [2020-12-22 10:06:19,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:06:19,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:06:19,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067749396] [2020-12-22 10:06:19,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:06:19,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:19,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:06:19,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:06:19,132 INFO L87 Difference]: Start difference. First operand 21036 states and 29560 transitions. Second operand 3 states. [2020-12-22 10:06:19,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:19,725 INFO L93 Difference]: Finished difference Result 28152 states and 39502 transitions. [2020-12-22 10:06:19,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:06:19,726 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:06:19,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:19,741 INFO L225 Difference]: With dead ends: 28152 [2020-12-22 10:06:19,741 INFO L226 Difference]: Without dead ends: 13926 [2020-12-22 10:06:19,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:06:19,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13926 states. [2020-12-22 10:06:20,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13926 to 13924. [2020-12-22 10:06:20,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13924 states. [2020-12-22 10:06:20,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13924 states to 13924 states and 19534 transitions. [2020-12-22 10:06:20,503 INFO L78 Accepts]: Start accepts. Automaton has 13924 states and 19534 transitions. Word has length 113 [2020-12-22 10:06:20,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:06:20,503 INFO L481 AbstractCegarLoop]: Abstraction has 13924 states and 19534 transitions. [2020-12-22 10:06:20,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:06:20,504 INFO L276 IsEmpty]: Start isEmpty. Operand 13924 states and 19534 transitions. [2020-12-22 10:06:20,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:06:20,505 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:20,505 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:06:20,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 10:06:20,506 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:20,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:20,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1585774651, now seen corresponding path program 1 times [2020-12-22 10:06:20,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:20,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836203496] [2020-12-22 10:06:20,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:20,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:20,879 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:06:20,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836203496] [2020-12-22 10:06:20,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333220781] [2020-12-22 10:06:20,879 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 10:06:21,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:21,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 10:06:21,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:06:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:06:21,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:06:21,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 10:06:21,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354813045] [2020-12-22 10:06:21,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:06:21,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:21,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:06:21,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:06:21,344 INFO L87 Difference]: Start difference. First operand 13924 states and 19534 transitions. Second operand 21 states. [2020-12-22 10:06:25,616 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:06:25,979 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-22 10:06:26,196 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 10:06:26,430 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-12-22 10:06:26,749 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:06:30,845 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-22 10:06:31,086 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:06:32,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:32,666 INFO L93 Difference]: Finished difference Result 61803 states and 84839 transitions. [2020-12-22 10:06:32,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-22 10:06:32,667 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 113 [2020-12-22 10:06:32,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:32,770 INFO L225 Difference]: With dead ends: 61803 [2020-12-22 10:06:32,770 INFO L226 Difference]: Without dead ends: 54689 [2020-12-22 10:06:32,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3479 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1672, Invalid=8228, Unknown=0, NotChecked=0, Total=9900 [2020-12-22 10:06:32,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54689 states. [2020-12-22 10:06:36,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54689 to 36944. [2020-12-22 10:06:36,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36944 states. [2020-12-22 10:06:36,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36944 states to 36944 states and 50702 transitions. [2020-12-22 10:06:36,328 INFO L78 Accepts]: Start accepts. Automaton has 36944 states and 50702 transitions. Word has length 113 [2020-12-22 10:06:36,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:06:36,328 INFO L481 AbstractCegarLoop]: Abstraction has 36944 states and 50702 transitions. [2020-12-22 10:06:36,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:06:36,328 INFO L276 IsEmpty]: Start isEmpty. Operand 36944 states and 50702 transitions. [2020-12-22 10:06:36,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:06:36,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:36,335 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:06:36,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 10:06:36,550 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:36,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:36,551 INFO L82 PathProgramCache]: Analyzing trace with hash -409173495, now seen corresponding path program 1 times [2020-12-22 10:06:36,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:36,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444572111] [2020-12-22 10:06:36,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:06:36,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444572111] [2020-12-22 10:06:36,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850732139] [2020-12-22 10:06:36,874 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 10:06:37,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:37,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 10:06:37,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:06:37,319 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:06:37,677 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:06:37,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:06:37,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:06:37,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590088273] [2020-12-22 10:06:37,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:06:37,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:37,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:06:37,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:06:37,679 INFO L87 Difference]: Start difference. First operand 36944 states and 50702 transitions. Second operand 18 states. [2020-12-22 10:06:37,804 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:06:38,275 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:06:40,312 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:06:40,450 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:06:40,782 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:06:41,113 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:06:42,896 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:06:43,423 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 10:06:43,579 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:06:43,717 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:06:44,228 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 10:06:44,366 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:06:46,259 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:06:46,537 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:06:46,690 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:06:49,172 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:06:49,569 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:06:49,745 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:06:49,887 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 10:06:50,028 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 10:06:50,700 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 10:06:50,959 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:06:51,137 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 10:06:52,036 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 10:06:56,520 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 10:06:56,663 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:06:56,863 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 10:06:57,003 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:06:57,957 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:06:58,530 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:07:30,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:30,906 INFO L93 Difference]: Finished difference Result 395714 states and 534286 transitions. [2020-12-22 10:07:30,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 10:07:30,907 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 114 [2020-12-22 10:07:30,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:31,568 INFO L225 Difference]: With dead ends: 395714 [2020-12-22 10:07:31,568 INFO L226 Difference]: Without dead ends: 365580 [2020-12-22 10:07:31,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6383 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=2552, Invalid=14478, Unknown=0, NotChecked=0, Total=17030 [2020-12-22 10:07:32,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365580 states. [2020-12-22 10:07:49,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365580 to 143221. [2020-12-22 10:07:49,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143221 states. [2020-12-22 10:07:49,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143221 states to 143221 states and 192228 transitions. [2020-12-22 10:07:49,848 INFO L78 Accepts]: Start accepts. Automaton has 143221 states and 192228 transitions. Word has length 114 [2020-12-22 10:07:49,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:49,848 INFO L481 AbstractCegarLoop]: Abstraction has 143221 states and 192228 transitions. [2020-12-22 10:07:49,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:07:49,849 INFO L276 IsEmpty]: Start isEmpty. Operand 143221 states and 192228 transitions. [2020-12-22 10:07:50,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:07:50,112 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:50,112 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:07:50,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 10:07:50,314 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:50,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:50,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1061210015, now seen corresponding path program 1 times [2020-12-22 10:07:50,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:50,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465621703] [2020-12-22 10:07:50,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:50,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:50,416 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:07:50,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465621703] [2020-12-22 10:07:50,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:50,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:07:50,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712873846] [2020-12-22 10:07:50,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:07:50,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:50,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:07:50,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:50,419 INFO L87 Difference]: Start difference. First operand 143221 states and 192228 transitions. Second operand 3 states. [2020-12-22 10:07:56,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:56,693 INFO L93 Difference]: Finished difference Result 195313 states and 261363 transitions. [2020-12-22 10:07:56,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:07:56,694 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 114 [2020-12-22 10:07:56,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:56,783 INFO L225 Difference]: With dead ends: 195313 [2020-12-22 10:07:56,783 INFO L226 Difference]: Without dead ends: 58902 [2020-12-22 10:07:56,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:56,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58902 states. [2020-12-22 10:08:03,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58902 to 55426. [2020-12-22 10:08:03,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55426 states. [2020-12-22 10:08:03,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55426 states to 55426 states and 73810 transitions. [2020-12-22 10:08:03,121 INFO L78 Accepts]: Start accepts. Automaton has 55426 states and 73810 transitions. Word has length 114 [2020-12-22 10:08:03,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:03,121 INFO L481 AbstractCegarLoop]: Abstraction has 55426 states and 73810 transitions. [2020-12-22 10:08:03,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:08:03,121 INFO L276 IsEmpty]: Start isEmpty. Operand 55426 states and 73810 transitions. [2020-12-22 10:08:03,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:08:03,124 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:03,125 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:08:03,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 10:08:03,125 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:03,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:03,125 INFO L82 PathProgramCache]: Analyzing trace with hash 707187499, now seen corresponding path program 1 times [2020-12-22 10:08:03,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:03,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876696699] [2020-12-22 10:08:03,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:03,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:03,226 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 10:08:03,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876696699] [2020-12-22 10:08:03,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:03,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:08:03,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472268388] [2020-12-22 10:08:03,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:08:03,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:03,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:08:03,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:08:03,228 INFO L87 Difference]: Start difference. First operand 55426 states and 73810 transitions. Second operand 6 states.