/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/array-crafted/zero_sum5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:23:34,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:23:34,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:23:34,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:23:34,711 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:23:34,716 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:23:34,720 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:23:34,729 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:23:34,733 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:23:34,741 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:23:34,742 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:23:34,744 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 22:23:34,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 22:23:34,749 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 22:23:34,751 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 22:23:34,753 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 22:23:34,754 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 22:23:34,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 22:23:34,780 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 22:23:34,789 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 22:23:34,792 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 22:23:34,794 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 22:23:34,795 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 22:23:34,798 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 22:23:34,808 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 22:23:34,821 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:23:34,822 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:23:34,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:23:34,824 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:23:34,886 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:23:34,887 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:23:34,891 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:23:34,892 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:23:34,892 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:23:34,892 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:23:34,892 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:23:34,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:23:34,893 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:23:34,893 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:23:34,894 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:23:34,895 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:23:34,895 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:23:34,895 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:23:34,895 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:23:34,896 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:23:34,896 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:23:34,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:23:34,896 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:23:34,896 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:23:34,897 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:23:34,897 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:23:34,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:23:34,898 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:23:34,898 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:23:34,898 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:23:35,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:23:35,393 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:23:35,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:23:35,397 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:23:35,398 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:23:35,399 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum5.c [2020-12-21 22:23:35,478 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f3b1d147/c59db075cc87434e8b3c3926df5492c9/FLAG694f06af8 [2020-12-21 22:23:36,075 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:23:36,076 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum5.c [2020-12-21 22:23:36,087 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f3b1d147/c59db075cc87434e8b3c3926df5492c9/FLAG694f06af8 [2020-12-21 22:23:36,443 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f3b1d147/c59db075cc87434e8b3c3926df5492c9 [2020-12-21 22:23:36,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:23:36,450 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:23:36,455 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:23:36,455 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:23:36,460 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:23:36,461 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:23:36" (1/1) ... [2020-12-21 22:23:36,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35e330fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:36, skipping insertion in model container [2020-12-21 22:23:36,464 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:23:36" (1/1) ... [2020-12-21 22:23:36,474 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:23:36,503 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:23:36,744 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/array-crafted/zero_sum5.c[400,413] [2020-12-21 22:23:36,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:23:36,814 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:23:36,832 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/array-crafted/zero_sum5.c[400,413] [2020-12-21 22:23:36,873 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:23:36,898 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:23:36,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:36 WrapperNode [2020-12-21 22:23:36,899 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:23:36,901 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:23:36,901 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:23:36,901 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:23:36,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:36" (1/1) ... [2020-12-21 22:23:36,936 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:36" (1/1) ... [2020-12-21 22:23:36,980 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:23:36,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:23:36,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:23:36,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:23:36,995 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:36" (1/1) ... [2020-12-21 22:23:36,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:36" (1/1) ... [2020-12-21 22:23:37,013 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:36" (1/1) ... [2020-12-21 22:23:37,013 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:36" (1/1) ... [2020-12-21 22:23:37,030 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:36" (1/1) ... [2020-12-21 22:23:37,044 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:36" (1/1) ... [2020-12-21 22:23:37,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:36" (1/1) ... [2020-12-21 22:23:37,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:23:37,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:23:37,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:23:37,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:23:37,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:36" (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 [2020-12-21 22:23:37,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:23:37,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:23:37,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:23:37,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:23:37,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:23:37,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:23:37,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:23:37,692 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:23:37,695 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-21 22:23:37,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:23:37 BoogieIcfgContainer [2020-12-21 22:23:37,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:23:37,702 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:23:37,702 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:23:37,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:23:37,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:23:36" (1/3) ... [2020-12-21 22:23:37,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2887a4f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:23:37, skipping insertion in model container [2020-12-21 22:23:37,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:23:36" (2/3) ... [2020-12-21 22:23:37,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2887a4f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:23:37, skipping insertion in model container [2020-12-21 22:23:37,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:23:37" (3/3) ... [2020-12-21 22:23:37,712 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum5.c [2020-12-21 22:23:37,719 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:23:37,724 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:23:37,744 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:23:37,793 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:23:37,799 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:23:37,799 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:23:37,799 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:23:37,799 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:23:37,799 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:23:37,800 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:23:37,800 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:23:37,824 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-12-21 22:23:37,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 22:23:37,831 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:23:37,833 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] [2020-12-21 22:23:37,833 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:23:37,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:23:37,841 INFO L82 PathProgramCache]: Analyzing trace with hash 226651140, now seen corresponding path program 1 times [2020-12-21 22:23:37,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:23:37,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587239306] [2020-12-21 22:23:37,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:23:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:23:38,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:23:38,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587239306] [2020-12-21 22:23:38,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:23:38,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:23:38,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574170916] [2020-12-21 22:23:38,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:23:38,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:23:38,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:23:38,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:23:38,149 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 2 states. [2020-12-21 22:23:38,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:23:38,173 INFO L93 Difference]: Finished difference Result 83 states and 126 transitions. [2020-12-21 22:23:38,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:23:38,174 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 27 [2020-12-21 22:23:38,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:23:38,184 INFO L225 Difference]: With dead ends: 83 [2020-12-21 22:23:38,185 INFO L226 Difference]: Without dead ends: 39 [2020-12-21 22:23:38,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:23:38,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-21 22:23:38,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-21 22:23:38,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-21 22:23:38,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2020-12-21 22:23:38,228 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 27 [2020-12-21 22:23:38,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:23:38,229 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2020-12-21 22:23:38,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:23:38,229 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2020-12-21 22:23:38,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 22:23:38,231 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:23:38,231 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] [2020-12-21 22:23:38,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 22:23:38,232 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:23:38,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:23:38,233 INFO L82 PathProgramCache]: Analyzing trace with hash -833651044, now seen corresponding path program 1 times [2020-12-21 22:23:38,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:23:38,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357928659] [2020-12-21 22:23:38,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:23:38,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:23:38,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:23:38,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357928659] [2020-12-21 22:23:38,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:23:38,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:23:38,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271747041] [2020-12-21 22:23:38,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 22:23:38,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:23:38,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 22:23:38,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:23:38,312 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 3 states. [2020-12-21 22:23:38,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:23:38,388 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2020-12-21 22:23:38,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 22:23:38,389 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-12-21 22:23:38,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:23:38,390 INFO L225 Difference]: With dead ends: 75 [2020-12-21 22:23:38,390 INFO L226 Difference]: Without dead ends: 41 [2020-12-21 22:23:38,391 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 [2020-12-21 22:23:38,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-21 22:23:38,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-12-21 22:23:38,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-21 22:23:38,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2020-12-21 22:23:38,399 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 27 [2020-12-21 22:23:38,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:23:38,399 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2020-12-21 22:23:38,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 22:23:38,400 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2020-12-21 22:23:38,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 22:23:38,401 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:23:38,401 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] [2020-12-21 22:23:38,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 22:23:38,402 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:23:38,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:23:38,403 INFO L82 PathProgramCache]: Analyzing trace with hash 479992254, now seen corresponding path program 1 times [2020-12-21 22:23:38,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:23:38,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168802366] [2020-12-21 22:23:38,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:23:38,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:23:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 22:23:38,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168802366] [2020-12-21 22:23:38,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:23:38,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:23:38,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207388533] [2020-12-21 22:23:38,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:23:38,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:23:38,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:23:38,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:23:38,481 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 4 states. [2020-12-21 22:23:38,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:23:38,723 INFO L93 Difference]: Finished difference Result 91 states and 119 transitions. [2020-12-21 22:23:38,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:23:38,726 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-12-21 22:23:38,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:23:38,727 INFO L225 Difference]: With dead ends: 91 [2020-12-21 22:23:38,727 INFO L226 Difference]: Without dead ends: 60 [2020-12-21 22:23:38,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:23:38,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-21 22:23:38,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-12-21 22:23:38,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-21 22:23:38,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-12-21 22:23:38,749 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 29 [2020-12-21 22:23:38,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:23:38,749 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-12-21 22:23:38,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:23:38,750 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-12-21 22:23:38,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-21 22:23:38,751 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:23:38,752 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] [2020-12-21 22:23:38,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-21 22:23:38,752 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:23:38,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:23:38,753 INFO L82 PathProgramCache]: Analyzing trace with hash -509099182, now seen corresponding path program 1 times [2020-12-21 22:23:38,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:23:38,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028625423] [2020-12-21 22:23:38,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:23:38,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:23:38,878 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-21 22:23:38,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028625423] [2020-12-21 22:23:38,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42067825] [2020-12-21 22:23:38,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:23:39,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:23:39,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:23:39,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:23:39,145 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-21 22:23:39,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:23:39,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-21 22:23:39,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902323383] [2020-12-21 22:23:39,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:23:39,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:23:39,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:23:39,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:23:39,149 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 6 states. [2020-12-21 22:23:39,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:23:39,234 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2020-12-21 22:23:39,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:23:39,235 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-12-21 22:23:39,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:23:39,236 INFO L225 Difference]: With dead ends: 97 [2020-12-21 22:23:39,236 INFO L226 Difference]: Without dead ends: 53 [2020-12-21 22:23:39,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:23:39,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-21 22:23:39,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-12-21 22:23:39,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-21 22:23:39,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2020-12-21 22:23:39,247 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 49 [2020-12-21 22:23:39,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:23:39,247 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2020-12-21 22:23:39,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:23:39,247 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2020-12-21 22:23:39,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 22:23:39,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:23:39,249 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-21 22:23:39,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:23:39,464 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:23:39,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:23:39,466 INFO L82 PathProgramCache]: Analyzing trace with hash 290748660, now seen corresponding path program 2 times [2020-12-21 22:23:39,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:23:39,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77534517] [2020-12-21 22:23:39,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:23:39,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:23:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-21 22:23:39,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77534517] [2020-12-21 22:23:39,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529144694] [2020-12-21 22:23:39,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-12-21 22:23:39,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:23:39,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:23:39,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:23:39,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:23:39,765 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-21 22:23:39,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:23:39,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-12-21 22:23:39,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868016606] [2020-12-21 22:23:39,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:23:39,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:23:39,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:23:39,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:23:39,768 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 7 states. [2020-12-21 22:23:40,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:23:40,029 INFO L93 Difference]: Finished difference Result 122 states and 150 transitions. [2020-12-21 22:23:40,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:23:40,029 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2020-12-21 22:23:40,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:23:40,030 INFO L225 Difference]: With dead ends: 122 [2020-12-21 22:23:40,031 INFO L226 Difference]: Without dead ends: 82 [2020-12-21 22:23:40,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:23:40,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-21 22:23:40,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2020-12-21 22:23:40,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-21 22:23:40,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2020-12-21 22:23:40,042 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 51 [2020-12-21 22:23:40,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:23:40,042 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2020-12-21 22:23:40,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:23:40,043 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2020-12-21 22:23:40,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-21 22:23:40,045 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:23:40,045 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] [2020-12-21 22:23:40,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:23:40,261 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:23:40,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:23:40,263 INFO L82 PathProgramCache]: Analyzing trace with hash -813057144, now seen corresponding path program 3 times [2020-12-21 22:23:40,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:23:40,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527953774] [2020-12-21 22:23:40,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:23:40,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:23:42,358 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:23:42,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527953774] [2020-12-21 22:23:42,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882331235] [2020-12-21 22:23:42,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-12-21 22:23:42,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 22:23:42,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:23:42,463 WARN L261 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 104 conjunts are in the unsatisfiable core [2020-12-21 22:23:42,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:23:44,376 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:23:44,376 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2020-12-21 22:23:44,379 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2020-12-21 22:23:44,391 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:23:44,394 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:23:44,397 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:23:44,398 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:31 [2020-12-21 22:23:44,492 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:23:44,566 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:23:44,568 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:23:44,589 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:23:44,673 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:23:44,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:23:44,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22] total 35 [2020-12-21 22:23:44,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670324131] [2020-12-21 22:23:44,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-21 22:23:44,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:23:44,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-21 22:23:44,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 22:23:44,681 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand 35 states. [2020-12-21 22:23:47,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:23:47,753 INFO L93 Difference]: Finished difference Result 207 states and 237 transitions. [2020-12-21 22:23:47,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-21 22:23:47,754 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 71 [2020-12-21 22:23:47,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:23:47,756 INFO L225 Difference]: With dead ends: 207 [2020-12-21 22:23:47,756 INFO L226 Difference]: Without dead ends: 201 [2020-12-21 22:23:47,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 53 SyntacticMatches, 40 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=214, Invalid=1856, Unknown=0, NotChecked=0, Total=2070 [2020-12-21 22:23:47,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-12-21 22:23:47,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 125. [2020-12-21 22:23:47,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-21 22:23:47,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 144 transitions. [2020-12-21 22:23:47,782 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 144 transitions. Word has length 71 [2020-12-21 22:23:47,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:23:47,782 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 144 transitions. [2020-12-21 22:23:47,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-21 22:23:47,783 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 144 transitions. [2020-12-21 22:23:47,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-21 22:23:47,784 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:23:47,785 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-12-21 22:23:47,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:23:47,986 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:23:47,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:23:47,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1767165226, now seen corresponding path program 4 times [2020-12-21 22:23:47,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:23:47,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659299012] [2020-12-21 22:23:47,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:23:48,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:23:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 22:23:48,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659299012] [2020-12-21 22:23:48,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059706078] [2020-12-21 22:23:48,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:23:48,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:23:48,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:23:48,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:23:48,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:23:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 22:23:48,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:23:48,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-21 22:23:48,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960170726] [2020-12-21 22:23:48,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:23:48,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:23:48,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:23:48,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:23:48,364 INFO L87 Difference]: Start difference. First operand 125 states and 144 transitions. Second operand 13 states. [2020-12-21 22:23:48,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:23:48,754 INFO L93 Difference]: Finished difference Result 248 states and 286 transitions. [2020-12-21 22:23:48,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:23:48,754 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 73 [2020-12-21 22:23:48,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:23:48,756 INFO L225 Difference]: With dead ends: 248 [2020-12-21 22:23:48,756 INFO L226 Difference]: Without dead ends: 128 [2020-12-21 22:23:48,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:23:48,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-21 22:23:48,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-12-21 22:23:48,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-21 22:23:48,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 146 transitions. [2020-12-21 22:23:48,783 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 146 transitions. Word has length 73 [2020-12-21 22:23:48,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:23:48,783 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 146 transitions. [2020-12-21 22:23:48,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:23:48,783 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 146 transitions. [2020-12-21 22:23:48,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-21 22:23:48,785 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:23:48,785 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-12-21 22:23:49,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:23:49,000 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:23:49,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:23:49,003 INFO L82 PathProgramCache]: Analyzing trace with hash 570637516, now seen corresponding path program 5 times [2020-12-21 22:23:49,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:23:49,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696737900] [2020-12-21 22:23:49,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:23:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:23:49,109 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-12-21 22:23:49,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696737900] [2020-12-21 22:23:49,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117339245] [2020-12-21 22:23:49,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:23:49,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-21 22:23:49,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:23:49,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:23:49,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:23:49,461 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-12-21 22:23:49,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:23:49,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-21 22:23:49,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3388094] [2020-12-21 22:23:49,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:23:49,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:23:49,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:23:49,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:23:49,464 INFO L87 Difference]: Start difference. First operand 127 states and 146 transitions. Second operand 13 states. [2020-12-21 22:23:49,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:23:49,915 INFO L93 Difference]: Finished difference Result 209 states and 245 transitions. [2020-12-21 22:23:49,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:23:49,917 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 75 [2020-12-21 22:23:49,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:23:49,921 INFO L225 Difference]: With dead ends: 209 [2020-12-21 22:23:49,921 INFO L226 Difference]: Without dead ends: 104 [2020-12-21 22:23:49,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2020-12-21 22:23:49,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-21 22:23:49,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2020-12-21 22:23:49,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-21 22:23:49,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2020-12-21 22:23:49,956 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 75 [2020-12-21 22:23:49,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:23:49,957 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2020-12-21 22:23:49,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:23:49,957 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2020-12-21 22:23:49,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-21 22:23:49,961 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:23:49,961 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:23:50,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:23:50,179 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:23:50,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:23:50,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1413596990, now seen corresponding path program 6 times [2020-12-21 22:23:50,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:23:50,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019970447] [2020-12-21 22:23:50,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:23:50,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:23:53,509 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-21 22:23:55,709 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:23:55,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019970447] [2020-12-21 22:23:55,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702254308] [2020-12-21 22:23:55,710 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:23:55,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-21 22:23:55,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:23:55,822 WARN L261 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 142 conjunts are in the unsatisfiable core [2020-12-21 22:23:55,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:24:03,878 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:24:04,043 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:24:04,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:24:04,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 46] total 80 [2020-12-21 22:24:04,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859823895] [2020-12-21 22:24:04,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-12-21 22:24:04,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:24:04,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-12-21 22:24:04,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=5830, Unknown=0, NotChecked=0, Total=6320 [2020-12-21 22:24:04,049 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand 80 states. [2020-12-21 22:24:05,710 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 21 [2020-12-21 22:24:06,244 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2020-12-21 22:24:06,865 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 77 [2020-12-21 22:24:07,702 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 44 [2020-12-21 22:24:08,004 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2020-12-21 22:24:08,550 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 71 [2020-12-21 22:24:08,939 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 68 [2020-12-21 22:24:09,539 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 60 [2020-12-21 22:24:10,082 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2020-12-21 22:24:10,825 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-12-21 22:24:11,334 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 77 [2020-12-21 22:24:12,386 WARN L197 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 68 [2020-12-21 22:24:12,939 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-12-21 22:24:13,426 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2020-12-21 22:24:14,513 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2020-12-21 22:24:15,147 WARN L197 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-12-21 22:24:15,785 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2020-12-21 22:24:16,304 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2020-12-21 22:24:16,804 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-12-21 22:24:18,910 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-12-21 22:24:19,371 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2020-12-21 22:24:27,739 WARN L197 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 79 [2020-12-21 22:24:28,538 WARN L197 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 73 [2020-12-21 22:24:29,118 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-12-21 22:24:29,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:24:29,183 INFO L93 Difference]: Finished difference Result 311 states and 357 transitions. [2020-12-21 22:24:29,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-21 22:24:29,184 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 93 [2020-12-21 22:24:29,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:24:29,186 INFO L225 Difference]: With dead ends: 311 [2020-12-21 22:24:29,186 INFO L226 Difference]: Without dead ends: 185 [2020-12-21 22:24:29,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 62 SyntacticMatches, 25 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5736 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=1236, Invalid=13526, Unknown=0, NotChecked=0, Total=14762 [2020-12-21 22:24:29,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-12-21 22:24:29,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 157. [2020-12-21 22:24:29,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-21 22:24:29,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 174 transitions. [2020-12-21 22:24:29,214 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 174 transitions. Word has length 93 [2020-12-21 22:24:29,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:24:29,215 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 174 transitions. [2020-12-21 22:24:29,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-12-21 22:24:29,215 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 174 transitions. [2020-12-21 22:24:29,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-21 22:24:29,217 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:24:29,217 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:24:29,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:24:29,432 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:24:29,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:24:29,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1562684038, now seen corresponding path program 7 times [2020-12-21 22:24:29,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:24:29,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413478805] [2020-12-21 22:24:29,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:24:29,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:24:29,582 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-12-21 22:24:29,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413478805] [2020-12-21 22:24:29,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747120050] [2020-12-21 22:24:29,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:24:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:24:29,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 22:24:29,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:24:29,904 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-12-21 22:24:29,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:24:29,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2020-12-21 22:24:29,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335733613] [2020-12-21 22:24:29,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 22:24:29,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:24:29,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 22:24:29,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:24:29,906 INFO L87 Difference]: Start difference. First operand 157 states and 174 transitions. Second operand 16 states. [2020-12-21 22:24:30,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:24:30,713 INFO L93 Difference]: Finished difference Result 253 states and 286 transitions. [2020-12-21 22:24:30,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 22:24:30,714 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 101 [2020-12-21 22:24:30,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:24:30,715 INFO L225 Difference]: With dead ends: 253 [2020-12-21 22:24:30,715 INFO L226 Difference]: Without dead ends: 126 [2020-12-21 22:24:30,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2020-12-21 22:24:30,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-21 22:24:30,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 116. [2020-12-21 22:24:30,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-21 22:24:30,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2020-12-21 22:24:30,732 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 101 [2020-12-21 22:24:30,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:24:30,733 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2020-12-21 22:24:30,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 22:24:30,733 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2020-12-21 22:24:30,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-21 22:24:30,734 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:24:30,734 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:24:30,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-21 22:24:30,949 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:24:30,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:24:30,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1433123212, now seen corresponding path program 8 times [2020-12-21 22:24:30,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:24:30,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663416196] [2020-12-21 22:24:30,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:24:31,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:24:33,016 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-21 22:24:33,651 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2020-12-21 22:24:33,838 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2020-12-21 22:24:34,040 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2020-12-21 22:24:34,261 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-12-21 22:24:34,674 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 36 [2020-12-21 22:24:34,866 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2020-12-21 22:24:35,060 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2020-12-21 22:24:35,270 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2020-12-21 22:24:36,093 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 36 [2020-12-21 22:24:36,307 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2020-12-21 22:24:42,930 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 4 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:24:42,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663416196] [2020-12-21 22:24:42,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823170240] [2020-12-21 22:24:42,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:24:43,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:24:43,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:24:43,040 WARN L261 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 180 conjunts are in the unsatisfiable core [2020-12-21 22:24:43,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:24:47,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:24:47,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:24:47,248 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-21 22:24:47,249 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-21 22:24:47,255 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:24:47,255 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 23 [2020-12-21 22:24:47,259 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:24:47,269 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:24:47,272 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:24:47,272 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:75, output treesize:7 [2020-12-21 22:24:47,383 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:24:47,576 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 22:24:47,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:24:47,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 23] total 76 [2020-12-21 22:24:47,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640488905] [2020-12-21 22:24:47,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-12-21 22:24:47,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:24:47,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-12-21 22:24:47,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=5284, Unknown=0, NotChecked=0, Total=5700 [2020-12-21 22:24:47,585 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand 76 states. [2020-12-21 22:24:51,547 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-12-21 22:24:51,781 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2020-12-21 22:24:52,154 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-12-21 22:24:52,793 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 48 [2020-12-21 22:24:53,393 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2020-12-21 22:24:54,101 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 57 [2020-12-21 22:24:55,568 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 31 [2020-12-21 22:24:56,057 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 35 [2020-12-21 22:24:56,564 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 37 [2020-12-21 22:24:57,237 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-12-21 22:24:57,867 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2020-12-21 22:24:59,277 WARN L197 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 59 [2020-12-21 22:25:09,766 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-12-21 22:25:10,403 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-12-21 22:25:10,850 WARN L197 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 61 [2020-12-21 22:25:10,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:25:10,898 INFO L93 Difference]: Finished difference Result 366 states and 406 transitions. [2020-12-21 22:25:10,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-21 22:25:10,900 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 115 [2020-12-21 22:25:10,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:25:10,901 INFO L225 Difference]: With dead ends: 366 [2020-12-21 22:25:10,902 INFO L226 Difference]: Without dead ends: 220 [2020-12-21 22:25:10,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 96 SyntacticMatches, 39 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6133 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=1294, Invalid=13226, Unknown=0, NotChecked=0, Total=14520 [2020-12-21 22:25:10,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-12-21 22:25:10,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 203. [2020-12-21 22:25:10,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-12-21 22:25:10,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 222 transitions. [2020-12-21 22:25:10,930 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 222 transitions. Word has length 115 [2020-12-21 22:25:10,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:25:10,930 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 222 transitions. [2020-12-21 22:25:10,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-12-21 22:25:10,930 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 222 transitions. [2020-12-21 22:25:10,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-21 22:25:10,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:25:10,932 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:25:11,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-21 22:25:11,145 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:25:11,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:25:11,147 INFO L82 PathProgramCache]: Analyzing trace with hash -2097901128, now seen corresponding path program 9 times [2020-12-21 22:25:11,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:25:11,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553754195] [2020-12-21 22:25:11,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:25:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:25:11,381 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-12-21 22:25:11,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553754195] [2020-12-21 22:25:11,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433462625] [2020-12-21 22:25:11,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:25:11,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 22:25:11,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:25:11,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 22:25:11,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:25:12,087 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-12-21 22:25:12,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:25:12,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-12-21 22:25:12,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641196089] [2020-12-21 22:25:12,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-21 22:25:12,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:25:12,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-21 22:25:12,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2020-12-21 22:25:12,089 INFO L87 Difference]: Start difference. First operand 203 states and 222 transitions. Second operand 23 states. [2020-12-21 22:25:14,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:25:14,078 INFO L93 Difference]: Finished difference Result 317 states and 353 transitions. [2020-12-21 22:25:14,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 22:25:14,079 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 119 [2020-12-21 22:25:14,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:25:14,081 INFO L225 Difference]: With dead ends: 317 [2020-12-21 22:25:14,081 INFO L226 Difference]: Without dead ends: 148 [2020-12-21 22:25:14,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2020-12-21 22:25:14,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-12-21 22:25:14,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 138. [2020-12-21 22:25:14,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-12-21 22:25:14,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2020-12-21 22:25:14,097 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 119 [2020-12-21 22:25:14,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:25:14,098 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2020-12-21 22:25:14,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-21 22:25:14,098 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2020-12-21 22:25:14,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-21 22:25:14,099 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:25:14,099 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:25:14,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:25:14,313 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:25:14,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:25:14,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1639815466, now seen corresponding path program 10 times [2020-12-21 22:25:14,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:25:14,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076404076] [2020-12-21 22:25:14,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:25:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:25:16,794 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2020-12-21 22:25:17,011 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2020-12-21 22:25:17,198 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-21 22:25:17,373 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-21 22:25:17,591 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2020-12-21 22:25:17,781 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-12-21 22:25:18,560 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-12-21 22:25:18,778 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-12-21 22:25:19,165 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-12-21 22:25:19,358 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2020-12-21 22:25:19,570 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2020-12-21 22:25:20,863 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-21 22:25:21,087 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2020-12-21 22:25:21,301 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-12-21 22:25:21,525 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2020-12-21 22:25:21,765 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2020-12-21 22:25:22,003 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-12-21 22:25:23,242 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 33 [2020-12-21 22:25:23,476 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2020-12-21 22:25:24,196 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-12-21 22:25:24,458 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-12-21 22:25:32,790 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 18 proven. 257 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:25:32,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076404076] [2020-12-21 22:25:32,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254477509] [2020-12-21 22:25:32,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:25:32,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:25:32,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:25:33,000 WARN L261 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 210 conjunts are in the unsatisfiable core [2020-12-21 22:25:33,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:25:41,553 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:25:41,916 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 250 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-21 22:25:41,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:25:41,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 24] total 92 [2020-12-21 22:25:41,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307041363] [2020-12-21 22:25:41,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-12-21 22:25:41,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:25:41,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-12-21 22:25:41,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=7911, Unknown=0, NotChecked=0, Total=8372 [2020-12-21 22:25:41,921 INFO L87 Difference]: Start difference. First operand 138 states and 148 transitions. Second operand 92 states. [2020-12-21 22:25:45,034 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 34 [2020-12-21 22:25:45,403 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 32 [2020-12-21 22:25:46,116 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 31 [2020-12-21 22:25:46,539 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 35 [2020-12-21 22:25:47,472 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 37 [2020-12-21 22:25:48,264 WARN L197 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 78 [2020-12-21 22:25:49,057 WARN L197 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 69 [2020-12-21 22:25:49,923 WARN L197 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 69 [2020-12-21 22:25:50,903 WARN L197 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 63 [2020-12-21 22:25:51,844 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 32 [2020-12-21 22:25:52,168 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-12-21 22:25:52,543 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 32 [2020-12-21 22:25:53,071 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 36 [2020-12-21 22:25:53,435 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 37 [2020-12-21 22:25:53,879 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 38 [2020-12-21 22:25:54,233 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 38 [2020-12-21 22:25:55,075 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 39 [2020-12-21 22:25:55,515 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 38 [2020-12-21 22:25:55,960 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 41 [2020-12-21 22:25:56,496 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 42 [2020-12-21 22:25:56,994 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2020-12-21 22:25:57,740 WARN L197 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2020-12-21 22:25:58,258 WARN L197 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2020-12-21 22:25:58,994 WARN L197 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2020-12-21 22:25:59,907 WARN L197 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 84 [2020-12-21 22:26:00,839 WARN L197 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2020-12-21 22:26:01,867 WARN L197 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 65 [2020-12-21 22:26:03,036 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 36 [2020-12-21 22:26:03,526 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 39 [2020-12-21 22:26:04,016 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 39 [2020-12-21 22:26:04,537 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 40 [2020-12-21 22:26:05,066 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 40 [2020-12-21 22:26:05,602 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 42 [2020-12-21 22:26:06,768 WARN L197 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 93 [2020-12-21 22:26:07,938 WARN L197 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 88 [2020-12-21 22:26:08,976 WARN L197 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 76 [2020-12-21 22:26:27,328 WARN L197 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 67 [2020-12-21 22:26:28,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:26:28,052 INFO L93 Difference]: Finished difference Result 282 states and 309 transitions. [2020-12-21 22:26:28,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-21 22:26:28,055 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 137 [2020-12-21 22:26:28,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:26:28,058 INFO L225 Difference]: With dead ends: 282 [2020-12-21 22:26:28,058 INFO L226 Difference]: Without dead ends: 278 [2020-12-21 22:26:28,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 118 SyntacticMatches, 44 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7244 ImplicationChecksByTransitivity, 44.8s TimeCoverageRelationStatistics Valid=1426, Invalid=18034, Unknown=0, NotChecked=0, Total=19460 [2020-12-21 22:26:28,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-12-21 22:26:28,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 143. [2020-12-21 22:26:28,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-12-21 22:26:28,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 154 transitions. [2020-12-21 22:26:28,088 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 154 transitions. Word has length 137 [2020-12-21 22:26:28,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:26:28,089 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 154 transitions. [2020-12-21 22:26:28,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-12-21 22:26:28,089 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 154 transitions. [2020-12-21 22:26:28,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-21 22:26:28,090 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:26:28,090 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:26:28,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:26:28,292 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:26:28,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:26:28,293 INFO L82 PathProgramCache]: Analyzing trace with hash -337097908, now seen corresponding path program 11 times [2020-12-21 22:26:28,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:26:28,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303439926] [2020-12-21 22:26:28,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:26:28,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:26:28,749 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-12-21 22:26:28,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303439926] [2020-12-21 22:26:28,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035531016] [2020-12-21 22:26:28,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:26:29,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-21 22:26:29,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:26:29,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 22:26:29,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:26:30,789 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-12-21 22:26:30,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:26:30,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2020-12-21 22:26:30,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340466604] [2020-12-21 22:26:30,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-21 22:26:30,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:26:30,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-21 22:26:30,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2020-12-21 22:26:30,791 INFO L87 Difference]: Start difference. First operand 143 states and 154 transitions. Second operand 27 states. [2020-12-21 22:26:35,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:26:35,793 INFO L93 Difference]: Finished difference Result 530 states and 577 transitions. [2020-12-21 22:26:35,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-21 22:26:35,796 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 139 [2020-12-21 22:26:35,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:26:35,797 INFO L225 Difference]: With dead ends: 530 [2020-12-21 22:26:35,797 INFO L226 Difference]: Without dead ends: 175 [2020-12-21 22:26:35,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=308, Invalid=1252, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 22:26:35,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-12-21 22:26:35,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 158. [2020-12-21 22:26:35,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-12-21 22:26:35,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 168 transitions. [2020-12-21 22:26:35,832 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 168 transitions. Word has length 139 [2020-12-21 22:26:35,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:26:35,832 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 168 transitions. [2020-12-21 22:26:35,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-21 22:26:35,833 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 168 transitions. [2020-12-21 22:26:35,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-12-21 22:26:35,834 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:26:35,834 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:26:36,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 22:26:36,048 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:26:36,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:26:36,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1612014142, now seen corresponding path program 12 times [2020-12-21 22:26:36,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:26:36,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450456320] [2020-12-21 22:26:36,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:26:36,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:26:36,472 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-21 22:26:36,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450456320] [2020-12-21 22:26:36,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734775022] [2020-12-21 22:26:36,474 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:26:36,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 22:26:36,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:26:36,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 22:26:36,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:26:37,734 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-21 22:26:37,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:26:37,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2020-12-21 22:26:37,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44206008] [2020-12-21 22:26:37,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-21 22:26:37,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:26:37,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-21 22:26:37,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2020-12-21 22:26:37,738 INFO L87 Difference]: Start difference. First operand 158 states and 168 transitions. Second operand 27 states. [2020-12-21 22:26:41,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:26:41,074 INFO L93 Difference]: Finished difference Result 174 states and 184 transitions. [2020-12-21 22:26:41,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 22:26:41,077 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 157 [2020-12-21 22:26:41,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:26:41,079 INFO L225 Difference]: With dead ends: 174 [2020-12-21 22:26:41,079 INFO L226 Difference]: Without dead ends: 170 [2020-12-21 22:26:41,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=299, Invalid=961, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 22:26:41,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-21 22:26:41,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 160. [2020-12-21 22:26:41,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-12-21 22:26:41,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 170 transitions. [2020-12-21 22:26:41,107 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 170 transitions. Word has length 157 [2020-12-21 22:26:41,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:26:41,108 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 170 transitions. [2020-12-21 22:26:41,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-21 22:26:41,108 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 170 transitions. [2020-12-21 22:26:41,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-21 22:26:41,109 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:26:41,109 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:26:41,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 22:26:41,324 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:26:41,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:26:41,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1284366496, now seen corresponding path program 13 times [2020-12-21 22:26:41,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:26:41,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100255115] [2020-12-21 22:26:41,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:26:41,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:26:44,115 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 18 [2020-12-21 22:26:44,285 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2020-12-21 22:26:44,889 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2020-12-21 22:26:45,110 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2020-12-21 22:26:45,348 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2020-12-21 22:26:45,610 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-21 22:26:45,867 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-12-21 22:26:46,185 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-21 22:26:46,495 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-12-21 22:26:46,807 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2020-12-21 22:26:47,098 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-12-21 22:26:47,355 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-12-21 22:26:47,607 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-12-21 22:26:48,095 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2020-12-21 22:26:48,350 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2020-12-21 22:26:48,619 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-12-21 22:26:48,888 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-12-21 22:26:49,187 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-21 22:26:49,514 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-12-21 22:26:49,898 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 38 [2020-12-21 22:26:50,276 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 38 [2020-12-21 22:26:50,595 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-12-21 22:26:50,925 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-12-21 22:26:51,208 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2020-12-21 22:26:51,475 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-12-21 22:26:51,745 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-12-21 22:26:53,178 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-12-21 22:26:54,066 WARN L197 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2020-12-21 22:26:54,581 WARN L197 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2020-12-21 22:26:54,978 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-12-21 22:26:55,386 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-12-21 22:26:55,765 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-12-21 22:26:56,156 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2020-12-21 22:26:56,521 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-12-21 22:26:56,903 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-12-21 22:26:57,272 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2020-12-21 22:26:57,627 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2020-12-21 22:26:57,997 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-21 22:26:58,659 WARN L197 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-12-21 22:26:59,160 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-12-21 22:26:59,534 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2020-12-21 22:26:59,901 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-12-21 22:27:00,278 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2020-12-21 22:27:00,655 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-12-21 22:27:01,037 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-12-21 22:27:01,438 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2020-12-21 22:27:16,663 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 30 proven. 366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:27:16,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100255115] [2020-12-21 22:27:16,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144071672] [2020-12-21 22:27:16,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:27:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:27:16,818 WARN L261 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 262 conjunts are in the unsatisfiable core [2020-12-21 22:27:16,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:27:30,976 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:27:31,496 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 395 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 22:27:31,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:27:31,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 33] total 100 [2020-12-21 22:27:31,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014373491] [2020-12-21 22:27:31,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-12-21 22:27:31,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:27:31,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-12-21 22:27:31,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=637, Invalid=9263, Unknown=0, NotChecked=0, Total=9900 [2020-12-21 22:27:31,499 INFO L87 Difference]: Start difference. First operand 160 states and 170 transitions. Second operand 100 states. [2020-12-21 22:27:34,741 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 17 [2020-12-21 22:27:35,328 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2020-12-21 22:27:36,200 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2020-12-21 22:27:36,681 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-12-21 22:27:37,237 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 32 [2020-12-21 22:27:37,756 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 28 [2020-12-21 22:27:38,488 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 30 [2020-12-21 22:27:39,234 WARN L197 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 32 [2020-12-21 22:27:39,986 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 32 [2020-12-21 22:27:40,753 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 34 [2020-12-21 22:27:41,572 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 37 [2020-12-21 22:27:42,260 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 36 [2020-12-21 22:27:43,019 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 36 [2020-12-21 22:27:44,221 WARN L197 SmtUtils]: Spent 748.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2020-12-21 22:27:45,463 WARN L197 SmtUtils]: Spent 636.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 66