/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/loop-acceleration/nested_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:26:14,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:26:14,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:26:14,990 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:26:14,990 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:26:14,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:26:14,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:26:15,006 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:26:15,010 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:26:15,016 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:26:15,018 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:26:15,019 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:26:15,020 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:26:15,023 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:26:15,024 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:26:15,026 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:26:15,027 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:26:15,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:26:15,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:26:15,052 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:26:15,054 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:26:15,056 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:26:15,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:26:15,059 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:26:15,076 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:26:15,086 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:26:15,087 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:26:15,088 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:26:15,089 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:26:15,136 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:26:15,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:26:15,140 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:26:15,140 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:26:15,141 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:26:15,141 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:26:15,141 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:26:15,141 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:26:15,142 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:26:15,142 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:26:15,143 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:26:15,143 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:26:15,143 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:26:15,143 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:26:15,144 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:26:15,144 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:26:15,144 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:26:15,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:26:15,145 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:26:15,145 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:26:15,145 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:26:15,145 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:26:15,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:26:15,146 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:26:15,146 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:26:15,146 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:26:15,531 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:26:15,559 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:26:15,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:26:15,563 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:26:15,564 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:26:15,564 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/nested_1-2.c [2020-12-22 04:26:15,649 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cfaf17c4/d7b3980455ef4be2bd493d6cb4c5382c/FLAG496a9dc94 [2020-12-22 04:26:16,260 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:26:16,261 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/nested_1-2.c [2020-12-22 04:26:16,267 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cfaf17c4/d7b3980455ef4be2bd493d6cb4c5382c/FLAG496a9dc94 [2020-12-22 04:26:16,610 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cfaf17c4/d7b3980455ef4be2bd493d6cb4c5382c [2020-12-22 04:26:16,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:26:16,615 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:26:16,630 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:26:16,630 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:26:16,634 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:26:16,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:26:16" (1/1) ... [2020-12-22 04:26:16,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62977539 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:16, skipping insertion in model container [2020-12-22 04:26:16,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:26:16" (1/1) ... [2020-12-22 04:26:16,647 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:26:16,662 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:26:16,812 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/loop-acceleration/nested_1-2.c[322,335] [2020-12-22 04:26:16,824 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:26:16,833 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:26:16,846 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/loop-acceleration/nested_1-2.c[322,335] [2020-12-22 04:26:16,850 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:26:16,865 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:26:16,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:16 WrapperNode [2020-12-22 04:26:16,865 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:26:16,867 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:26:16,867 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:26:16,867 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:26:16,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:16" (1/1) ... [2020-12-22 04:26:16,883 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:16" (1/1) ... [2020-12-22 04:26:16,901 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:26:16,902 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:26:16,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:26:16,902 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:26:16,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:16" (1/1) ... [2020-12-22 04:26:16,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:16" (1/1) ... [2020-12-22 04:26:16,912 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:16" (1/1) ... [2020-12-22 04:26:16,913 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:16" (1/1) ... [2020-12-22 04:26:16,916 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:16" (1/1) ... [2020-12-22 04:26:16,920 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:16" (1/1) ... [2020-12-22 04:26:16,921 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:16" (1/1) ... [2020-12-22 04:26:16,923 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:26:16,924 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:26:16,924 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:26:16,924 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:26:16,925 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:26:17,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:26:17,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:26:17,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:26:17,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:26:17,271 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:26:17,271 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-22 04:26:17,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:26:17 BoogieIcfgContainer [2020-12-22 04:26:17,273 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:26:17,275 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:26:17,275 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:26:17,278 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:26:17,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:26:16" (1/3) ... [2020-12-22 04:26:17,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f62239 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:26:17, skipping insertion in model container [2020-12-22 04:26:17,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:16" (2/3) ... [2020-12-22 04:26:17,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f62239 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:26:17, skipping insertion in model container [2020-12-22 04:26:17,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:26:17" (3/3) ... [2020-12-22 04:26:17,283 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_1-2.c [2020-12-22 04:26:17,290 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:26:17,294 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:26:17,314 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:26:17,342 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:26:17,342 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:26:17,342 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:26:17,343 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:26:17,343 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:26:17,343 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:26:17,343 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:26:17,343 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:26:17,378 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-22 04:26:17,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 04:26:17,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:17,386 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 04:26:17,386 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:17,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:17,395 INFO L82 PathProgramCache]: Analyzing trace with hash 889646744, now seen corresponding path program 1 times [2020-12-22 04:26:17,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:17,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109748683] [2020-12-22 04:26:17,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:17,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:17,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:17,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109748683] [2020-12-22 04:26:17,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:26:17,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:26:17,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656787497] [2020-12-22 04:26:17,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:26:17,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:17,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:26:17,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:26:17,695 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2020-12-22 04:26:17,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:17,727 INFO L93 Difference]: Finished difference Result 25 states and 37 transitions. [2020-12-22 04:26:17,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:26:17,729 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-22 04:26:17,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:17,741 INFO L225 Difference]: With dead ends: 25 [2020-12-22 04:26:17,741 INFO L226 Difference]: Without dead ends: 12 [2020-12-22 04:26:17,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:26:17,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-22 04:26:17,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2020-12-22 04:26:17,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-22 04:26:17,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-12-22 04:26:17,785 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2020-12-22 04:26:17,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:17,785 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-12-22 04:26:17,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:26:17,786 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-12-22 04:26:17,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 04:26:17,786 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:17,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:17,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:26:17,788 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:17,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:17,793 INFO L82 PathProgramCache]: Analyzing trace with hash 704531011, now seen corresponding path program 1 times [2020-12-22 04:26:17,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:17,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197393970] [2020-12-22 04:26:17,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:17,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:17,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197393970] [2020-12-22 04:26:17,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:26:17,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:26:17,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781325369] [2020-12-22 04:26:17,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:26:17,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:17,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:26:17,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:26:17,907 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 3 states. [2020-12-22 04:26:17,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:17,928 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2020-12-22 04:26:17,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:26:17,929 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-22 04:26:17,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:17,930 INFO L225 Difference]: With dead ends: 18 [2020-12-22 04:26:17,930 INFO L226 Difference]: Without dead ends: 11 [2020-12-22 04:26:17,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:26:17,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-22 04:26:17,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-22 04:26:17,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-22 04:26:17,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-12-22 04:26:17,940 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2020-12-22 04:26:17,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:17,940 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-12-22 04:26:17,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:26:17,941 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-12-22 04:26:17,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:26:17,942 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:17,942 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:17,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 04:26:17,943 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:17,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:17,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1982141191, now seen corresponding path program 1 times [2020-12-22 04:26:17,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:17,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156308083] [2020-12-22 04:26:17,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:18,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:18,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:18,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156308083] [2020-12-22 04:26:18,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153992287] [2020-12-22 04:26:18,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:18,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:18,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 04:26:18,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:18,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:18,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:18,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-22 04:26:18,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644908624] [2020-12-22 04:26:18,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:26:18,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:18,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:26:18,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:26:18,225 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2020-12-22 04:26:18,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:18,306 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2020-12-22 04:26:18,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:26:18,307 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-12-22 04:26:18,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:18,308 INFO L225 Difference]: With dead ends: 29 [2020-12-22 04:26:18,308 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 04:26:18,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:26:18,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 04:26:18,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2020-12-22 04:26:18,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 04:26:18,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-12-22 04:26:18,315 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2020-12-22 04:26:18,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:18,315 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-12-22 04:26:18,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:26:18,315 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-12-22 04:26:18,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 04:26:18,316 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:18,316 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:18,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 04:26:18,530 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:18,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:18,532 INFO L82 PathProgramCache]: Analyzing trace with hash 311415160, now seen corresponding path program 2 times [2020-12-22 04:26:18,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:18,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18321737] [2020-12-22 04:26:18,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:18,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:18,615 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 04:26:18,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18321737] [2020-12-22 04:26:18,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702830212] [2020-12-22 04:26:18,616 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 [2020-12-22 04:26:18,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:26:18,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:18,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:26:18,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:18,762 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 04:26:18,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:18,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-22 04:26:18,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457542618] [2020-12-22 04:26:18,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:26:18,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:18,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:26:18,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:26:18,765 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 8 states. [2020-12-22 04:26:18,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:18,978 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2020-12-22 04:26:18,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 04:26:18,979 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-12-22 04:26:18,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:18,980 INFO L225 Difference]: With dead ends: 41 [2020-12-22 04:26:18,980 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 04:26:18,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:26:18,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 04:26:18,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2020-12-22 04:26:18,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-22 04:26:18,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-12-22 04:26:18,988 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2020-12-22 04:26:18,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:18,989 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-12-22 04:26:18,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:26:18,989 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-12-22 04:26:18,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 04:26:18,990 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:18,990 INFO L422 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:19,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:19,205 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:19,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:19,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1517479077, now seen corresponding path program 3 times [2020-12-22 04:26:19,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:19,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645573952] [2020-12-22 04:26:19,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:19,330 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 35 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-12-22 04:26:19,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645573952] [2020-12-22 04:26:19,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278345916] [2020-12-22 04:26:19,341 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 [2020-12-22 04:26:19,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 04:26:19,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:19,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 04:26:19,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:19,504 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-22 04:26:19,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:19,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 04:26:19,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689269922] [2020-12-22 04:26:19,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:26:19,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:19,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:26:19,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:26:19,507 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 7 states. [2020-12-22 04:26:19,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:19,536 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-12-22 04:26:19,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:26:19,537 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-12-22 04:26:19,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:19,537 INFO L225 Difference]: With dead ends: 46 [2020-12-22 04:26:19,538 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 04:26:19,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:26:19,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 04:26:19,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-22 04:26:19,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 04:26:19,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-12-22 04:26:19,545 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 24 [2020-12-22 04:26:19,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:19,545 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-12-22 04:26:19,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:26:19,545 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-12-22 04:26:19,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 04:26:19,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:19,546 INFO L422 BasicCegarLoop]: trace histogram [12, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:19,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:19,762 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:19,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:19,764 INFO L82 PathProgramCache]: Analyzing trace with hash 640077219, now seen corresponding path program 4 times [2020-12-22 04:26:19,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:19,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527288908] [2020-12-22 04:26:19,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:19,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:19,859 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 53 proven. 10 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-22 04:26:19,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527288908] [2020-12-22 04:26:19,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663450982] [2020-12-22 04:26:19,860 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 [2020-12-22 04:26:19,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:26:19,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:19,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 04:26:19,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 53 proven. 10 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-22 04:26:19,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:19,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 04:26:19,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278201378] [2020-12-22 04:26:19,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:26:19,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:19,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:26:19,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:26:19,961 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 8 states. [2020-12-22 04:26:19,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:19,995 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2020-12-22 04:26:19,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:26:19,995 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-12-22 04:26:19,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:19,996 INFO L225 Difference]: With dead ends: 51 [2020-12-22 04:26:19,996 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 04:26:19,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:26:19,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 04:26:20,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-22 04:26:20,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 04:26:20,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-12-22 04:26:20,003 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 27 [2020-12-22 04:26:20,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:20,004 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-12-22 04:26:20,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:26:20,004 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-12-22 04:26:20,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 04:26:20,005 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:20,005 INFO L422 BasicCegarLoop]: trace histogram [15, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:20,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:20,219 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:20,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:20,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1692920805, now seen corresponding path program 5 times [2020-12-22 04:26:20,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:20,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401879966] [2020-12-22 04:26:20,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:20,359 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 75 proven. 15 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-22 04:26:20,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401879966] [2020-12-22 04:26:20,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030670401] [2020-12-22 04:26:20,360 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 [2020-12-22 04:26:20,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 04:26:20,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:20,412 WARN L261 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 04:26:20,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:20,495 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 114 proven. 15 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-22 04:26:20,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:20,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 04:26:20,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368940590] [2020-12-22 04:26:20,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:26:20,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:20,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:26:20,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:26:20,500 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 9 states. [2020-12-22 04:26:20,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:20,548 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-12-22 04:26:20,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:26:20,548 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-12-22 04:26:20,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:20,549 INFO L225 Difference]: With dead ends: 56 [2020-12-22 04:26:20,549 INFO L226 Difference]: Without dead ends: 34 [2020-12-22 04:26:20,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:26:20,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-22 04:26:20,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-22 04:26:20,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-22 04:26:20,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-12-22 04:26:20,557 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 30 [2020-12-22 04:26:20,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:20,557 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-12-22 04:26:20,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:26:20,557 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-12-22 04:26:20,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 04:26:20,558 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:20,558 INFO L422 BasicCegarLoop]: trace histogram [18, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:20,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 04:26:20,773 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:20,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:20,774 INFO L82 PathProgramCache]: Analyzing trace with hash 628096867, now seen corresponding path program 6 times [2020-12-22 04:26:20,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:20,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154611585] [2020-12-22 04:26:20,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:20,884 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 101 proven. 21 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2020-12-22 04:26:20,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154611585] [2020-12-22 04:26:20,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641942003] [2020-12-22 04:26:20,885 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 [2020-12-22 04:26:20,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-22 04:26:20,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:20,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 04:26:20,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:21,046 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 153 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-22 04:26:21,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:21,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 04:26:21,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323324137] [2020-12-22 04:26:21,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:26:21,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:21,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:26:21,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:26:21,049 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 10 states. [2020-12-22 04:26:21,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:21,100 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-12-22 04:26:21,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:26:21,101 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-12-22 04:26:21,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:21,102 INFO L225 Difference]: With dead ends: 61 [2020-12-22 04:26:21,102 INFO L226 Difference]: Without dead ends: 37 [2020-12-22 04:26:21,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:26:21,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-22 04:26:21,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-22 04:26:21,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 04:26:21,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-12-22 04:26:21,109 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 33 [2020-12-22 04:26:21,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:21,109 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-12-22 04:26:21,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:26:21,110 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-12-22 04:26:21,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 04:26:21,111 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:21,111 INFO L422 BasicCegarLoop]: trace histogram [21, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:21,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:21,327 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:21,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:21,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1950432475, now seen corresponding path program 7 times [2020-12-22 04:26:21,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:21,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85766991] [2020-12-22 04:26:21,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:21,475 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 131 proven. 28 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-22 04:26:21,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85766991] [2020-12-22 04:26:21,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561489354] [2020-12-22 04:26:21,476 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 [2020-12-22 04:26:21,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:21,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 04:26:21,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 131 proven. 28 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-22 04:26:21,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:21,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 04:26:21,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158043577] [2020-12-22 04:26:21,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:26:21,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:21,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:26:21,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:26:21,609 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 11 states. [2020-12-22 04:26:21,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:21,697 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-12-22 04:26:21,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:26:21,697 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-12-22 04:26:21,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:21,698 INFO L225 Difference]: With dead ends: 66 [2020-12-22 04:26:21,698 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 04:26:21,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:26:21,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 04:26:21,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-22 04:26:21,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 04:26:21,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-12-22 04:26:21,705 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 36 [2020-12-22 04:26:21,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:21,706 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-12-22 04:26:21,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:26:21,706 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-12-22 04:26:21,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 04:26:21,707 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:21,707 INFO L422 BasicCegarLoop]: trace histogram [24, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:21,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:21,923 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:21,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:21,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1424432861, now seen corresponding path program 8 times [2020-12-22 04:26:21,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:21,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210064338] [2020-12-22 04:26:21,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:21,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:22,082 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 165 proven. 36 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2020-12-22 04:26:22,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210064338] [2020-12-22 04:26:22,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031464603] [2020-12-22 04:26:22,083 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 [2020-12-22 04:26:22,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:26:22,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:22,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 04:26:22,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:22,246 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-12-22 04:26:22,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:22,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2020-12-22 04:26:22,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122581174] [2020-12-22 04:26:22,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 04:26:22,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:22,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 04:26:22,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:26:22,249 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 15 states. [2020-12-22 04:26:23,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:23,264 INFO L93 Difference]: Finished difference Result 94 states and 107 transitions. [2020-12-22 04:26:23,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-22 04:26:23,265 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-12-22 04:26:23,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:23,266 INFO L225 Difference]: With dead ends: 94 [2020-12-22 04:26:23,266 INFO L226 Difference]: Without dead ends: 66 [2020-12-22 04:26:23,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=243, Invalid=2307, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 04:26:23,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-22 04:26:23,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2020-12-22 04:26:23,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 04:26:23,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-12-22 04:26:23,277 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 39 [2020-12-22 04:26:23,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:23,278 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-12-22 04:26:23,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 04:26:23,278 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-12-22 04:26:23,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 04:26:23,279 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:23,279 INFO L422 BasicCegarLoop]: trace histogram [36, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:23,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 04:26:23,493 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:23,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:23,495 INFO L82 PathProgramCache]: Analyzing trace with hash 230023508, now seen corresponding path program 9 times [2020-12-22 04:26:23,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:23,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464116893] [2020-12-22 04:26:23,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:23,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:23,693 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 304 proven. 45 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2020-12-22 04:26:23,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464116893] [2020-12-22 04:26:23,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332719490] [2020-12-22 04:26:23,693 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 [2020-12-22 04:26:23,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-22 04:26:23,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:23,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 04:26:23,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:24,113 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 307 proven. 45 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2020-12-22 04:26:24,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:24,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 04:26:24,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250133146] [2020-12-22 04:26:24,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:26:24,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:24,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:26:24,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:26:24,116 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 13 states. [2020-12-22 04:26:24,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:24,210 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2020-12-22 04:26:24,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:26:24,211 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2020-12-22 04:26:24,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:24,212 INFO L225 Difference]: With dead ends: 101 [2020-12-22 04:26:24,212 INFO L226 Difference]: Without dead ends: 59 [2020-12-22 04:26:24,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:26:24,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-22 04:26:24,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-12-22 04:26:24,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 04:26:24,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-12-22 04:26:24,221 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 54 [2020-12-22 04:26:24,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:24,221 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-12-22 04:26:24,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:26:24,222 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-12-22 04:26:24,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 04:26:24,223 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:24,223 INFO L422 BasicCegarLoop]: trace histogram [40, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:24,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:24,430 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:24,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:24,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1228631464, now seen corresponding path program 10 times [2020-12-22 04:26:24,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:24,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928183244] [2020-12-22 04:26:24,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-12-22 04:26:24,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928183244] [2020-12-22 04:26:24,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029996965] [2020-12-22 04:26:24,579 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 [2020-12-22 04:26:24,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:26:24,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:24,622 WARN L261 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 04:26:24,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:24,724 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:26:24,744 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-12-22 04:26:24,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:24,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2020-12-22 04:26:24,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620790163] [2020-12-22 04:26:24,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:26:24,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:24,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:26:24,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:26:24,746 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 9 states. [2020-12-22 04:26:24,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:24,822 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2020-12-22 04:26:24,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:26:24,823 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-12-22 04:26:24,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:24,824 INFO L225 Difference]: With dead ends: 88 [2020-12-22 04:26:24,824 INFO L226 Difference]: Without dead ends: 84 [2020-12-22 04:26:24,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:26:24,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-22 04:26:24,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 72. [2020-12-22 04:26:24,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 04:26:24,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2020-12-22 04:26:24,837 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 58 [2020-12-22 04:26:24,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:24,837 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2020-12-22 04:26:24,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:26:24,838 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-12-22 04:26:24,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 04:26:24,839 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:24,839 INFO L422 BasicCegarLoop]: trace histogram [50, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:25,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:25,054 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:25,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:25,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1313015549, now seen corresponding path program 11 times [2020-12-22 04:26:25,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:25,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436740454] [2020-12-22 04:26:25,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:25,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 1235 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2020-12-22 04:26:25,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436740454] [2020-12-22 04:26:25,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462170183] [2020-12-22 04:26:25,236 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 [2020-12-22 04:26:26,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2020-12-22 04:26:26,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:26,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 80 conjunts are in the unsatisfiable core [2020-12-22 04:26:26,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:27,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 89 proven. 1281 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-12-22 04:26:27,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:27,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 25] total 26 [2020-12-22 04:26:27,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163865086] [2020-12-22 04:26:27,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 04:26:27,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:27,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 04:26:27,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:26:27,366 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 26 states. [2020-12-22 04:26:27,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:27,809 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2020-12-22 04:26:27,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 04:26:27,809 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 71 [2020-12-22 04:26:27,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:27,810 INFO L225 Difference]: With dead ends: 101 [2020-12-22 04:26:27,811 INFO L226 Difference]: Without dead ends: 97 [2020-12-22 04:26:27,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:26:27,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-22 04:26:27,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 85. [2020-12-22 04:26:27,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-22 04:26:27,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2020-12-22 04:26:27,826 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 71 [2020-12-22 04:26:27,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:27,826 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2020-12-22 04:26:27,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 04:26:27,827 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2020-12-22 04:26:27,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 04:26:27,828 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:27,828 INFO L422 BasicCegarLoop]: trace histogram [60, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:28,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 04:26:28,034 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:28,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:28,035 INFO L82 PathProgramCache]: Analyzing trace with hash -2025848776, now seen corresponding path program 12 times [2020-12-22 04:26:28,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:28,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923548783] [2020-12-22 04:26:28,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:28,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:28,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2181 backedges. 0 proven. 1851 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-22 04:26:28,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923548783] [2020-12-22 04:26:28,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905321212] [2020-12-22 04:26:28,215 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 [2020-12-22 04:26:28,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2020-12-22 04:26:28,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:28,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 04:26:28,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:29,046 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:26:29,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2181 backedges. 0 proven. 1851 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-22 04:26:29,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:29,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 11 [2020-12-22 04:26:29,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069391792] [2020-12-22 04:26:29,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:26:29,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:29,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:26:29,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:26:29,078 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand 11 states. [2020-12-22 04:26:29,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:29,198 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2020-12-22 04:26:29,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:26:29,198 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 84 [2020-12-22 04:26:29,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:29,199 INFO L225 Difference]: With dead ends: 114 [2020-12-22 04:26:29,199 INFO L226 Difference]: Without dead ends: 110 [2020-12-22 04:26:29,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:26:29,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-22 04:26:29,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 98. [2020-12-22 04:26:29,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-22 04:26:29,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 105 transitions. [2020-12-22 04:26:29,214 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 105 transitions. Word has length 84 [2020-12-22 04:26:29,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:29,215 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 105 transitions. [2020-12-22 04:26:29,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:26:29,215 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 105 transitions. [2020-12-22 04:26:29,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 04:26:29,217 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:29,217 INFO L422 BasicCegarLoop]: trace histogram [70, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:29,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 04:26:29,421 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:29,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:29,422 INFO L82 PathProgramCache]: Analyzing trace with hash -771025117, now seen corresponding path program 13 times [2020-12-22 04:26:29,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:29,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658662914] [2020-12-22 04:26:29,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:29,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:29,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 0 proven. 2590 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-12-22 04:26:29,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658662914] [2020-12-22 04:26:29,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366025794] [2020-12-22 04:26:29,670 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 [2020-12-22 04:26:29,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:29,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 04:26:29,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:29,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 0 proven. 2590 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-12-22 04:26:29,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:29,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 04:26:29,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608223138] [2020-12-22 04:26:29,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:26:29,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:29,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:26:29,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:26:29,911 INFO L87 Difference]: Start difference. First operand 98 states and 105 transitions. Second operand 11 states. [2020-12-22 04:26:30,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:30,025 INFO L93 Difference]: Finished difference Result 127 states and 136 transitions. [2020-12-22 04:26:30,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:26:30,026 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 97 [2020-12-22 04:26:30,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:30,027 INFO L225 Difference]: With dead ends: 127 [2020-12-22 04:26:30,027 INFO L226 Difference]: Without dead ends: 123 [2020-12-22 04:26:30,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:26:30,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-22 04:26:30,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 111. [2020-12-22 04:26:30,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-22 04:26:30,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 119 transitions. [2020-12-22 04:26:30,043 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 119 transitions. Word has length 97 [2020-12-22 04:26:30,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:30,044 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 119 transitions. [2020-12-22 04:26:30,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:26:30,044 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 119 transitions. [2020-12-22 04:26:30,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 04:26:30,045 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:30,046 INFO L422 BasicCegarLoop]: trace histogram [80, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:30,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 04:26:30,261 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:30,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:30,262 INFO L82 PathProgramCache]: Analyzing trace with hash 252433944, now seen corresponding path program 14 times [2020-12-22 04:26:30,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:30,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812218973] [2020-12-22 04:26:30,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:30,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3892 backedges. 0 proven. 3452 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-12-22 04:26:30,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812218973] [2020-12-22 04:26:30,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839314056] [2020-12-22 04:26:30,582 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:30,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:26:30,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:30,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 04:26:30,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:30,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3892 backedges. 0 proven. 3452 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-12-22 04:26:30,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:30,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 04:26:30,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107812753] [2020-12-22 04:26:30,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 04:26:30,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:30,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 04:26:30,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:26:30,867 INFO L87 Difference]: Start difference. First operand 111 states and 119 transitions. Second operand 12 states. [2020-12-22 04:26:31,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:31,005 INFO L93 Difference]: Finished difference Result 140 states and 150 transitions. [2020-12-22 04:26:31,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:26:31,005 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 110 [2020-12-22 04:26:31,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:31,007 INFO L225 Difference]: With dead ends: 140 [2020-12-22 04:26:31,007 INFO L226 Difference]: Without dead ends: 136 [2020-12-22 04:26:31,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:26:31,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-22 04:26:31,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 124. [2020-12-22 04:26:31,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-12-22 04:26:31,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 133 transitions. [2020-12-22 04:26:31,033 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 133 transitions. Word has length 110 [2020-12-22 04:26:31,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:31,033 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 133 transitions. [2020-12-22 04:26:31,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 04:26:31,034 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 133 transitions. [2020-12-22 04:26:31,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-12-22 04:26:31,037 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:31,037 INFO L422 BasicCegarLoop]: trace histogram [90, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:31,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:31,251 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:31,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:31,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1225667261, now seen corresponding path program 15 times [2020-12-22 04:26:31,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:31,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435117875] [2020-12-22 04:26:31,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:31,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:31,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4932 backedges. 0 proven. 4437 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-12-22 04:26:31,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435117875] [2020-12-22 04:26:31,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41255942] [2020-12-22 04:26:31,579 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:33,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2020-12-22 04:26:33,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:33,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 04:26:33,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:33,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4932 backedges. 0 proven. 4437 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-12-22 04:26:33,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:33,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 04:26:33,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588129782] [2020-12-22 04:26:33,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:26:33,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:33,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:26:33,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:26:33,355 INFO L87 Difference]: Start difference. First operand 124 states and 133 transitions. Second operand 13 states. [2020-12-22 04:26:33,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:33,522 INFO L93 Difference]: Finished difference Result 153 states and 164 transitions. [2020-12-22 04:26:33,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:26:33,523 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 123 [2020-12-22 04:26:33,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:33,524 INFO L225 Difference]: With dead ends: 153 [2020-12-22 04:26:33,524 INFO L226 Difference]: Without dead ends: 149 [2020-12-22 04:26:33,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 120 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:26:33,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-12-22 04:26:33,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 137. [2020-12-22 04:26:33,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-22 04:26:33,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 147 transitions. [2020-12-22 04:26:33,541 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 147 transitions. Word has length 123 [2020-12-22 04:26:33,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:33,541 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 147 transitions. [2020-12-22 04:26:33,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:26:33,541 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 147 transitions. [2020-12-22 04:26:33,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 04:26:33,543 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:33,543 INFO L422 BasicCegarLoop]: trace histogram [100, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:33,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 04:26:33,748 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:33,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:33,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1191832584, now seen corresponding path program 16 times [2020-12-22 04:26:33,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:33,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9908800] [2020-12-22 04:26:33,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:33,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:34,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6095 backedges. 0 proven. 5545 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2020-12-22 04:26:34,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9908800] [2020-12-22 04:26:34,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016658616] [2020-12-22 04:26:34,059 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:34,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:26:34,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:34,109 WARN L261 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 04:26:34,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:34,286 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:26:34,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6095 backedges. 0 proven. 5545 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2020-12-22 04:26:34,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:34,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 15 [2020-12-22 04:26:34,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56831668] [2020-12-22 04:26:34,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 04:26:34,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:34,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 04:26:34,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:26:34,350 INFO L87 Difference]: Start difference. First operand 137 states and 147 transitions. Second operand 15 states. [2020-12-22 04:26:34,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:34,578 INFO L93 Difference]: Finished difference Result 166 states and 178 transitions. [2020-12-22 04:26:34,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 04:26:34,578 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 136 [2020-12-22 04:26:34,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:34,580 INFO L225 Difference]: With dead ends: 166 [2020-12-22 04:26:34,580 INFO L226 Difference]: Without dead ends: 162 [2020-12-22 04:26:34,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:26:34,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-12-22 04:26:34,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 150. [2020-12-22 04:26:34,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-22 04:26:34,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 161 transitions. [2020-12-22 04:26:34,599 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 161 transitions. Word has length 136 [2020-12-22 04:26:34,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:34,599 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 161 transitions. [2020-12-22 04:26:34,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 04:26:34,600 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 161 transitions. [2020-12-22 04:26:34,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 04:26:34,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:34,601 INFO L422 BasicCegarLoop]: trace histogram [110, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:34,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 04:26:34,814 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:34,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:34,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1952652131, now seen corresponding path program 17 times [2020-12-22 04:26:34,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:34,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127468950] [2020-12-22 04:26:34,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:34,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:35,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 6776 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2020-12-22 04:26:35,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127468950] [2020-12-22 04:26:35,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862799130] [2020-12-22 04:26:35,195 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:40,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2020-12-22 04:26:40,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:40,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 183 conjunts are in the unsatisfiable core [2020-12-22 04:26:40,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:43,422 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 10 proven. 7050 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2020-12-22 04:26:43,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:43,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 67] total 68 [2020-12-22 04:26:43,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573316674] [2020-12-22 04:26:43,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-22 04:26:43,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:43,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-22 04:26:43,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=4305, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 04:26:43,427 INFO L87 Difference]: Start difference. First operand 150 states and 161 transitions. Second operand 68 states. [2020-12-22 04:26:45,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:45,999 INFO L93 Difference]: Finished difference Result 260 states and 281 transitions. [2020-12-22 04:26:45,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-22 04:26:45,999 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 149 [2020-12-22 04:26:46,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:46,001 INFO L225 Difference]: With dead ends: 260 [2020-12-22 04:26:46,001 INFO L226 Difference]: Without dead ends: 175 [2020-12-22 04:26:46,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=251, Invalid=4305, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 04:26:46,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-12-22 04:26:46,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 163. [2020-12-22 04:26:46,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-22 04:26:46,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 172 transitions. [2020-12-22 04:26:46,022 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 172 transitions. Word has length 149 [2020-12-22 04:26:46,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:46,023 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 172 transitions. [2020-12-22 04:26:46,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-22 04:26:46,023 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 172 transitions. [2020-12-22 04:26:46,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-12-22 04:26:46,025 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:46,025 INFO L422 BasicCegarLoop]: trace histogram [120, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:46,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:46,234 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:46,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:46,235 INFO L82 PathProgramCache]: Analyzing trace with hash -364070440, now seen corresponding path program 18 times [2020-12-22 04:26:46,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:46,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113388904] [2020-12-22 04:26:46,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:46,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:46,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8790 backedges. 0 proven. 8130 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-12-22 04:26:46,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113388904] [2020-12-22 04:26:46,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302871715] [2020-12-22 04:26:46,593 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:52,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2020-12-22 04:26:52,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:52,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 131 conjunts are in the unsatisfiable core [2020-12-22 04:26:52,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:54,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8790 backedges. 59 proven. 8274 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2020-12-22 04:26:54,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:54,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 47] total 48 [2020-12-22 04:26:54,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633891877] [2020-12-22 04:26:54,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 04:26:54,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:54,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 04:26:54,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2075, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:26:54,584 INFO L87 Difference]: Start difference. First operand 163 states and 172 transitions. Second operand 48 states. [2020-12-22 04:26:55,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:55,985 INFO L93 Difference]: Finished difference Result 192 states and 203 transitions. [2020-12-22 04:26:55,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 04:26:55,986 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 162 [2020-12-22 04:26:55,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:55,987 INFO L225 Difference]: With dead ends: 192 [2020-12-22 04:26:55,987 INFO L226 Difference]: Without dead ends: 188 [2020-12-22 04:26:55,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=181, Invalid=2075, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:26:55,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-22 04:26:56,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 176. [2020-12-22 04:26:56,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-12-22 04:26:56,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 186 transitions. [2020-12-22 04:26:56,009 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 186 transitions. Word has length 162 [2020-12-22 04:26:56,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:56,009 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 186 transitions. [2020-12-22 04:26:56,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 04:26:56,009 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 186 transitions. [2020-12-22 04:26:56,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-12-22 04:26:56,011 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:56,011 INFO L422 BasicCegarLoop]: trace histogram [130, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:56,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:56,217 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:56,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:56,218 INFO L82 PathProgramCache]: Analyzing trace with hash 869335427, now seen corresponding path program 19 times [2020-12-22 04:26:56,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:56,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591372726] [2020-12-22 04:26:56,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 10322 backedges. 0 proven. 9607 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-12-22 04:26:56,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591372726] [2020-12-22 04:26:56,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669499751] [2020-12-22 04:26:56,684 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:56,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:56,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 04:26:56,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:57,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10322 backedges. 0 proven. 9607 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-12-22 04:26:57,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:57,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 04:26:57,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912490097] [2020-12-22 04:26:57,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:26:57,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:57,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:26:57,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:26:57,150 INFO L87 Difference]: Start difference. First operand 176 states and 186 transitions. Second operand 17 states. [2020-12-22 04:26:57,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:57,442 INFO L93 Difference]: Finished difference Result 205 states and 217 transitions. [2020-12-22 04:26:57,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:26:57,443 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 175 [2020-12-22 04:26:57,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:57,444 INFO L225 Difference]: With dead ends: 205 [2020-12-22 04:26:57,444 INFO L226 Difference]: Without dead ends: 201 [2020-12-22 04:26:57,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:26:57,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-12-22 04:26:57,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 189. [2020-12-22 04:26:57,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-22 04:26:57,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 200 transitions. [2020-12-22 04:26:57,467 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 200 transitions. Word has length 175 [2020-12-22 04:26:57,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:57,467 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 200 transitions. [2020-12-22 04:26:57,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:26:57,467 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 200 transitions. [2020-12-22 04:26:57,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-12-22 04:26:57,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:57,469 INFO L422 BasicCegarLoop]: trace histogram [140, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:57,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:57,676 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:57,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:57,677 INFO L82 PathProgramCache]: Analyzing trace with hash -488781896, now seen corresponding path program 20 times [2020-12-22 04:26:57,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:57,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343586759] [2020-12-22 04:26:57,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:58,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11977 backedges. 0 proven. 11207 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2020-12-22 04:26:58,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343586759] [2020-12-22 04:26:58,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117510779] [2020-12-22 04:26:58,144 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:58,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:26:58,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:58,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 04:26:58,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:58,614 INFO L134 CoverageAnalysis]: Checked inductivity of 11977 backedges. 0 proven. 11207 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2020-12-22 04:26:58,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:58,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 04:26:58,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553927700] [2020-12-22 04:26:58,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 04:26:58,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:58,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 04:26:58,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:26:58,617 INFO L87 Difference]: Start difference. First operand 189 states and 200 transitions. Second operand 18 states. [2020-12-22 04:26:58,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:58,971 INFO L93 Difference]: Finished difference Result 218 states and 231 transitions. [2020-12-22 04:26:58,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 04:26:58,972 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 188 [2020-12-22 04:26:58,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:58,974 INFO L225 Difference]: With dead ends: 218 [2020-12-22 04:26:58,974 INFO L226 Difference]: Without dead ends: 214 [2020-12-22 04:26:58,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 188 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:26:58,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-12-22 04:26:59,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 202. [2020-12-22 04:26:59,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-12-22 04:26:59,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 214 transitions. [2020-12-22 04:26:59,009 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 214 transitions. Word has length 188 [2020-12-22 04:26:59,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:59,009 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 214 transitions. [2020-12-22 04:26:59,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 04:26:59,010 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 214 transitions. [2020-12-22 04:26:59,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-12-22 04:26:59,011 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:59,011 INFO L422 BasicCegarLoop]: trace histogram [150, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:59,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 04:26:59,225 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:59,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:59,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1412267939, now seen corresponding path program 21 times [2020-12-22 04:26:59,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:59,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624638089] [2020-12-22 04:26:59,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:59,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:59,732 INFO L134 CoverageAnalysis]: Checked inductivity of 13755 backedges. 0 proven. 12930 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2020-12-22 04:26:59,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624638089] [2020-12-22 04:26:59,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413192456] [2020-12-22 04:26:59,732 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:05,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2020-12-22 04:27:05,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:05,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 259 conjunts are in the unsatisfiable core [2020-12-22 04:27:05,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:11,869 INFO L134 CoverageAnalysis]: Checked inductivity of 13755 backedges. 154 proven. 13228 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2020-12-22 04:27:11,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:11,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 90] total 91 [2020-12-22 04:27:11,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162708871] [2020-12-22 04:27:11,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-12-22 04:27:11,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:11,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-12-22 04:27:11,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=7795, Unknown=0, NotChecked=0, Total=8190 [2020-12-22 04:27:11,877 INFO L87 Difference]: Start difference. First operand 202 states and 214 transitions. Second operand 91 states. [2020-12-22 04:27:16,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:16,071 INFO L93 Difference]: Finished difference Result 416 states and 443 transitions. [2020-12-22 04:27:16,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-12-22 04:27:16,072 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 201 [2020-12-22 04:27:16,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:16,073 INFO L225 Difference]: With dead ends: 416 [2020-12-22 04:27:16,073 INFO L226 Difference]: Without dead ends: 227 [2020-12-22 04:27:16,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 123 SyntacticMatches, 7 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2939 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=405, Invalid=7967, Unknown=0, NotChecked=0, Total=8372 [2020-12-22 04:27:16,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-12-22 04:27:16,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 215. [2020-12-22 04:27:16,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-12-22 04:27:16,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 225 transitions. [2020-12-22 04:27:16,106 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 225 transitions. Word has length 201 [2020-12-22 04:27:16,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:16,106 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 225 transitions. [2020-12-22 04:27:16,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-12-22 04:27:16,106 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 225 transitions. [2020-12-22 04:27:16,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-12-22 04:27:16,107 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:16,108 INFO L422 BasicCegarLoop]: trace histogram [160, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:16,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 04:27:16,316 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:16,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:16,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1661518440, now seen corresponding path program 22 times [2020-12-22 04:27:16,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:16,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116397963] [2020-12-22 04:27:16,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:16,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:16,888 INFO L134 CoverageAnalysis]: Checked inductivity of 15656 backedges. 0 proven. 14776 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2020-12-22 04:27:16,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116397963] [2020-12-22 04:27:16,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976615556] [2020-12-22 04:27:16,889 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:16,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:27:16,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:16,948 WARN L261 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 04:27:16,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:17,202 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:27:17,307 INFO L134 CoverageAnalysis]: Checked inductivity of 15656 backedges. 0 proven. 14776 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2020-12-22 04:27:17,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:17,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 21 [2020-12-22 04:27:17,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633743500] [2020-12-22 04:27:17,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:27:17,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:17,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:27:17,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:27:17,309 INFO L87 Difference]: Start difference. First operand 215 states and 225 transitions. Second operand 21 states. [2020-12-22 04:27:17,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:17,795 INFO L93 Difference]: Finished difference Result 244 states and 256 transitions. [2020-12-22 04:27:17,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 04:27:17,796 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 214 [2020-12-22 04:27:17,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:17,798 INFO L225 Difference]: With dead ends: 244 [2020-12-22 04:27:17,798 INFO L226 Difference]: Without dead ends: 240 [2020-12-22 04:27:17,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:27:17,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-12-22 04:27:17,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 228. [2020-12-22 04:27:17,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-12-22 04:27:17,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 239 transitions. [2020-12-22 04:27:17,831 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 239 transitions. Word has length 214 [2020-12-22 04:27:17,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:17,831 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 239 transitions. [2020-12-22 04:27:17,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:27:17,831 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 239 transitions. [2020-12-22 04:27:17,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-12-22 04:27:17,832 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:17,833 INFO L422 BasicCegarLoop]: trace histogram [170, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:18,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:18,042 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:18,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:18,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1981114941, now seen corresponding path program 23 times [2020-12-22 04:27:18,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:18,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145019077] [2020-12-22 04:27:18,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:18,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 17680 backedges. 0 proven. 16745 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2020-12-22 04:27:18,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145019077] [2020-12-22 04:27:18,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117379266] [2020-12-22 04:27:18,700 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:41,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2020-12-22 04:27:41,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:41,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 180 conjunts are in the unsatisfiable core [2020-12-22 04:27:41,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:45,560 INFO L134 CoverageAnalysis]: Checked inductivity of 17680 backedges. 133 proven. 16870 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2020-12-22 04:27:45,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:45,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 62] total 63 [2020-12-22 04:27:45,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489573424] [2020-12-22 04:27:45,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-22 04:27:45,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:45,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-22 04:27:45,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=3610, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 04:27:45,562 INFO L87 Difference]: Start difference. First operand 228 states and 239 transitions. Second operand 63 states. [2020-12-22 04:27:47,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:47,738 INFO L93 Difference]: Finished difference Result 257 states and 270 transitions. [2020-12-22 04:27:47,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-22 04:27:47,738 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 227 [2020-12-22 04:27:47,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:47,740 INFO L225 Difference]: With dead ends: 257 [2020-12-22 04:27:47,740 INFO L226 Difference]: Without dead ends: 253 [2020-12-22 04:27:47,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 176 SyntacticMatches, 10 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=296, Invalid=3610, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 04:27:47,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-12-22 04:27:47,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 241. [2020-12-22 04:27:47,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-12-22 04:27:47,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 253 transitions. [2020-12-22 04:27:47,771 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 253 transitions. Word has length 227 [2020-12-22 04:27:47,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:47,772 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 253 transitions. [2020-12-22 04:27:47,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-22 04:27:47,772 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 253 transitions. [2020-12-22 04:27:47,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-12-22 04:27:47,773 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:47,773 INFO L422 BasicCegarLoop]: trace histogram [180, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:47,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 04:27:47,974 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:47,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:47,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1385751688, now seen corresponding path program 24 times [2020-12-22 04:27:47,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:47,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327604651] [2020-12-22 04:27:47,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:48,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:48,716 INFO L134 CoverageAnalysis]: Checked inductivity of 19827 backedges. 0 proven. 18837 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2020-12-22 04:27:48,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327604651] [2020-12-22 04:27:48,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935959196] [2020-12-22 04:27:48,716 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:08,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 81 check-sat command(s) [2020-12-22 04:28:08,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:28:08,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 108 conjunts are in the unsatisfiable core [2020-12-22 04:28:08,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:11,098 INFO L134 CoverageAnalysis]: Checked inductivity of 19827 backedges. 133 proven. 18851 refuted. 0 times theorem prover too weak. 843 trivial. 0 not checked. [2020-12-22 04:28:11,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:11,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 42] total 43 [2020-12-22 04:28:11,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66824389] [2020-12-22 04:28:11,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 04:28:11,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:11,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 04:28:11,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:28:11,101 INFO L87 Difference]: Start difference. First operand 241 states and 253 transitions. Second operand 43 states. [2020-12-22 04:28:12,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:12,304 INFO L93 Difference]: Finished difference Result 270 states and 284 transitions. [2020-12-22 04:28:12,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 04:28:12,304 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 240 [2020-12-22 04:28:12,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:12,306 INFO L225 Difference]: With dead ends: 270 [2020-12-22 04:28:12,306 INFO L226 Difference]: Without dead ends: 266 [2020-12-22 04:28:12,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 216 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:28:12,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-12-22 04:28:12,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 254. [2020-12-22 04:28:12,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-12-22 04:28:12,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 267 transitions. [2020-12-22 04:28:12,342 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 267 transitions. Word has length 240 [2020-12-22 04:28:12,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:12,343 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 267 transitions. [2020-12-22 04:28:12,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 04:28:12,343 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 267 transitions. [2020-12-22 04:28:12,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-12-22 04:28:12,344 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:12,344 INFO L422 BasicCegarLoop]: trace histogram [190, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:12,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:12,545 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:12,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:12,546 INFO L82 PathProgramCache]: Analyzing trace with hash -17153053, now seen corresponding path program 25 times [2020-12-22 04:28:12,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:12,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048480797] [2020-12-22 04:28:12,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:12,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:13,297 INFO L134 CoverageAnalysis]: Checked inductivity of 22097 backedges. 0 proven. 21052 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2020-12-22 04:28:13,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048480797] [2020-12-22 04:28:13,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762131155] [2020-12-22 04:28:13,297 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:13,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:13,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 04:28:13,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 22097 backedges. 0 proven. 21052 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2020-12-22 04:28:13,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:13,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 04:28:13,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678982878] [2020-12-22 04:28:13,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 04:28:13,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:13,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 04:28:13,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:28:13,912 INFO L87 Difference]: Start difference. First operand 254 states and 267 transitions. Second operand 23 states. [2020-12-22 04:28:14,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:14,531 INFO L93 Difference]: Finished difference Result 283 states and 298 transitions. [2020-12-22 04:28:14,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:28:14,532 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 253 [2020-12-22 04:28:14,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:14,534 INFO L225 Difference]: With dead ends: 283 [2020-12-22 04:28:14,534 INFO L226 Difference]: Without dead ends: 279 [2020-12-22 04:28:14,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:28:14,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-12-22 04:28:14,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 267. [2020-12-22 04:28:14,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-12-22 04:28:14,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 281 transitions. [2020-12-22 04:28:14,567 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 281 transitions. Word has length 253 [2020-12-22 04:28:14,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:14,568 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 281 transitions. [2020-12-22 04:28:14,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 04:28:14,568 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 281 transitions. [2020-12-22 04:28:14,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-12-22 04:28:14,569 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:14,570 INFO L422 BasicCegarLoop]: trace histogram [200, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:14,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 04:28:14,775 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:14,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:14,776 INFO L82 PathProgramCache]: Analyzing trace with hash 595288408, now seen corresponding path program 26 times [2020-12-22 04:28:14,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:14,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126535805] [2020-12-22 04:28:14,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:14,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:15,518 INFO L134 CoverageAnalysis]: Checked inductivity of 24490 backedges. 0 proven. 23390 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2020-12-22 04:28:15,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126535805] [2020-12-22 04:28:15,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860953675] [2020-12-22 04:28:15,518 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:15,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:28:15,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:28:15,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 04:28:15,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:16,203 INFO L134 CoverageAnalysis]: Checked inductivity of 24490 backedges. 0 proven. 23390 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2020-12-22 04:28:16,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:16,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-22 04:28:16,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38569252] [2020-12-22 04:28:16,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 04:28:16,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:16,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 04:28:16,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:28:16,205 INFO L87 Difference]: Start difference. First operand 267 states and 281 transitions. Second operand 24 states. [2020-12-22 04:28:16,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:16,941 INFO L93 Difference]: Finished difference Result 296 states and 312 transitions. [2020-12-22 04:28:16,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 04:28:16,946 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 266 [2020-12-22 04:28:16,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:16,948 INFO L225 Difference]: With dead ends: 296 [2020-12-22 04:28:16,949 INFO L226 Difference]: Without dead ends: 292 [2020-12-22 04:28:16,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:28:16,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-12-22 04:28:17,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 280. [2020-12-22 04:28:17,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-12-22 04:28:17,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 295 transitions. [2020-12-22 04:28:17,008 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 295 transitions. Word has length 266 [2020-12-22 04:28:17,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:17,008 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 295 transitions. [2020-12-22 04:28:17,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 04:28:17,008 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 295 transitions. [2020-12-22 04:28:17,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-12-22 04:28:17,010 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:17,010 INFO L422 BasicCegarLoop]: trace histogram [210, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:17,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 04:28:17,223 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:17,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:17,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1926138371, now seen corresponding path program 27 times [2020-12-22 04:28:17,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:17,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886718953] [2020-12-22 04:28:17,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:17,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:18,110 INFO L134 CoverageAnalysis]: Checked inductivity of 27006 backedges. 0 proven. 25851 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2020-12-22 04:28:18,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886718953] [2020-12-22 04:28:18,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042798638] [2020-12-22 04:28:18,111 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:30,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 92 check-sat command(s) [2020-12-22 04:28:30,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:28:30,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-22 04:28:30,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:31,146 INFO L134 CoverageAnalysis]: Checked inductivity of 27006 backedges. 0 proven. 25851 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2020-12-22 04:28:31,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:31,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-22 04:28:31,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024387757] [2020-12-22 04:28:31,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 04:28:31,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:31,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 04:28:31,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:28:31,148 INFO L87 Difference]: Start difference. First operand 280 states and 295 transitions. Second operand 25 states. [2020-12-22 04:28:31,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:31,936 INFO L93 Difference]: Finished difference Result 309 states and 326 transitions. [2020-12-22 04:28:31,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 04:28:31,937 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 279 [2020-12-22 04:28:31,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:31,939 INFO L225 Difference]: With dead ends: 309 [2020-12-22 04:28:31,939 INFO L226 Difference]: Without dead ends: 305 [2020-12-22 04:28:31,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 267 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:28:31,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-12-22 04:28:31,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 293. [2020-12-22 04:28:31,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-12-22 04:28:31,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 309 transitions. [2020-12-22 04:28:31,993 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 309 transitions. Word has length 279 [2020-12-22 04:28:31,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:31,993 INFO L481 AbstractCegarLoop]: Abstraction has 293 states and 309 transitions. [2020-12-22 04:28:31,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 04:28:31,993 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 309 transitions. [2020-12-22 04:28:31,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2020-12-22 04:28:31,995 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:31,995 INFO L422 BasicCegarLoop]: trace histogram [220, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:32,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 04:28:32,207 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:32,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:32,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1761742648, now seen corresponding path program 28 times [2020-12-22 04:28:32,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:32,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353076882] [2020-12-22 04:28:32,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:33,189 INFO L134 CoverageAnalysis]: Checked inductivity of 29645 backedges. 0 proven. 28435 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2020-12-22 04:28:33,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353076882] [2020-12-22 04:28:33,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217120137] [2020-12-22 04:28:33,190 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:33,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:28:33,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:28:33,274 WARN L261 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-22 04:28:33,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:33,651 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:28:33,821 INFO L134 CoverageAnalysis]: Checked inductivity of 29645 backedges. 0 proven. 28435 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2020-12-22 04:28:33,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:33,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 27 [2020-12-22 04:28:33,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827822193] [2020-12-22 04:28:33,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 04:28:33,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:33,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 04:28:33,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:28:33,823 INFO L87 Difference]: Start difference. First operand 293 states and 309 transitions. Second operand 27 states. [2020-12-22 04:28:34,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:34,712 INFO L93 Difference]: Finished difference Result 322 states and 340 transitions. [2020-12-22 04:28:34,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 04:28:34,713 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 292 [2020-12-22 04:28:34,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:34,715 INFO L225 Difference]: With dead ends: 322 [2020-12-22 04:28:34,715 INFO L226 Difference]: Without dead ends: 318 [2020-12-22 04:28:34,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:28:34,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-12-22 04:28:34,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 306. [2020-12-22 04:28:34,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-12-22 04:28:34,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 323 transitions. [2020-12-22 04:28:34,776 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 323 transitions. Word has length 292 [2020-12-22 04:28:34,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:34,777 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 323 transitions. [2020-12-22 04:28:34,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 04:28:34,777 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 323 transitions. [2020-12-22 04:28:34,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-12-22 04:28:34,779 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:34,779 INFO L422 BasicCegarLoop]: trace histogram [230, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:34,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:34,993 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:34,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:34,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1515808803, now seen corresponding path program 29 times [2020-12-22 04:28:34,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:34,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564812365] [2020-12-22 04:28:34,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:35,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:35,936 INFO L134 CoverageAnalysis]: Checked inductivity of 32407 backedges. 0 proven. 31142 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2020-12-22 04:28:35,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564812365] [2020-12-22 04:28:35,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792168188] [2020-12-22 04:28:35,936 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:29:34,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 104 check-sat command(s) [2020-12-22 04:29:34,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:29:34,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 417 conjunts are in the unsatisfiable core [2020-12-22 04:29:34,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:29:48,941 INFO L134 CoverageAnalysis]: Checked inductivity of 32407 backedges. 126 proven. 31651 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-12-22 04:29:48,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:29:48,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 141] total 142 [2020-12-22 04:29:48,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137930791] [2020-12-22 04:29:48,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 142 states [2020-12-22 04:29:48,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:29:48,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2020-12-22 04:29:48,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=604, Invalid=19418, Unknown=0, NotChecked=0, Total=20022 [2020-12-22 04:29:48,948 INFO L87 Difference]: Start difference. First operand 306 states and 323 transitions. Second operand 142 states. [2020-12-22 04:29:56,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:29:56,154 INFO L93 Difference]: Finished difference Result 520 states and 555 transitions. [2020-12-22 04:29:56,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2020-12-22 04:29:56,154 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 305 [2020-12-22 04:29:56,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:29:56,156 INFO L225 Difference]: With dead ends: 520 [2020-12-22 04:29:56,156 INFO L226 Difference]: Without dead ends: 331 [2020-12-22 04:29:56,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 183 SyntacticMatches, 8 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7120 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=604, Invalid=19418, Unknown=0, NotChecked=0, Total=20022 [2020-12-22 04:29:56,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-12-22 04:29:56,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 319. [2020-12-22 04:29:56,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-12-22 04:29:56,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 331 transitions. [2020-12-22 04:29:56,214 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 331 transitions. Word has length 305 [2020-12-22 04:29:56,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:29:56,215 INFO L481 AbstractCegarLoop]: Abstraction has 319 states and 331 transitions. [2020-12-22 04:29:56,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 142 states. [2020-12-22 04:29:56,215 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 331 transitions. [2020-12-22 04:29:56,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-12-22 04:29:56,217 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:29:56,217 INFO L422 BasicCegarLoop]: trace histogram [240, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2020-12-22 04:29:56,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-22 04:29:56,429 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:29:56,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:29:56,429 INFO L82 PathProgramCache]: Analyzing trace with hash 575218968, now seen corresponding path program 30 times [2020-12-22 04:29:56,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:29:56,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420350656] [2020-12-22 04:29:56,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:29:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:29:57,464 INFO L134 CoverageAnalysis]: Checked inductivity of 35292 backedges. 0 proven. 33972 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2020-12-22 04:29:57,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420350656] [2020-12-22 04:29:57,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130801460] [2020-12-22 04:29:57,464 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true