/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_reverse_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:38:54,894 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:38:54,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:38:54,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:38:54,962 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:38:54,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:38:54,971 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:38:54,981 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:38:54,985 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:38:54,992 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:38:54,993 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:38:54,995 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-12-21 21:38:55,071 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:38:55,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:38:55,072 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:38:55,073 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:38:55,130 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:38:55,131 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:38:55,136 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:38:55,136 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:38:55,136 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:38:55,136 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:38:55,137 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:38:55,137 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:38:55,137 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:38:55,138 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:38:55,139 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:38:55,139 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:38:55,139 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:38:55,140 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:38:55,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:38:55,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:38:55,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:38:55,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:38:55,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:38:55,141 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:38:55,142 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:38:55,142 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:38:55,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:38:55,142 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:38:55,142 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:38:55,143 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:38:55,602 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:38:55,658 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:38:55,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:38:55,663 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:38:55,664 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:38:55,665 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_reverse_ground.i [2020-12-21 21:38:55,768 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d20eafffd/2495fbac68ce4fe8bc30f50b44963a0f/FLAGe1c4efb8f [2020-12-21 21:38:56,446 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:38:56,447 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_reverse_ground.i [2020-12-21 21:38:56,456 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d20eafffd/2495fbac68ce4fe8bc30f50b44963a0f/FLAGe1c4efb8f [2020-12-21 21:38:56,817 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d20eafffd/2495fbac68ce4fe8bc30f50b44963a0f [2020-12-21 21:38:56,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:38:56,825 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:38:56,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:38:56,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:38:56,835 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:38:56,837 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:38:56" (1/1) ... [2020-12-21 21:38:56,839 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32c61a85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:56, skipping insertion in model container [2020-12-21 21:38:56,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:38:56" (1/1) ... [2020-12-21 21:38:56,851 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:38:56,873 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:38:57,121 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_reverse_ground.i[816,829] [2020-12-21 21:38:57,146 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:38:57,158 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:38:57,176 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_reverse_ground.i[816,829] [2020-12-21 21:38:57,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:38:57,220 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:38:57,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:57 WrapperNode [2020-12-21 21:38:57,220 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:38:57,222 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:38:57,223 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:38:57,223 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:38:57,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:57" (1/1) ... [2020-12-21 21:38:57,243 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:57" (1/1) ... [2020-12-21 21:38:57,275 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:38:57,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:38:57,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:38:57,281 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:38:57,293 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:57" (1/1) ... [2020-12-21 21:38:57,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:57" (1/1) ... [2020-12-21 21:38:57,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:57" (1/1) ... [2020-12-21 21:38:57,307 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:57" (1/1) ... [2020-12-21 21:38:57,323 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:57" (1/1) ... [2020-12-21 21:38:57,335 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:57" (1/1) ... [2020-12-21 21:38:57,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:57" (1/1) ... [2020-12-21 21:38:57,339 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:38:57,340 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:38:57,341 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:38:57,341 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:38:57,342 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:38:57,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:38:57,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:38:57,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:38:57,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:38:57,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:38:57,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:38:57,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:38:57,764 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:38:57,764 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-21 21:38:57,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:38:57 BoogieIcfgContainer [2020-12-21 21:38:57,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:38:57,768 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:38:57,768 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:38:57,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:38:57,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:38:56" (1/3) ... [2020-12-21 21:38:57,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@280b5b63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:38:57, skipping insertion in model container [2020-12-21 21:38:57,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:57" (2/3) ... [2020-12-21 21:38:57,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@280b5b63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:38:57, skipping insertion in model container [2020-12-21 21:38:57,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:38:57" (3/3) ... [2020-12-21 21:38:57,776 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_reverse_ground.i [2020-12-21 21:38:57,799 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:38:57,809 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:38:57,862 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:38:57,937 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:38:57,937 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:38:57,938 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:38:57,938 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:38:57,938 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:38:57,938 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:38:57,938 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:38:57,938 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:38:57,957 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-12-21 21:38:57,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 21:38:57,964 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:57,965 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:57,966 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:57,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:57,975 INFO L82 PathProgramCache]: Analyzing trace with hash -2016449835, now seen corresponding path program 1 times [2020-12-21 21:38:57,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:57,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906317088] [2020-12-21 21:38:57,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:58,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:58,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:38:58,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906317088] [2020-12-21 21:38:58,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:38:58,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:38:58,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392751283] [2020-12-21 21:38:58,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:38:58,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:58,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:38:58,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:38:58,301 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2020-12-21 21:38:58,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:58,371 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2020-12-21 21:38:58,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:38:58,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-21 21:38:58,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:58,385 INFO L225 Difference]: With dead ends: 36 [2020-12-21 21:38:58,386 INFO L226 Difference]: Without dead ends: 18 [2020-12-21 21:38:58,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:38:58,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-21 21:38:58,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-12-21 21:38:58,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-21 21:38:58,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-12-21 21:38:58,435 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2020-12-21 21:38:58,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:58,436 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-12-21 21:38:58,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:38:58,436 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-12-21 21:38:58,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-21 21:38:58,438 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:58,438 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:58,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:38:58,440 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:58,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:58,443 INFO L82 PathProgramCache]: Analyzing trace with hash 2031054225, now seen corresponding path program 1 times [2020-12-21 21:38:58,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:58,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524468154] [2020-12-21 21:38:58,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:58,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:38:58,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524468154] [2020-12-21 21:38:58,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114701466] [2020-12-21 21:38:58,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:58,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:58,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:38:58,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:38:58,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:58,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:38:58,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088655566] [2020-12-21 21:38:58,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:38:58,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:58,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:38:58,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:38:58,722 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2020-12-21 21:38:58,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:58,783 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-12-21 21:38:58,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:38:58,784 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-21 21:38:58,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:58,785 INFO L225 Difference]: With dead ends: 33 [2020-12-21 21:38:58,785 INFO L226 Difference]: Without dead ends: 22 [2020-12-21 21:38:58,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:38:58,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-21 21:38:58,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-12-21 21:38:58,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-21 21:38:58,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-12-21 21:38:58,795 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2020-12-21 21:38:58,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:58,795 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-12-21 21:38:58,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:38:58,796 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-12-21 21:38:58,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 21:38:58,796 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:58,797 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:59,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 21:38:59,013 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:59,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:59,014 INFO L82 PathProgramCache]: Analyzing trace with hash -799235507, now seen corresponding path program 2 times [2020-12-21 21:38:59,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:59,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946295572] [2020-12-21 21:38:59,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:59,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:38:59,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946295572] [2020-12-21 21:38:59,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405677761] [2020-12-21 21:38:59,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:59,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:38:59,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:59,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:38:59,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:59,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:38:59,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:59,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-21 21:38:59,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074793842] [2020-12-21 21:38:59,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:38:59,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:59,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:38:59,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:38:59,256 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2020-12-21 21:38:59,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:59,349 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-12-21 21:38:59,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:38:59,351 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-12-21 21:38:59,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:59,352 INFO L225 Difference]: With dead ends: 39 [2020-12-21 21:38:59,352 INFO L226 Difference]: Without dead ends: 26 [2020-12-21 21:38:59,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:38:59,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-21 21:38:59,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-12-21 21:38:59,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-21 21:38:59,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-12-21 21:38:59,360 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2020-12-21 21:38:59,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:59,360 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-12-21 21:38:59,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:38:59,361 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-12-21 21:38:59,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 21:38:59,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:59,362 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:59,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:59,578 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:59,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:59,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1303246583, now seen corresponding path program 3 times [2020-12-21 21:38:59,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:59,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944946781] [2020-12-21 21:38:59,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:59,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-21 21:38:59,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944946781] [2020-12-21 21:38:59,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954431859] [2020-12-21 21:38:59,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:59,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:38:59,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:59,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-21 21:38:59,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:59,924 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-21 21:38:59,928 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 21:38:59,941 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:38:59,943 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-21 21:38:59,943 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-21 21:39:00,031 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2020-12-21 21:39:00,037 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 21:39:00,061 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:39:00,064 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 21:39:00,064 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2020-12-21 21:39:00,388 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:39:00,395 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:39:00,398 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 21:39:00,405 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-21 21:39:00,440 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-21 21:39:00,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:39:00,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2020-12-21 21:39:00,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936770949] [2020-12-21 21:39:00,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:39:00,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:00,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:39:00,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:39:00,443 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 8 states. [2020-12-21 21:39:00,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:00,798 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-12-21 21:39:00,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:39:00,801 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-12-21 21:39:00,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:00,802 INFO L225 Difference]: With dead ends: 31 [2020-12-21 21:39:00,803 INFO L226 Difference]: Without dead ends: 29 [2020-12-21 21:39:00,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:39:00,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-21 21:39:00,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-12-21 21:39:00,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-21 21:39:00,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-12-21 21:39:00,826 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2020-12-21 21:39:00,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:00,826 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-12-21 21:39:00,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:39:00,827 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-12-21 21:39:00,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-21 21:39:00,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:00,829 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:01,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:01,043 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:01,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:01,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1047897217, now seen corresponding path program 1 times [2020-12-21 21:39:01,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:01,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034833082] [2020-12-21 21:39:01,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:01,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:01,118 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-21 21:39:01,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034833082] [2020-12-21 21:39:01,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777417578] [2020-12-21 21:39:01,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:01,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:01,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:39:01,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:01,244 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-21 21:39:01,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:01,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 21:39:01,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132020436] [2020-12-21 21:39:01,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:39:01,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:01,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:39:01,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:39:01,247 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2020-12-21 21:39:01,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:01,317 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-12-21 21:39:01,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:39:01,318 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-12-21 21:39:01,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:01,319 INFO L225 Difference]: With dead ends: 49 [2020-12-21 21:39:01,319 INFO L226 Difference]: Without dead ends: 32 [2020-12-21 21:39:01,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:39:01,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-21 21:39:01,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-12-21 21:39:01,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-21 21:39:01,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-12-21 21:39:01,327 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2020-12-21 21:39:01,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:01,327 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-12-21 21:39:01,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:39:01,328 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-12-21 21:39:01,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 21:39:01,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:01,329 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:01,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:01,543 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:01,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:01,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1217410619, now seen corresponding path program 2 times [2020-12-21 21:39:01,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:01,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355658732] [2020-12-21 21:39:01,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:01,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:01,695 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-21 21:39:01,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355658732] [2020-12-21 21:39:01,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471378917] [2020-12-21 21:39:01,696 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:01,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:39:01,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:01,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:39:01,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:01,855 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-21 21:39:01,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:01,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:39:01,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878342961] [2020-12-21 21:39:01,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:39:01,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:01,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:39:01,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:39:01,860 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-12-21 21:39:01,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:01,944 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2020-12-21 21:39:01,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:39:01,944 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-12-21 21:39:01,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:01,947 INFO L225 Difference]: With dead ends: 55 [2020-12-21 21:39:01,947 INFO L226 Difference]: Without dead ends: 36 [2020-12-21 21:39:01,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:39:01,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-21 21:39:01,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-12-21 21:39:01,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-21 21:39:01,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-12-21 21:39:01,964 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2020-12-21 21:39:01,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:01,965 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-12-21 21:39:01,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:39:01,965 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-12-21 21:39:01,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-21 21:39:01,967 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:01,967 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:02,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 21:39:02,183 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:02,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:02,185 INFO L82 PathProgramCache]: Analyzing trace with hash -2121579785, now seen corresponding path program 3 times [2020-12-21 21:39:02,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:02,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033354295] [2020-12-21 21:39:02,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:02,258 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-21 21:39:02,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033354295] [2020-12-21 21:39:02,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865986940] [2020-12-21 21:39:02,259 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:02,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-21 21:39:02,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:02,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-21 21:39:02,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:02,388 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-21 21:39:02,390 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 21:39:02,392 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:39:02,393 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-21 21:39:02,393 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:8, output treesize:4 [2020-12-21 21:39:02,427 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2020-12-21 21:39:02,429 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 21:39:02,435 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:39:02,436 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 21:39:02,436 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2020-12-21 21:39:02,496 INFO L348 Elim1Store]: treesize reduction 58, result has 17.1 percent of original size [2020-12-21 21:39:02,497 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 51 [2020-12-21 21:39:02,499 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 21:39:02,510 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:39:02,511 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 21:39:02,515 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:49 [2020-12-21 21:39:02,871 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 21:39:02,881 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 21:39:02,885 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-21 21:39:02,896 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-21 21:39:02,927 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-12-21 21:39:02,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:02,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2020-12-21 21:39:02,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199920068] [2020-12-21 21:39:02,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:39:02,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:02,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:39:02,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:39:02,932 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 18 states. [2020-12-21 21:39:04,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:04,084 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2020-12-21 21:39:04,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-21 21:39:04,084 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2020-12-21 21:39:04,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:04,085 INFO L225 Difference]: With dead ends: 68 [2020-12-21 21:39:04,085 INFO L226 Difference]: Without dead ends: 47 [2020-12-21 21:39:04,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=347, Invalid=1293, Unknown=0, NotChecked=0, Total=1640 [2020-12-21 21:39:04,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-21 21:39:04,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2020-12-21 21:39:04,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-21 21:39:04,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-12-21 21:39:04,095 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 33 [2020-12-21 21:39:04,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:04,096 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-12-21 21:39:04,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:39:04,096 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-12-21 21:39:04,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 21:39:04,097 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:04,097 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:04,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:04,311 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:04,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:04,313 INFO L82 PathProgramCache]: Analyzing trace with hash 967733033, now seen corresponding path program 4 times [2020-12-21 21:39:04,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:04,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122565549] [2020-12-21 21:39:04,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:04,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:04,407 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-12-21 21:39:04,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122565549] [2020-12-21 21:39:04,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287502672] [2020-12-21 21:39:04,408 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:04,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:39:04,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:04,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:39:04,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:04,555 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-12-21 21:39:04,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:04,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 21:39:04,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519831003] [2020-12-21 21:39:04,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:39:04,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:04,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:39:04,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:39:04,561 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 10 states. [2020-12-21 21:39:04,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:04,661 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2020-12-21 21:39:04,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:39:04,662 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-12-21 21:39:04,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:04,663 INFO L225 Difference]: With dead ends: 75 [2020-12-21 21:39:04,663 INFO L226 Difference]: Without dead ends: 48 [2020-12-21 21:39:04,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:39:04,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-21 21:39:04,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-12-21 21:39:04,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-21 21:39:04,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-12-21 21:39:04,673 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 41 [2020-12-21 21:39:04,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:04,673 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-12-21 21:39:04,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:39:04,674 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-12-21 21:39:04,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-21 21:39:04,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:04,675 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:04,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:04,890 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:04,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:04,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1132060187, now seen corresponding path program 5 times [2020-12-21 21:39:04,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:04,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779102342] [2020-12-21 21:39:04,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:04,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-21 21:39:04,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779102342] [2020-12-21 21:39:04,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32656182] [2020-12-21 21:39:04,990 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:05,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-21 21:39:05,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:05,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:39:05,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:05,463 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-21 21:39:05,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:05,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:39:05,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283473048] [2020-12-21 21:39:05,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:39:05,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:05,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:39:05,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:39:05,466 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 11 states. [2020-12-21 21:39:05,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:05,549 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2020-12-21 21:39:05,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:39:05,550 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-12-21 21:39:05,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:05,551 INFO L225 Difference]: With dead ends: 81 [2020-12-21 21:39:05,551 INFO L226 Difference]: Without dead ends: 52 [2020-12-21 21:39:05,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:39:05,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-21 21:39:05,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-12-21 21:39:05,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-21 21:39:05,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-12-21 21:39:05,561 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 45 [2020-12-21 21:39:05,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:05,561 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-12-21 21:39:05,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:39:05,561 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-12-21 21:39:05,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-21 21:39:05,562 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:05,562 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:05,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-21 21:39:05,778 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:05,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:05,779 INFO L82 PathProgramCache]: Analyzing trace with hash 775620257, now seen corresponding path program 6 times [2020-12-21 21:39:05,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:05,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146677048] [2020-12-21 21:39:05,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:05,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-21 21:39:05,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146677048] [2020-12-21 21:39:05,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828399255] [2020-12-21 21:39:05,890 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:06,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-21 21:39:06,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:06,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-21 21:39:06,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:06,427 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-21 21:39:06,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:06,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:39:06,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168938769] [2020-12-21 21:39:06,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:39:06,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:06,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:39:06,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:39:06,430 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 12 states. [2020-12-21 21:39:06,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:06,515 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2020-12-21 21:39:06,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:39:06,516 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-12-21 21:39:06,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:06,517 INFO L225 Difference]: With dead ends: 87 [2020-12-21 21:39:06,517 INFO L226 Difference]: Without dead ends: 56 [2020-12-21 21:39:06,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:39:06,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-21 21:39:06,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2020-12-21 21:39:06,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-21 21:39:06,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-12-21 21:39:06,526 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 49 [2020-12-21 21:39:06,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:06,527 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-12-21 21:39:06,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:39:06,527 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-12-21 21:39:06,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-21 21:39:06,528 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:06,528 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:06,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:06,743 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:06,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:06,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1634213213, now seen corresponding path program 7 times [2020-12-21 21:39:06,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:06,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656710681] [2020-12-21 21:39:06,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:06,930 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2020-12-21 21:39:06,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656710681] [2020-12-21 21:39:06,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525486489] [2020-12-21 21:39:06,931 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:07,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:39:07,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:07,089 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2020-12-21 21:39:07,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:07,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-21 21:39:07,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812339986] [2020-12-21 21:39:07,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:39:07,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:07,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:39:07,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:39:07,091 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 13 states. [2020-12-21 21:39:07,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:07,193 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2020-12-21 21:39:07,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:39:07,193 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-12-21 21:39:07,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:07,194 INFO L225 Difference]: With dead ends: 93 [2020-12-21 21:39:07,194 INFO L226 Difference]: Without dead ends: 60 [2020-12-21 21:39:07,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:39:07,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-21 21:39:07,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-12-21 21:39:07,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-21 21:39:07,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-12-21 21:39:07,205 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 53 [2020-12-21 21:39:07,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:07,205 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-12-21 21:39:07,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:39:07,205 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-12-21 21:39:07,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-21 21:39:07,206 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:07,206 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:07,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:07,420 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:07,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:07,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1378379289, now seen corresponding path program 8 times [2020-12-21 21:39:07,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:07,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947075259] [2020-12-21 21:39:07,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:07,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:07,566 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-12-21 21:39:07,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947075259] [2020-12-21 21:39:07,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074229897] [2020-12-21 21:39:07,566 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:07,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:39:07,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:07,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:39:07,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:07,718 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-12-21 21:39:07,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:07,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 21:39:07,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168336680] [2020-12-21 21:39:07,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:39:07,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:07,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:39:07,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:39:07,721 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 14 states. [2020-12-21 21:39:07,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:07,832 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2020-12-21 21:39:07,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:39:07,833 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2020-12-21 21:39:07,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:07,834 INFO L225 Difference]: With dead ends: 99 [2020-12-21 21:39:07,834 INFO L226 Difference]: Without dead ends: 64 [2020-12-21 21:39:07,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:39:07,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-21 21:39:07,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2020-12-21 21:39:07,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-21 21:39:07,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-12-21 21:39:07,846 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 57 [2020-12-21 21:39:07,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:07,846 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-12-21 21:39:07,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:39:07,846 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-12-21 21:39:07,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-21 21:39:07,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:07,848 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:08,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-21 21:39:08,063 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:08,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:08,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1508450091, now seen corresponding path program 9 times [2020-12-21 21:39:08,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:08,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383464068] [2020-12-21 21:39:08,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:08,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2020-12-21 21:39:08,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383464068] [2020-12-21 21:39:08,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213075907] [2020-12-21 21:39:08,243 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:08,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-21 21:39:08,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:08,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-21 21:39:08,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:08,392 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-21 21:39:08,396 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 21:39:08,402 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:39:08,403 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-21 21:39:08,403 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-21 21:39:08,472 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2020-12-21 21:39:08,473 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 21:39:08,479 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:39:08,480 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 21:39:08,480 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2020-12-21 21:39:08,536 INFO L348 Elim1Store]: treesize reduction 58, result has 17.1 percent of original size [2020-12-21 21:39:08,536 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 51 [2020-12-21 21:39:08,538 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 21:39:08,545 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:39:08,546 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 21:39:08,546 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:46 [2020-12-21 21:39:08,671 INFO L348 Elim1Store]: treesize reduction 150, result has 14.3 percent of original size [2020-12-21 21:39:08,672 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 78 [2020-12-21 21:39:08,675 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 21:39:08,686 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:39:08,689 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 21:39:08,690 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:70 [2020-12-21 21:39:09,188 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-21 21:39:09,195 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-21 21:39:09,198 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-21 21:39:09,205 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-21 21:39:09,269 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 55 proven. 50 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-21 21:39:09,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:09,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2020-12-21 21:39:09,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805136712] [2020-12-21 21:39:09,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-21 21:39:09,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:09,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-21 21:39:09,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:39:09,272 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 29 states. [2020-12-21 21:39:11,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:11,849 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2020-12-21 21:39:11,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-21 21:39:11,849 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 61 [2020-12-21 21:39:11,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:11,850 INFO L225 Difference]: With dead ends: 112 [2020-12-21 21:39:11,850 INFO L226 Difference]: Without dead ends: 75 [2020-12-21 21:39:11,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=999, Invalid=3693, Unknown=0, NotChecked=0, Total=4692 [2020-12-21 21:39:11,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-21 21:39:11,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2020-12-21 21:39:11,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-21 21:39:11,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-12-21 21:39:11,865 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 61 [2020-12-21 21:39:11,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:11,865 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-12-21 21:39:11,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-21 21:39:11,865 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-12-21 21:39:11,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-21 21:39:11,866 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:11,866 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:12,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 21:39:12,080 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:12,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:12,081 INFO L82 PathProgramCache]: Analyzing trace with hash 690052103, now seen corresponding path program 10 times [2020-12-21 21:39:12,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:12,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451305212] [2020-12-21 21:39:12,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:12,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:12,289 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-21 21:39:12,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451305212] [2020-12-21 21:39:12,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504540541] [2020-12-21 21:39:12,289 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:12,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:39:12,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:12,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 21:39:12,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:12,436 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-21 21:39:12,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:12,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-21 21:39:12,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468479268] [2020-12-21 21:39:12,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 21:39:12,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:12,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 21:39:12,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:39:12,438 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 16 states. [2020-12-21 21:39:12,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:12,560 INFO L93 Difference]: Finished difference Result 119 states and 124 transitions. [2020-12-21 21:39:12,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 21:39:12,561 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2020-12-21 21:39:12,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:12,562 INFO L225 Difference]: With dead ends: 119 [2020-12-21 21:39:12,562 INFO L226 Difference]: Without dead ends: 76 [2020-12-21 21:39:12,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:39:12,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-21 21:39:12,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-12-21 21:39:12,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-21 21:39:12,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-12-21 21:39:12,573 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 69 [2020-12-21 21:39:12,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:12,574 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-12-21 21:39:12,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 21:39:12,574 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-12-21 21:39:12,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-21 21:39:12,575 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:12,575 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:12,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 21:39:12,786 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:12,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:12,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1753776957, now seen corresponding path program 11 times [2020-12-21 21:39:12,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:12,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009953147] [2020-12-21 21:39:12,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:12,974 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-21 21:39:12,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009953147] [2020-12-21 21:39:12,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424601615] [2020-12-21 21:39:12,974 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 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 [2020-12-21 21:39:20,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-12-21 21:39:20,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:20,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:39:20,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:20,963 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-21 21:39:20,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:20,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-21 21:39:20,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12197804] [2020-12-21 21:39:20,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 21:39:20,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:20,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 21:39:20,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:39:20,966 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 17 states. [2020-12-21 21:39:21,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:21,091 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2020-12-21 21:39:21,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 21:39:21,092 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-12-21 21:39:21,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:21,093 INFO L225 Difference]: With dead ends: 125 [2020-12-21 21:39:21,093 INFO L226 Difference]: Without dead ends: 80 [2020-12-21 21:39:21,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:39:21,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-21 21:39:21,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2020-12-21 21:39:21,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-21 21:39:21,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-12-21 21:39:21,104 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 73 [2020-12-21 21:39:21,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:21,105 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-12-21 21:39:21,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 21:39:21,105 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-12-21 21:39:21,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-21 21:39:21,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:21,106 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:21,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:21,319 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:21,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:21,320 INFO L82 PathProgramCache]: Analyzing trace with hash 2078527359, now seen corresponding path program 12 times [2020-12-21 21:39:21,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:21,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808808175] [2020-12-21 21:39:21,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:21,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:21,556 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2020-12-21 21:39:21,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808808175] [2020-12-21 21:39:21,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12639129] [2020-12-21 21:39:21,557 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 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 [2020-12-21 21:39:24,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-12-21 21:39:24,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:24,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:39:24,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:24,154 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2020-12-21 21:39:24,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:24,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-21 21:39:24,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459653262] [2020-12-21 21:39:24,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:39:24,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:24,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:39:24,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:39:24,157 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 18 states. [2020-12-21 21:39:24,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:24,310 INFO L93 Difference]: Finished difference Result 131 states and 136 transitions. [2020-12-21 21:39:24,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 21:39:24,311 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 77 [2020-12-21 21:39:24,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:24,311 INFO L225 Difference]: With dead ends: 131 [2020-12-21 21:39:24,311 INFO L226 Difference]: Without dead ends: 84 [2020-12-21 21:39:24,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:39:24,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-21 21:39:24,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2020-12-21 21:39:24,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-21 21:39:24,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-12-21 21:39:24,323 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 77 [2020-12-21 21:39:24,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:24,323 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-12-21 21:39:24,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:39:24,323 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-12-21 21:39:24,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-21 21:39:24,324 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:24,324 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:24,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 21:39:24,540 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:24,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:24,541 INFO L82 PathProgramCache]: Analyzing trace with hash -595504069, now seen corresponding path program 13 times [2020-12-21 21:39:24,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:24,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60280352] [2020-12-21 21:39:24,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:24,785 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-12-21 21:39:24,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60280352] [2020-12-21 21:39:24,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778852130] [2020-12-21 21:39:24,786 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 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 [2020-12-21 21:39:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:24,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 21:39:24,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:24,972 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-12-21 21:39:24,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:24,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-21 21:39:24,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198377407] [2020-12-21 21:39:24,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-21 21:39:24,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:24,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-21 21:39:24,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:39:24,974 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 19 states. [2020-12-21 21:39:25,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:25,144 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2020-12-21 21:39:25,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 21:39:25,145 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2020-12-21 21:39:25,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:25,146 INFO L225 Difference]: With dead ends: 137 [2020-12-21 21:39:25,146 INFO L226 Difference]: Without dead ends: 88 [2020-12-21 21:39:25,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:39:25,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-21 21:39:25,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-12-21 21:39:25,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-21 21:39:25,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-12-21 21:39:25,158 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 81 [2020-12-21 21:39:25,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:25,158 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-12-21 21:39:25,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-21 21:39:25,159 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-12-21 21:39:25,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-21 21:39:25,159 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:25,160 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:25,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 21:39:25,374 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:25,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:25,375 INFO L82 PathProgramCache]: Analyzing trace with hash 686492407, now seen corresponding path program 14 times [2020-12-21 21:39:25,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:25,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678283827] [2020-12-21 21:39:25,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:25,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:25,694 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2020-12-21 21:39:25,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678283827] [2020-12-21 21:39:25,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231873061] [2020-12-21 21:39:25,694 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 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 [2020-12-21 21:39:25,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:39:25,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:25,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 21:39:25,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:25,876 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2020-12-21 21:39:25,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:25,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-21 21:39:25,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899267179] [2020-12-21 21:39:25,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 21:39:25,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:25,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 21:39:25,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:39:25,877 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 20 states. [2020-12-21 21:39:26,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:26,048 INFO L93 Difference]: Finished difference Result 143 states and 148 transitions. [2020-12-21 21:39:26,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 21:39:26,048 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 85 [2020-12-21 21:39:26,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:26,049 INFO L225 Difference]: With dead ends: 143 [2020-12-21 21:39:26,049 INFO L226 Difference]: Without dead ends: 92 [2020-12-21 21:39:26,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:39:26,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-21 21:39:26,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2020-12-21 21:39:26,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-21 21:39:26,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-12-21 21:39:26,060 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 85 [2020-12-21 21:39:26,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:26,060 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-12-21 21:39:26,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 21:39:26,060 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-12-21 21:39:26,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-21 21:39:26,061 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:26,061 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:26,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 21:39:26,275 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:26,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:26,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1170476109, now seen corresponding path program 15 times [2020-12-21 21:39:26,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:26,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947943705] [2020-12-21 21:39:26,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:26,544 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2020-12-21 21:39:26,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947943705] [2020-12-21 21:39:26,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202923459] [2020-12-21 21:39:26,545 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 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 [2020-12-21 21:39:26,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-21 21:39:26,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:26,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-21 21:39:26,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:26,955 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-21 21:39:26,957 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 21:39:26,965 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:39:26,987 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-21 21:39:26,987 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2020-12-21 21:39:27,210 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2020-12-21 21:39:27,211 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 21:39:27,222 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:39:27,223 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 21:39:27,223 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2020-12-21 21:39:27,335 INFO L348 Elim1Store]: treesize reduction 58, result has 17.1 percent of original size [2020-12-21 21:39:27,336 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 51 [2020-12-21 21:39:27,338 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 21:39:27,350 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:39:27,353 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 21:39:27,353 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:52 [2020-12-21 21:39:27,490 INFO L348 Elim1Store]: treesize reduction 150, result has 14.3 percent of original size [2020-12-21 21:39:27,491 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 78 [2020-12-21 21:39:27,494 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 21:39:27,508 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:39:27,509 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 21:39:27,510 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:77, output treesize:73 [2020-12-21 21:39:27,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 21:39:27,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 21:39:27,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 21:39:27,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 21:39:27,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 21:39:27,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 21:39:27,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 21:39:27,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 21:39:27,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 21:39:27,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 21:39:27,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 21:39:27,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 21:39:27,655 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 13 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 105 [2020-12-21 21:39:27,658 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 21:39:27,679 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:39:27,680 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 21:39:27,680 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:101, output treesize:97 [2020-12-21 21:39:28,512 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-21 21:39:28,515 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-21 21:39:28,517 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-21 21:39:28,520 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-21 21:39:28,627 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 144 proven. 114 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-12-21 21:39:28,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:28,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 41 [2020-12-21 21:39:28,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450698126] [2020-12-21 21:39:28,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-21 21:39:28,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:28,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-21 21:39:28,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=1306, Unknown=0, NotChecked=0, Total=1640 [2020-12-21 21:39:28,630 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 41 states. [2020-12-21 21:39:33,656 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2020-12-21 21:39:34,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:34,531 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2020-12-21 21:39:34,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-21 21:39:34,531 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 89 [2020-12-21 21:39:34,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:34,532 INFO L225 Difference]: With dead ends: 158 [2020-12-21 21:39:34,533 INFO L226 Difference]: Without dead ends: 105 [2020-12-21 21:39:34,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2870 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=2177, Invalid=7723, Unknown=0, NotChecked=0, Total=9900 [2020-12-21 21:39:34,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-21 21:39:34,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2020-12-21 21:39:34,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-21 21:39:34,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2020-12-21 21:39:34,562 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 89 [2020-12-21 21:39:34,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:34,563 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2020-12-21 21:39:34,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-21 21:39:34,563 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2020-12-21 21:39:34,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-21 21:39:34,564 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:34,564 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:34,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:34,779 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:34,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:34,780 INFO L82 PathProgramCache]: Analyzing trace with hash -711078751, now seen corresponding path program 16 times [2020-12-21 21:39:34,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:34,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744754350] [2020-12-21 21:39:34,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:34,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:35,104 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2020-12-21 21:39:35,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744754350] [2020-12-21 21:39:35,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775910719] [2020-12-21 21:39:35,105 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 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 [2020-12-21 21:39:35,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:39:35,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:35,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 21:39:35,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:35,386 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2020-12-21 21:39:35,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:35,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-21 21:39:35,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749281872] [2020-12-21 21:39:35,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-21 21:39:35,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:35,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-21 21:39:35,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:39:35,390 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 23 states. [2020-12-21 21:39:35,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:35,602 INFO L93 Difference]: Finished difference Result 169 states and 174 transitions. [2020-12-21 21:39:35,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 21:39:35,603 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 101 [2020-12-21 21:39:35,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:35,604 INFO L225 Difference]: With dead ends: 169 [2020-12-21 21:39:35,604 INFO L226 Difference]: Without dead ends: 108 [2020-12-21 21:39:35,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:39:35,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-21 21:39:35,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2020-12-21 21:39:35,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-21 21:39:35,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-12-21 21:39:35,621 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 101 [2020-12-21 21:39:35,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:35,622 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-12-21 21:39:35,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-21 21:39:35,622 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-12-21 21:39:35,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-21 21:39:35,623 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:35,623 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:35,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:35,836 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:35,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:35,837 INFO L82 PathProgramCache]: Analyzing trace with hash -785347235, now seen corresponding path program 17 times [2020-12-21 21:39:35,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:35,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783234861] [2020-12-21 21:39:35,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:35,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:36,209 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2020-12-21 21:39:36,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783234861] [2020-12-21 21:39:36,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163780779] [2020-12-21 21:39:36,209 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 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 [2020-12-21 21:43:25,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-12-21 21:43:25,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:43:25,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-21 21:43:25,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:43:26,168 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2020-12-21 21:43:26,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:43:26,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-21 21:43:26,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428467304] [2020-12-21 21:43:26,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-21 21:43:26,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:43:26,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-21 21:43:26,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:43:26,171 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 24 states. [2020-12-21 21:43:26,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:43:26,476 INFO L93 Difference]: Finished difference Result 175 states and 180 transitions. [2020-12-21 21:43:26,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-21 21:43:26,477 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 105 [2020-12-21 21:43:26,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:43:26,479 INFO L225 Difference]: With dead ends: 175 [2020-12-21 21:43:26,479 INFO L226 Difference]: Without dead ends: 112 [2020-12-21 21:43:26,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:43:26,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-21 21:43:26,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-12-21 21:43:26,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-21 21:43:26,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2020-12-21 21:43:26,505 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 105 [2020-12-21 21:43:26,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:43:26,505 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2020-12-21 21:43:26,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-21 21:43:26,506 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2020-12-21 21:43:26,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-21 21:43:26,508 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:43:26,508 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:43:26,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-21 21:43:26,724 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:43:26,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:43:26,725 INFO L82 PathProgramCache]: Analyzing trace with hash -198344679, now seen corresponding path program 18 times [2020-12-21 21:43:26,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:43:26,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878128829] [2020-12-21 21:43:26,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:43:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:43:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2020-12-21 21:43:27,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878128829] [2020-12-21 21:43:27,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003224328] [2020-12-21 21:43:27,205 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 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