/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/loops/insertion_sort-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:17:43,509 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:17:43,512 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:17:43,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:17:43,546 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:17:43,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:17:43,550 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:17:43,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:17:43,565 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:17:43,567 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:17:43,569 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:17:43,571 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-12-22 04:17:43,632 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:17:43,632 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:17:43,633 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:17:43,637 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:17:43,666 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:17:43,666 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:17:43,667 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:17:43,668 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:17:43,668 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:17:43,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:17:43,668 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:17:43,668 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:17:43,669 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:17:43,669 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:17:43,669 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:17:43,669 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:17:43,669 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:17:43,670 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:17:43,670 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:17:43,670 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:17:43,670 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:17:43,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:17:43,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:17:43,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:17:43,671 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:17:43,671 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:17:43,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:17:43,672 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:17:43,672 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:17:43,672 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:17:44,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:17:44,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:17:44,078 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:17:44,080 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:17:44,080 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:17:44,081 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/insertion_sort-1.c [2020-12-22 04:17:44,163 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39e0dffbf/b3c317d96ec84a53b6fb3e1b4c914447/FLAG3ba293daa [2020-12-22 04:17:44,893 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:17:44,894 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/insertion_sort-1.c [2020-12-22 04:17:44,901 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39e0dffbf/b3c317d96ec84a53b6fb3e1b4c914447/FLAG3ba293daa [2020-12-22 04:17:45,244 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39e0dffbf/b3c317d96ec84a53b6fb3e1b4c914447 [2020-12-22 04:17:45,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:17:45,249 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:17:45,251 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:17:45,251 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:17:45,257 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:17:45,258 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:17:45" (1/1) ... [2020-12-22 04:17:45,259 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c5a59eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:45, skipping insertion in model container [2020-12-22 04:17:45,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:17:45" (1/1) ... [2020-12-22 04:17:45,270 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:17:45,288 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:17:45,477 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/loops/insertion_sort-1.c[328,341] [2020-12-22 04:17:45,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:17:45,509 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:17:45,524 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/loops/insertion_sort-1.c[328,341] [2020-12-22 04:17:45,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:17:45,557 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:17:45,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:45 WrapperNode [2020-12-22 04:17:45,557 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:17:45,559 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:17:45,559 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:17:45,559 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:17:45,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:45" (1/1) ... [2020-12-22 04:17:45,578 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:45" (1/1) ... [2020-12-22 04:17:45,602 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:17:45,603 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:17:45,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:17:45,604 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:17:45,613 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:45" (1/1) ... [2020-12-22 04:17:45,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:45" (1/1) ... [2020-12-22 04:17:45,616 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:45" (1/1) ... [2020-12-22 04:17:45,617 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:45" (1/1) ... [2020-12-22 04:17:45,623 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:45" (1/1) ... [2020-12-22 04:17:45,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:45" (1/1) ... [2020-12-22 04:17:45,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:45" (1/1) ... [2020-12-22 04:17:45,632 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:17:45,633 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:17:45,634 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:17:45,634 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:17:45,635 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:17:45,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:17:45,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:17:45,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 04:17:45,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:17:45,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:17:45,750 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 04:17:45,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 04:17:46,125 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:17:46,125 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-22 04:17:46,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:17:46 BoogieIcfgContainer [2020-12-22 04:17:46,127 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:17:46,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:17:46,133 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:17:46,142 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:17:46,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:17:45" (1/3) ... [2020-12-22 04:17:46,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3434c3ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:17:46, skipping insertion in model container [2020-12-22 04:17:46,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:45" (2/3) ... [2020-12-22 04:17:46,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3434c3ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:17:46, skipping insertion in model container [2020-12-22 04:17:46,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:17:46" (3/3) ... [2020-12-22 04:17:46,151 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-1.c [2020-12-22 04:17:46,159 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:17:46,165 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:17:46,189 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:17:46,252 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:17:46,252 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:17:46,253 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:17:46,253 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:17:46,253 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:17:46,253 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:17:46,253 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:17:46,254 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:17:46,274 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-12-22 04:17:46,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 04:17:46,281 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:46,282 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:46,282 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:46,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:46,291 INFO L82 PathProgramCache]: Analyzing trace with hash -2015618667, now seen corresponding path program 1 times [2020-12-22 04:17:46,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:46,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442194826] [2020-12-22 04:17:46,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:46,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:46,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:17:46,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442194826] [2020-12-22 04:17:46,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:17:46,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 04:17:46,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747667023] [2020-12-22 04:17:46,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:17:46,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:46,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:17:46,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:17:46,764 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-12-22 04:17:46,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:46,865 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2020-12-22 04:17:46,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:17:46,867 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-22 04:17:46,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:46,876 INFO L225 Difference]: With dead ends: 54 [2020-12-22 04:17:46,877 INFO L226 Difference]: Without dead ends: 22 [2020-12-22 04:17:46,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:17:46,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-22 04:17:46,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-12-22 04:17:46,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 04:17:46,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2020-12-22 04:17:46,914 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 9 [2020-12-22 04:17:46,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:46,914 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2020-12-22 04:17:46,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:17:46,915 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2020-12-22 04:17:46,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 04:17:46,915 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:46,915 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:46,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:17:46,916 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:46,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:46,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1565476563, now seen corresponding path program 1 times [2020-12-22 04:17:46,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:46,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950150999] [2020-12-22 04:17:46,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:46,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:47,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:17:47,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950150999] [2020-12-22 04:17:47,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525864721] [2020-12-22 04:17:47,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:47,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:47,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 04:17:47,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:17:47,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:17:47,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:17:47,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 04:17:47,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55514837] [2020-12-22 04:17:47,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:17:47,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:47,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:17:47,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:17:47,491 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 7 states. [2020-12-22 04:17:47,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:47,710 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2020-12-22 04:17:47,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:17:47,715 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-12-22 04:17:47,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:47,716 INFO L225 Difference]: With dead ends: 51 [2020-12-22 04:17:47,719 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 04:17:47,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:17:47,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 04:17:47,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2020-12-22 04:17:47,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 04:17:47,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-12-22 04:17:47,736 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 11 [2020-12-22 04:17:47,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:47,737 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-12-22 04:17:47,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:17:47,738 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-12-22 04:17:47,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 04:17:47,739 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:47,739 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:47,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 04:17:47,955 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:47,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:47,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1379565948, now seen corresponding path program 1 times [2020-12-22 04:17:47,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:47,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648399602] [2020-12-22 04:17:47,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:48,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:17:48,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648399602] [2020-12-22 04:17:48,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359176742] [2020-12-22 04:17:48,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:48,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:48,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 04:17:48,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:17:48,890 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:49,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:17:49,023 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 28 treesize of output 27 [2020-12-22 04:17:49,031 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:17:49,043 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:17:49,048 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 04:17:49,048 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:30 [2020-12-22 04:17:49,112 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:49,116 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:49,123 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:49,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:17:49,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:17:49,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 18 [2020-12-22 04:17:49,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605722575] [2020-12-22 04:17:49,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 04:17:49,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:49,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 04:17:49,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:17:49,152 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 18 states. [2020-12-22 04:17:49,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:49,916 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2020-12-22 04:17:49,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 04:17:49,917 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2020-12-22 04:17:49,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:49,921 INFO L225 Difference]: With dead ends: 77 [2020-12-22 04:17:49,921 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 04:17:49,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=228, Invalid=828, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:17:49,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 04:17:49,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 38. [2020-12-22 04:17:49,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 04:17:49,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2020-12-22 04:17:49,945 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 19 [2020-12-22 04:17:49,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:49,946 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2020-12-22 04:17:49,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 04:17:49,947 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2020-12-22 04:17:49,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 04:17:49,947 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:49,948 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:50,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:50,162 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:50,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:50,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1125897754, now seen corresponding path program 1 times [2020-12-22 04:17:50,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:50,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088700774] [2020-12-22 04:17:50,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:50,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:50,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:17:50,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088700774] [2020-12-22 04:17:50,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546321978] [2020-12-22 04:17:50,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:50,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:50,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 04:17:50,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:17:50,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:17:50,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:17:50,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2020-12-22 04:17:50,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555915919] [2020-12-22 04:17:50,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:17:50,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:50,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:17:50,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:17:50,572 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 11 states. [2020-12-22 04:17:50,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:50,724 INFO L93 Difference]: Finished difference Result 122 states and 156 transitions. [2020-12-22 04:17:50,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:17:50,725 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-12-22 04:17:50,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:50,726 INFO L225 Difference]: With dead ends: 122 [2020-12-22 04:17:50,726 INFO L226 Difference]: Without dead ends: 86 [2020-12-22 04:17:50,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:17:50,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-22 04:17:50,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 68. [2020-12-22 04:17:50,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-22 04:17:50,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2020-12-22 04:17:50,738 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 23 [2020-12-22 04:17:50,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:50,739 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2020-12-22 04:17:50,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:17:50,739 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2020-12-22 04:17:50,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 04:17:50,740 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:50,740 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:50,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:50,955 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:50,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:50,956 INFO L82 PathProgramCache]: Analyzing trace with hash -210329187, now seen corresponding path program 1 times [2020-12-22 04:17:50,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:50,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058826346] [2020-12-22 04:17:50,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:50,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:17:51,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058826346] [2020-12-22 04:17:51,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949714747] [2020-12-22 04:17:51,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:51,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:51,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 04:17:51,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:17:51,559 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:51,631 INFO L348 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2020-12-22 04:17:51,631 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2020-12-22 04:17:51,633 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:17:51,641 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:17:51,642 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:17:51,642 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:38 [2020-12-22 04:17:51,918 INFO L348 Elim1Store]: treesize reduction 17, result has 85.8 percent of original size [2020-12-22 04:17:51,919 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 121 [2020-12-22 04:17:51,923 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:17:51,924 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:51,928 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:17:51,977 INFO L625 ElimStorePlain]: treesize reduction 97, result has 27.1 percent of original size [2020-12-22 04:17:51,983 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 04:17:51,984 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:33 [2020-12-22 04:17:52,122 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:52,125 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:52,127 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:52,133 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:52,137 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:17:52,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:17:52,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:17:52,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2020-12-22 04:17:52,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921162279] [2020-12-22 04:17:52,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 04:17:52,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:52,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 04:17:52,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:17:52,172 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand 28 states. [2020-12-22 04:17:54,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:54,009 INFO L93 Difference]: Finished difference Result 166 states and 206 transitions. [2020-12-22 04:17:54,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 04:17:54,010 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 24 [2020-12-22 04:17:54,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:54,012 INFO L225 Difference]: With dead ends: 166 [2020-12-22 04:17:54,013 INFO L226 Difference]: Without dead ends: 99 [2020-12-22 04:17:54,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=443, Invalid=2419, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 04:17:54,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-22 04:17:54,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 54. [2020-12-22 04:17:54,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 04:17:54,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-12-22 04:17:54,025 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 24 [2020-12-22 04:17:54,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:54,026 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-12-22 04:17:54,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 04:17:54,026 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-12-22 04:17:54,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 04:17:54,027 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:54,027 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:54,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:54,242 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:54,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:54,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1447473291, now seen corresponding path program 2 times [2020-12-22 04:17:54,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:54,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596097952] [2020-12-22 04:17:54,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:54,769 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:17:54,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596097952] [2020-12-22 04:17:54,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735201694] [2020-12-22 04:17:54,770 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 [2020-12-22 04:17:54,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:17:54,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:17:54,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 04:17:54,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:17:54,899 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:54,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:17:54,928 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 28 treesize of output 27 [2020-12-22 04:17:54,931 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:17:54,945 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:17:54,948 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 04:17:54,949 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:40 [2020-12-22 04:17:55,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:17:55,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:17:55,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:17:55,021 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:17:55,022 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2020-12-22 04:17:55,024 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:17:55,033 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:17:55,035 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:17:55,036 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:17 [2020-12-22 04:17:55,065 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:55,068 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:55,070 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:55,089 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:17:55,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:17:55,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2020-12-22 04:17:55,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622544537] [2020-12-22 04:17:55,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:17:55,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:55,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:17:55,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:17:55,092 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 17 states. [2020-12-22 04:17:55,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:55,587 INFO L93 Difference]: Finished difference Result 95 states and 116 transitions. [2020-12-22 04:17:55,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 04:17:55,588 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 27 [2020-12-22 04:17:55,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:55,589 INFO L225 Difference]: With dead ends: 95 [2020-12-22 04:17:55,589 INFO L226 Difference]: Without dead ends: 93 [2020-12-22 04:17:55,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:17:55,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-22 04:17:55,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 64. [2020-12-22 04:17:55,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 04:17:55,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2020-12-22 04:17:55,600 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 27 [2020-12-22 04:17:55,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:55,600 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2020-12-22 04:17:55,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:17:55,601 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2020-12-22 04:17:55,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 04:17:55,602 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:55,602 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:55,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 04:17:55,816 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:55,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:55,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1913928053, now seen corresponding path program 2 times [2020-12-22 04:17:55,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:55,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938644326] [2020-12-22 04:17:55,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:55,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:17:56,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938644326] [2020-12-22 04:17:56,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859675851] [2020-12-22 04:17:56,121 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:56,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:17:56,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:17:56,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 04:17:56,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:17:56,287 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-22 04:17:56,288 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:17:56,296 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:17:56,297 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:17:56,298 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:7 [2020-12-22 04:17:56,313 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:56,334 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-12-22 04:17:56,335 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2020-12-22 04:17:56,337 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:17:56,342 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:17:56,343 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:17:56,344 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:15 [2020-12-22 04:17:56,435 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:56,439 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:56,441 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:56,467 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:17:56,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:17:56,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 18 [2020-12-22 04:17:56,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485049851] [2020-12-22 04:17:56,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 04:17:56,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:56,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 04:17:56,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:17:56,470 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand 18 states. [2020-12-22 04:17:57,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:57,191 INFO L93 Difference]: Finished difference Result 183 states and 234 transitions. [2020-12-22 04:17:57,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 04:17:57,192 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 31 [2020-12-22 04:17:57,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:57,193 INFO L225 Difference]: With dead ends: 183 [2020-12-22 04:17:57,193 INFO L226 Difference]: Without dead ends: 151 [2020-12-22 04:17:57,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:17:57,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-22 04:17:57,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 87. [2020-12-22 04:17:57,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-22 04:17:57,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 110 transitions. [2020-12-22 04:17:57,207 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 110 transitions. Word has length 31 [2020-12-22 04:17:57,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:57,208 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 110 transitions. [2020-12-22 04:17:57,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 04:17:57,208 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 110 transitions. [2020-12-22 04:17:57,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 04:17:57,209 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:57,210 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:57,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:57,423 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:57,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:57,424 INFO L82 PathProgramCache]: Analyzing trace with hash -635707062, now seen corresponding path program 1 times [2020-12-22 04:17:57,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:57,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573916048] [2020-12-22 04:17:57,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:57,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:57,845 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:17:57,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573916048] [2020-12-22 04:17:57,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289700486] [2020-12-22 04:17:57,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:57,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 04:17:57,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:17:58,022 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:58,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:17:58,049 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 28 treesize of output 27 [2020-12-22 04:17:58,050 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:17:58,061 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:17:58,067 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 04:17:58,067 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:35 [2020-12-22 04:17:58,129 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:58,133 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:58,142 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:58,183 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:17:58,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:17:58,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2020-12-22 04:17:58,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708243563] [2020-12-22 04:17:58,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 04:17:58,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:58,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 04:17:58,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:17:58,187 INFO L87 Difference]: Start difference. First operand 87 states and 110 transitions. Second operand 19 states. [2020-12-22 04:18:00,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:18:00,193 INFO L93 Difference]: Finished difference Result 235 states and 295 transitions. [2020-12-22 04:18:00,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-22 04:18:00,193 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2020-12-22 04:18:00,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:18:00,196 INFO L225 Difference]: With dead ends: 235 [2020-12-22 04:18:00,196 INFO L226 Difference]: Without dead ends: 203 [2020-12-22 04:18:00,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=652, Invalid=3130, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 04:18:00,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-12-22 04:18:00,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 95. [2020-12-22 04:18:00,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-22 04:18:00,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 118 transitions. [2020-12-22 04:18:00,217 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 118 transitions. Word has length 32 [2020-12-22 04:18:00,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:18:00,220 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 118 transitions. [2020-12-22 04:18:00,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 04:18:00,220 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 118 transitions. [2020-12-22 04:18:00,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 04:18:00,222 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:18:00,222 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:18:00,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:18:00,438 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:18:00,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:18:00,439 INFO L82 PathProgramCache]: Analyzing trace with hash 222375954, now seen corresponding path program 2 times [2020-12-22 04:18:00,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:18:00,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446868738] [2020-12-22 04:18:00,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:18:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:01,120 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:18:01,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446868738] [2020-12-22 04:18:01,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400281619] [2020-12-22 04:18:01,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:18:01,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:18:01,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:18:01,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 04:18:01,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:18:01,296 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:01,397 INFO L348 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2020-12-22 04:18:01,398 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2020-12-22 04:18:01,403 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:01,416 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:01,417 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:18:01,417 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:43 [2020-12-22 04:18:01,730 INFO L348 Elim1Store]: treesize reduction 17, result has 85.8 percent of original size [2020-12-22 04:18:01,731 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 121 [2020-12-22 04:18:01,733 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:01,734 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:01,738 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:01,779 INFO L625 ElimStorePlain]: treesize reduction 99, result has 28.3 percent of original size [2020-12-22 04:18:01,783 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 04:18:01,784 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:67, output treesize:36 [2020-12-22 04:18:02,015 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:02,015 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 125 [2020-12-22 04:18:02,019 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:02,020 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:02,022 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:02,054 INFO L625 ElimStorePlain]: treesize reduction 57, result has 42.4 percent of original size [2020-12-22 04:18:02,058 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 04:18:02,058 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:46, output treesize:33 [2020-12-22 04:18:02,207 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:02,212 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:02,220 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:02,224 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:02,226 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:18:02,262 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:18:02,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:18:02,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2020-12-22 04:18:02,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854403881] [2020-12-22 04:18:02,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 04:18:02,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:18:02,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 04:18:02,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:18:02,265 INFO L87 Difference]: Start difference. First operand 95 states and 118 transitions. Second operand 33 states. [2020-12-22 04:18:03,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:18:03,500 INFO L93 Difference]: Finished difference Result 124 states and 151 transitions. [2020-12-22 04:18:03,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:18:03,500 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 32 [2020-12-22 04:18:03,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:18:03,502 INFO L225 Difference]: With dead ends: 124 [2020-12-22 04:18:03,502 INFO L226 Difference]: Without dead ends: 122 [2020-12-22 04:18:03,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=262, Invalid=1630, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:18:03,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-22 04:18:03,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 92. [2020-12-22 04:18:03,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-22 04:18:03,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 114 transitions. [2020-12-22 04:18:03,519 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 114 transitions. Word has length 32 [2020-12-22 04:18:03,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:18:03,519 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 114 transitions. [2020-12-22 04:18:03,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 04:18:03,520 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 114 transitions. [2020-12-22 04:18:03,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 04:18:03,521 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:18:03,521 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:18:03,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 04:18:03,735 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:18:03,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:18:03,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1757363551, now seen corresponding path program 3 times [2020-12-22 04:18:03,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:18:03,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844346810] [2020-12-22 04:18:03,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:18:03,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:18:04,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844346810] [2020-12-22 04:18:04,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492153672] [2020-12-22 04:18:04,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:18:04,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 04:18:04,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:18:04,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 04:18:04,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:18:04,427 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:18:04,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:18:04,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 14 [2020-12-22 04:18:04,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225129756] [2020-12-22 04:18:04,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 04:18:04,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:18:04,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 04:18:04,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:18:04,429 INFO L87 Difference]: Start difference. First operand 92 states and 114 transitions. Second operand 14 states. [2020-12-22 04:18:04,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:18:04,790 INFO L93 Difference]: Finished difference Result 267 states and 336 transitions. [2020-12-22 04:18:04,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:18:04,791 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-12-22 04:18:04,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:18:04,793 INFO L225 Difference]: With dead ends: 267 [2020-12-22 04:18:04,793 INFO L226 Difference]: Without dead ends: 205 [2020-12-22 04:18:04,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:18:04,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-12-22 04:18:04,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 163. [2020-12-22 04:18:04,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-22 04:18:04,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 198 transitions. [2020-12-22 04:18:04,815 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 198 transitions. Word has length 35 [2020-12-22 04:18:04,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:18:04,816 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 198 transitions. [2020-12-22 04:18:04,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 04:18:04,816 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 198 transitions. [2020-12-22 04:18:04,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 04:18:04,818 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:18:04,818 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:18:05,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:18:05,033 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:18:05,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:18:05,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1000905248, now seen corresponding path program 1 times [2020-12-22 04:18:05,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:18:05,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767446738] [2020-12-22 04:18:05,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:18:05,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:05,351 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:18:05,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767446738] [2020-12-22 04:18:05,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124646483] [2020-12-22 04:18:05,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:18:05,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:05,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 04:18:05,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:18:05,450 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:05,478 INFO L348 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2020-12-22 04:18:05,478 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 29 [2020-12-22 04:18:05,479 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:05,486 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:05,487 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:18:05,487 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:39 [2020-12-22 04:18:05,681 INFO L348 Elim1Store]: treesize reduction 12, result has 87.4 percent of original size [2020-12-22 04:18:05,682 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 103 [2020-12-22 04:18:05,684 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:05,685 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:05,687 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:05,714 INFO L625 ElimStorePlain]: treesize reduction 72, result has 29.4 percent of original size [2020-12-22 04:18:05,716 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 04:18:05,716 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:27 [2020-12-22 04:18:05,819 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:05,821 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:05,822 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:05,853 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:18:05,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:18:05,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 21 [2020-12-22 04:18:05,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433740578] [2020-12-22 04:18:05,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:18:05,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:18:05,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:18:05,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:18:05,856 INFO L87 Difference]: Start difference. First operand 163 states and 198 transitions. Second operand 21 states. [2020-12-22 04:18:06,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:18:06,624 INFO L93 Difference]: Finished difference Result 193 states and 234 transitions. [2020-12-22 04:18:06,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 04:18:06,624 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 36 [2020-12-22 04:18:06,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:18:06,626 INFO L225 Difference]: With dead ends: 193 [2020-12-22 04:18:06,626 INFO L226 Difference]: Without dead ends: 181 [2020-12-22 04:18:06,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:18:06,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-12-22 04:18:06,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 165. [2020-12-22 04:18:06,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-22 04:18:06,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 201 transitions. [2020-12-22 04:18:06,644 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 201 transitions. Word has length 36 [2020-12-22 04:18:06,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:18:06,644 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 201 transitions. [2020-12-22 04:18:06,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:18:06,645 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 201 transitions. [2020-12-22 04:18:06,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 04:18:06,646 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:18:06,646 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:18:06,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:18:06,861 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:18:06,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:18:06,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1716712809, now seen corresponding path program 3 times [2020-12-22 04:18:06,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:18:06,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551534176] [2020-12-22 04:18:06,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:18:06,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:18:07,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551534176] [2020-12-22 04:18:07,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414301670] [2020-12-22 04:18:07,500 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:18:07,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 04:18:07,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:18:07,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 04:18:07,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:18:07,680 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:07,763 INFO L348 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2020-12-22 04:18:07,763 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2020-12-22 04:18:07,765 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:07,772 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:07,773 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:18:07,773 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:35 [2020-12-22 04:18:07,991 INFO L348 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2020-12-22 04:18:07,991 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 31 [2020-12-22 04:18:07,993 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:08,000 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:08,003 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 04:18:08,003 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:30 [2020-12-22 04:18:08,141 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:08,143 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:08,145 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:08,148 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:08,149 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:18:08,182 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 04:18:08,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:18:08,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 31 [2020-12-22 04:18:08,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356935842] [2020-12-22 04:18:08,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 04:18:08,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:18:08,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 04:18:08,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:18:08,184 INFO L87 Difference]: Start difference. First operand 165 states and 201 transitions. Second operand 31 states. [2020-12-22 04:18:11,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:18:11,996 INFO L93 Difference]: Finished difference Result 304 states and 367 transitions. [2020-12-22 04:18:11,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-22 04:18:11,997 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 37 [2020-12-22 04:18:11,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:18:11,999 INFO L225 Difference]: With dead ends: 304 [2020-12-22 04:18:11,999 INFO L226 Difference]: Without dead ends: 213 [2020-12-22 04:18:12,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2510 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=941, Invalid=6891, Unknown=0, NotChecked=0, Total=7832 [2020-12-22 04:18:12,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-12-22 04:18:12,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 132. [2020-12-22 04:18:12,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-22 04:18:12,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 155 transitions. [2020-12-22 04:18:12,016 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 155 transitions. Word has length 37 [2020-12-22 04:18:12,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:18:12,016 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 155 transitions. [2020-12-22 04:18:12,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 04:18:12,016 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 155 transitions. [2020-12-22 04:18:12,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 04:18:12,017 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:18:12,018 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:18:12,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 04:18:12,232 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:18:12,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:18:12,232 INFO L82 PathProgramCache]: Analyzing trace with hash -336019396, now seen corresponding path program 4 times [2020-12-22 04:18:12,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:18:12,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131282155] [2020-12-22 04:18:12,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:18:12,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:12,877 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:18:12,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131282155] [2020-12-22 04:18:12,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800213119] [2020-12-22 04:18:12,877 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:18:12,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:18:12,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:18:12,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 04:18:12,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:18:12,977 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-22 04:18:12,980 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:12,988 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:12,991 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:18:12,991 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:10 [2020-12-22 04:18:13,012 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:13,040 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 32 treesize of output 27 [2020-12-22 04:18:13,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:13,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:13,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:13,051 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 24 [2020-12-22 04:18:13,052 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:13,057 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:13,058 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:18:13,066 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:13,067 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:18:13,068 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:26 [2020-12-22 04:18:13,208 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 42 treesize of output 35 [2020-12-22 04:18:13,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:13,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:13,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:13,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:13,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:13,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:13,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:13,223 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 36 [2020-12-22 04:18:13,225 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:13,231 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:13,231 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:18:13,243 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:13,246 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 04:18:13,246 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:55, output treesize:31 [2020-12-22 04:18:13,377 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:13,379 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:13,381 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:13,416 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:18:13,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:18:13,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 23 [2020-12-22 04:18:13,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104728674] [2020-12-22 04:18:13,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 04:18:13,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:18:13,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 04:18:13,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:18:13,418 INFO L87 Difference]: Start difference. First operand 132 states and 155 transitions. Second operand 23 states. [2020-12-22 04:18:14,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:18:14,365 INFO L93 Difference]: Finished difference Result 258 states and 317 transitions. [2020-12-22 04:18:14,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 04:18:14,365 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 39 [2020-12-22 04:18:14,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:18:14,367 INFO L225 Difference]: With dead ends: 258 [2020-12-22 04:18:14,367 INFO L226 Difference]: Without dead ends: 222 [2020-12-22 04:18:14,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 12 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:18:14,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-12-22 04:18:14,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 158. [2020-12-22 04:18:14,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-12-22 04:18:14,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 188 transitions. [2020-12-22 04:18:14,386 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 188 transitions. Word has length 39 [2020-12-22 04:18:14,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:18:14,387 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 188 transitions. [2020-12-22 04:18:14,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 04:18:14,387 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 188 transitions. [2020-12-22 04:18:14,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 04:18:14,388 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:18:14,388 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:18:14,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 04:18:14,602 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:18:14,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:18:14,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1292986487, now seen corresponding path program 1 times [2020-12-22 04:18:14,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:18:14,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672440285] [2020-12-22 04:18:14,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:18:14,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:15,453 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:18:15,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672440285] [2020-12-22 04:18:15,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552828050] [2020-12-22 04:18:15,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:18:15,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:15,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 04:18:15,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:18:15,594 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:15,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:15,640 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 34 treesize of output 33 [2020-12-22 04:18:15,642 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:15,668 INFO L625 ElimStorePlain]: treesize reduction 7, result has 83.7 percent of original size [2020-12-22 04:18:15,670 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:18:15,670 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:33 [2020-12-22 04:18:15,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:15,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:15,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:15,794 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:15,794 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2020-12-22 04:18:15,796 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:15,804 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:15,806 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:18:15,807 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:17 [2020-12-22 04:18:15,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:15,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:15,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:15,836 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:15,836 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2020-12-22 04:18:15,838 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:15,847 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:15,849 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:18:15,849 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:17 [2020-12-22 04:18:15,882 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:15,884 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:15,885 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:15,915 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-22 04:18:15,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:18:15,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15] total 26 [2020-12-22 04:18:15,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747618648] [2020-12-22 04:18:15,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 04:18:15,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:18:15,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 04:18:15,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:18:15,920 INFO L87 Difference]: Start difference. First operand 158 states and 188 transitions. Second operand 26 states. [2020-12-22 04:18:17,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:18:17,446 INFO L93 Difference]: Finished difference Result 285 states and 341 transitions. [2020-12-22 04:18:17,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 04:18:17,447 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 40 [2020-12-22 04:18:17,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:18:17,449 INFO L225 Difference]: With dead ends: 285 [2020-12-22 04:18:17,449 INFO L226 Difference]: Without dead ends: 283 [2020-12-22 04:18:17,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 32 SyntacticMatches, 9 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=404, Invalid=1852, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:18:17,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-12-22 04:18:17,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 161. [2020-12-22 04:18:17,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-12-22 04:18:17,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 192 transitions. [2020-12-22 04:18:17,469 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 192 transitions. Word has length 40 [2020-12-22 04:18:17,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:18:17,469 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 192 transitions. [2020-12-22 04:18:17,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 04:18:17,469 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 192 transitions. [2020-12-22 04:18:17,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 04:18:17,470 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:18:17,470 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:18:17,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 04:18:17,680 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:18:17,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:18:17,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1122199553, now seen corresponding path program 2 times [2020-12-22 04:18:17,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:18:17,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531592338] [2020-12-22 04:18:17,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:18:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:18,504 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:18:18,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531592338] [2020-12-22 04:18:18,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555168270] [2020-12-22 04:18:18,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:18:18,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:18:18,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:18:18,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 04:18:18,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:18:18,766 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:18,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:18,918 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 28 treesize of output 27 [2020-12-22 04:18:18,920 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:18,933 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:18,936 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 04:18:18,936 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:35 [2020-12-22 04:18:19,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:19,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:19,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:19,093 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:19,094 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2020-12-22 04:18:19,095 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:19,106 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:19,108 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:18:19,108 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:17 [2020-12-22 04:18:19,142 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:19,143 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:19,145 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:19,184 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:18:19,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:18:19,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 29 [2020-12-22 04:18:19,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984497294] [2020-12-22 04:18:19,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 04:18:19,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:18:19,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 04:18:19,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:18:19,187 INFO L87 Difference]: Start difference. First operand 161 states and 192 transitions. Second operand 29 states. [2020-12-22 04:18:22,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:18:22,033 INFO L93 Difference]: Finished difference Result 283 states and 341 transitions. [2020-12-22 04:18:22,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 04:18:22,034 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 40 [2020-12-22 04:18:22,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:18:22,036 INFO L225 Difference]: With dead ends: 283 [2020-12-22 04:18:22,036 INFO L226 Difference]: Without dead ends: 248 [2020-12-22 04:18:22,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 32 SyntacticMatches, 10 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=744, Invalid=3162, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 04:18:22,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-12-22 04:18:22,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 175. [2020-12-22 04:18:22,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-22 04:18:22,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 213 transitions. [2020-12-22 04:18:22,059 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 213 transitions. Word has length 40 [2020-12-22 04:18:22,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:18:22,059 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 213 transitions. [2020-12-22 04:18:22,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 04:18:22,059 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 213 transitions. [2020-12-22 04:18:22,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 04:18:22,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:18:22,060 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:18:22,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:18:22,274 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:18:22,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:18:22,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1167216441, now seen corresponding path program 4 times [2020-12-22 04:18:22,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:18:22,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947868832] [2020-12-22 04:18:22,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:18:22,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:23,066 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:18:23,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947868832] [2020-12-22 04:18:23,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594071623] [2020-12-22 04:18:23,067 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:18:23,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:18:23,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:18:23,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 04:18:23,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:18:23,208 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:23,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:23,314 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 36 treesize of output 27 [2020-12-22 04:18:23,317 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:23,334 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:23,335 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:18:23,335 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:45 [2020-12-22 04:18:23,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:23,631 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:23,631 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 31 [2020-12-22 04:18:23,633 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:23,652 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:23,655 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 04:18:23,655 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:67, output treesize:39 [2020-12-22 04:18:23,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:23,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:23,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:23,774 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:23,774 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2020-12-22 04:18:23,775 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:23,786 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:23,790 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:18:23,790 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:27 [2020-12-22 04:18:23,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:23,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:23,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:23,957 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:23,958 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2020-12-22 04:18:23,959 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:23,970 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:23,972 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:18:23,972 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:19 [2020-12-22 04:18:24,011 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:24,013 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:24,015 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:24,053 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:18:24,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:18:24,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 32 [2020-12-22 04:18:24,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638544537] [2020-12-22 04:18:24,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 04:18:24,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:18:24,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 04:18:24,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:18:24,056 INFO L87 Difference]: Start difference. First operand 175 states and 213 transitions. Second operand 32 states. [2020-12-22 04:18:25,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:18:25,467 INFO L93 Difference]: Finished difference Result 300 states and 368 transitions. [2020-12-22 04:18:25,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 04:18:25,468 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 40 [2020-12-22 04:18:25,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:18:25,470 INFO L225 Difference]: With dead ends: 300 [2020-12-22 04:18:25,470 INFO L226 Difference]: Without dead ends: 242 [2020-12-22 04:18:25,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=341, Invalid=2109, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:18:25,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-12-22 04:18:25,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 183. [2020-12-22 04:18:25,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-12-22 04:18:25,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 225 transitions. [2020-12-22 04:18:25,493 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 225 transitions. Word has length 40 [2020-12-22 04:18:25,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:18:25,494 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 225 transitions. [2020-12-22 04:18:25,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 04:18:25,494 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 225 transitions. [2020-12-22 04:18:25,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 04:18:25,495 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:18:25,495 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:18:25,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 04:18:25,709 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:18:25,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:18:25,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1721163603, now seen corresponding path program 1 times [2020-12-22 04:18:25,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:18:25,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067250212] [2020-12-22 04:18:25,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:18:25,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:26,881 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:18:26,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067250212] [2020-12-22 04:18:26,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588424154] [2020-12-22 04:18:26,882 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2020-12-22 04:18:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:26,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 04:18:26,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:18:27,013 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:27,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:27,042 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 34 treesize of output 33 [2020-12-22 04:18:27,044 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:27,066 INFO L625 ElimStorePlain]: treesize reduction 7, result has 83.7 percent of original size [2020-12-22 04:18:27,067 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:18:27,068 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:33 [2020-12-22 04:18:27,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:27,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:27,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:27,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:27,200 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 04:18:27,203 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:27,203 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 46 [2020-12-22 04:18:27,205 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:27,227 INFO L625 ElimStorePlain]: treesize reduction 17, result has 71.2 percent of original size [2020-12-22 04:18:27,228 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:18:27,229 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:42 [2020-12-22 04:18:27,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:27,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:27,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:27,519 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 04:18:27,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:27,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:27,523 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 04:18:27,525 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:27,525 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 58 [2020-12-22 04:18:27,527 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:27,552 INFO L625 ElimStorePlain]: treesize reduction 35, result has 52.1 percent of original size [2020-12-22 04:18:27,554 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:18:27,554 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:32 [2020-12-22 04:18:27,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:27,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:27,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:27,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:27,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:27,777 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:27,778 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 70 [2020-12-22 04:18:27,781 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:27,817 INFO L625 ElimStorePlain]: treesize reduction 17, result has 76.7 percent of original size [2020-12-22 04:18:27,819 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:27,820 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:18:27,821 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:50 [2020-12-22 04:18:28,056 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:28,057 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:28,058 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:18:28,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:18:28,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 38 [2020-12-22 04:18:28,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721748754] [2020-12-22 04:18:28,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 04:18:28,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:18:28,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 04:18:28,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1203, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:18:28,106 INFO L87 Difference]: Start difference. First operand 183 states and 225 transitions. Second operand 38 states. [2020-12-22 04:18:34,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:18:34,030 INFO L93 Difference]: Finished difference Result 426 states and 526 transitions. [2020-12-22 04:18:34,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-22 04:18:34,031 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2020-12-22 04:18:34,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:18:34,032 INFO L225 Difference]: With dead ends: 426 [2020-12-22 04:18:34,032 INFO L226 Difference]: Without dead ends: 351 [2020-12-22 04:18:34,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3115 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1226, Invalid=8280, Unknown=0, NotChecked=0, Total=9506 [2020-12-22 04:18:34,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-12-22 04:18:34,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 249. [2020-12-22 04:18:34,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-12-22 04:18:34,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 316 transitions. [2020-12-22 04:18:34,066 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 316 transitions. Word has length 41 [2020-12-22 04:18:34,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:18:34,066 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 316 transitions. [2020-12-22 04:18:34,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 04:18:34,066 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 316 transitions. [2020-12-22 04:18:34,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 04:18:34,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:18:34,067 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:18:34,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 04:18:34,276 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:18:34,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:18:34,277 INFO L82 PathProgramCache]: Analyzing trace with hash -840467502, now seen corresponding path program 5 times [2020-12-22 04:18:34,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:18:34,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173224267] [2020-12-22 04:18:34,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:18:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:34,836 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:18:34,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173224267] [2020-12-22 04:18:34,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671980941] [2020-12-22 04:18:34,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:18:35,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-22 04:18:35,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:18:35,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 04:18:35,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:18:35,087 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 04:18:35,088 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:35,095 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:35,096 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:18:35,097 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2020-12-22 04:18:35,118 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:35,199 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 34 treesize of output 29 [2020-12-22 04:18:35,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:35,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:35,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:35,211 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 25 [2020-12-22 04:18:35,213 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:35,218 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:35,218 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:18:35,233 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:35,235 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 04:18:35,236 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:47, output treesize:32 [2020-12-22 04:18:35,383 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:35,385 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:35,387 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:35,388 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:35,389 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:18:35,420 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:18:35,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:18:35,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2020-12-22 04:18:35,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545342164] [2020-12-22 04:18:35,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 04:18:35,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:18:35,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 04:18:35,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:18:35,422 INFO L87 Difference]: Start difference. First operand 249 states and 316 transitions. Second operand 19 states. [2020-12-22 04:18:36,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:18:36,722 INFO L93 Difference]: Finished difference Result 561 states and 741 transitions. [2020-12-22 04:18:36,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 04:18:36,723 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2020-12-22 04:18:36,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:18:36,726 INFO L225 Difference]: With dead ends: 561 [2020-12-22 04:18:36,726 INFO L226 Difference]: Without dead ends: 418 [2020-12-22 04:18:36,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 11 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:18:36,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-12-22 04:18:36,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 273. [2020-12-22 04:18:36,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-12-22 04:18:36,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 344 transitions. [2020-12-22 04:18:36,766 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 344 transitions. Word has length 43 [2020-12-22 04:18:36,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:18:36,767 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 344 transitions. [2020-12-22 04:18:36,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 04:18:36,767 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 344 transitions. [2020-12-22 04:18:36,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 04:18:36,768 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:18:36,768 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:18:36,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 04:18:36,974 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:18:36,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:18:36,974 INFO L82 PathProgramCache]: Analyzing trace with hash 632000141, now seen corresponding path program 1 times [2020-12-22 04:18:36,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:18:36,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020533565] [2020-12-22 04:18:36,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:18:37,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:37,277 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:18:37,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020533565] [2020-12-22 04:18:37,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395562238] [2020-12-22 04:18:37,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:18:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:37,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 04:18:37,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:18:37,399 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:37,477 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:37,499 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-12-22 04:18:37,500 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2020-12-22 04:18:37,501 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:37,508 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:37,509 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:18:37,509 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:15 [2020-12-22 04:18:37,599 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:37,601 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:37,603 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:37,630 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:18:37,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:18:37,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 23 [2020-12-22 04:18:37,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975971474] [2020-12-22 04:18:37,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 04:18:37,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:18:37,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 04:18:37,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:18:37,632 INFO L87 Difference]: Start difference. First operand 273 states and 344 transitions. Second operand 23 states. [2020-12-22 04:18:39,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:18:39,160 INFO L93 Difference]: Finished difference Result 577 states and 757 transitions. [2020-12-22 04:18:39,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 04:18:39,161 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2020-12-22 04:18:39,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:18:39,165 INFO L225 Difference]: With dead ends: 577 [2020-12-22 04:18:39,165 INFO L226 Difference]: Without dead ends: 461 [2020-12-22 04:18:39,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=373, Invalid=2077, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:18:39,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2020-12-22 04:18:39,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 310. [2020-12-22 04:18:39,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-12-22 04:18:39,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 397 transitions. [2020-12-22 04:18:39,208 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 397 transitions. Word has length 44 [2020-12-22 04:18:39,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:18:39,208 INFO L481 AbstractCegarLoop]: Abstraction has 310 states and 397 transitions. [2020-12-22 04:18:39,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 04:18:39,208 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 397 transitions. [2020-12-22 04:18:39,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 04:18:39,209 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:18:39,209 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:18:39,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:18:39,420 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:18:39,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:18:39,421 INFO L82 PathProgramCache]: Analyzing trace with hash 906213909, now seen corresponding path program 2 times [2020-12-22 04:18:39,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:18:39,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736763532] [2020-12-22 04:18:39,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:18:39,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:40,119 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:18:40,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736763532] [2020-12-22 04:18:40,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781558134] [2020-12-22 04:18:40,119 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:18:40,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:18:40,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:18:40,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 04:18:40,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:18:40,253 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:40,382 INFO L348 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2020-12-22 04:18:40,382 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2020-12-22 04:18:40,384 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:40,394 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:40,395 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:18:40,396 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:44 [2020-12-22 04:18:40,760 INFO L348 Elim1Store]: treesize reduction 17, result has 85.8 percent of original size [2020-12-22 04:18:40,761 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 121 [2020-12-22 04:18:40,763 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:40,763 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:40,768 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:40,812 INFO L625 ElimStorePlain]: treesize reduction 99, result has 26.1 percent of original size [2020-12-22 04:18:40,814 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:18:40,814 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:27 [2020-12-22 04:18:41,006 INFO L348 Elim1Store]: treesize reduction 12, result has 87.4 percent of original size [2020-12-22 04:18:41,006 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 100 [2020-12-22 04:18:41,009 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:41,010 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:41,012 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:41,039 INFO L625 ElimStorePlain]: treesize reduction 43, result has 43.4 percent of original size [2020-12-22 04:18:41,040 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:18:41,041 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:17 [2020-12-22 04:18:41,175 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:41,176 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:41,178 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:41,224 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:18:41,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:18:41,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 33 [2020-12-22 04:18:41,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211568189] [2020-12-22 04:18:41,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 04:18:41,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:18:41,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 04:18:41,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:18:41,227 INFO L87 Difference]: Start difference. First operand 310 states and 397 transitions. Second operand 33 states. [2020-12-22 04:18:43,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:18:43,997 INFO L93 Difference]: Finished difference Result 452 states and 578 transitions. [2020-12-22 04:18:43,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-22 04:18:43,998 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 44 [2020-12-22 04:18:43,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:18:43,999 INFO L225 Difference]: With dead ends: 452 [2020-12-22 04:18:43,999 INFO L226 Difference]: Without dead ends: 373 [2020-12-22 04:18:44,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=482, Invalid=3300, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 04:18:44,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-12-22 04:18:44,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 320. [2020-12-22 04:18:44,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-12-22 04:18:44,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 412 transitions. [2020-12-22 04:18:44,042 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 412 transitions. Word has length 44 [2020-12-22 04:18:44,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:18:44,043 INFO L481 AbstractCegarLoop]: Abstraction has 320 states and 412 transitions. [2020-12-22 04:18:44,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 04:18:44,043 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 412 transitions. [2020-12-22 04:18:44,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 04:18:44,044 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:18:44,044 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:18:44,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:18:44,257 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:18:44,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:18:44,258 INFO L82 PathProgramCache]: Analyzing trace with hash 647596744, now seen corresponding path program 1 times [2020-12-22 04:18:44,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:18:44,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417649659] [2020-12-22 04:18:44,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:18:44,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:44,284 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 04:18:44,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417649659] [2020-12-22 04:18:44,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:18:44,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:18:44,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323096515] [2020-12-22 04:18:44,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:18:44,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:18:44,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:18:44,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:18:44,286 INFO L87 Difference]: Start difference. First operand 320 states and 412 transitions. Second operand 3 states. [2020-12-22 04:18:44,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:18:44,330 INFO L93 Difference]: Finished difference Result 382 states and 497 transitions. [2020-12-22 04:18:44,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:18:44,331 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-12-22 04:18:44,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:18:44,332 INFO L225 Difference]: With dead ends: 382 [2020-12-22 04:18:44,333 INFO L226 Difference]: Without dead ends: 303 [2020-12-22 04:18:44,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:18:44,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-12-22 04:18:44,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 296. [2020-12-22 04:18:44,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-12-22 04:18:44,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 371 transitions. [2020-12-22 04:18:44,372 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 371 transitions. Word has length 45 [2020-12-22 04:18:44,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:18:44,372 INFO L481 AbstractCegarLoop]: Abstraction has 296 states and 371 transitions. [2020-12-22 04:18:44,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:18:44,372 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 371 transitions. [2020-12-22 04:18:44,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 04:18:44,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:18:44,373 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:18:44,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 04:18:44,374 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:18:44,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:18:44,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1747430856, now seen corresponding path program 5 times [2020-12-22 04:18:44,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:18:44,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335679289] [2020-12-22 04:18:44,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:18:44,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:45,174 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 5 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:18:45,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335679289] [2020-12-22 04:18:45,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133397274] [2020-12-22 04:18:45,174 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 [2020-12-22 04:18:45,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 04:18:45,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:18:45,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 04:18:45,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:18:45,697 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:45,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:45,845 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 36 treesize of output 27 [2020-12-22 04:18:45,847 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:45,865 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:45,866 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:18:45,866 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:47 [2020-12-22 04:18:46,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:46,044 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:46,044 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 31 [2020-12-22 04:18:46,045 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:46,060 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:46,061 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:18:46,061 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:31 [2020-12-22 04:18:46,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:46,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:46,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:46,259 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:46,259 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2020-12-22 04:18:46,261 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:46,273 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:46,275 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:18:46,275 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:19 [2020-12-22 04:18:46,314 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:46,316 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:46,318 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:46,364 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 04:18:46,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:18:46,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 34 [2020-12-22 04:18:46,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334090610] [2020-12-22 04:18:46,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 04:18:46,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:18:46,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 04:18:46,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:18:46,366 INFO L87 Difference]: Start difference. First operand 296 states and 371 transitions. Second operand 34 states. [2020-12-22 04:18:49,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:18:49,742 INFO L93 Difference]: Finished difference Result 656 states and 819 transitions. [2020-12-22 04:18:49,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-22 04:18:49,745 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 45 [2020-12-22 04:18:49,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:18:49,748 INFO L225 Difference]: With dead ends: 656 [2020-12-22 04:18:49,748 INFO L226 Difference]: Without dead ends: 552 [2020-12-22 04:18:49,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=704, Invalid=4996, Unknown=0, NotChecked=0, Total=5700 [2020-12-22 04:18:49,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2020-12-22 04:18:49,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 369. [2020-12-22 04:18:49,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-12-22 04:18:49,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 470 transitions. [2020-12-22 04:18:49,801 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 470 transitions. Word has length 45 [2020-12-22 04:18:49,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:18:49,801 INFO L481 AbstractCegarLoop]: Abstraction has 369 states and 470 transitions. [2020-12-22 04:18:49,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 04:18:49,801 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 470 transitions. [2020-12-22 04:18:49,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 04:18:49,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:18:49,802 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:18:50,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 04:18:50,016 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:18:50,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:18:50,016 INFO L82 PathProgramCache]: Analyzing trace with hash -583456118, now seen corresponding path program 2 times [2020-12-22 04:18:50,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:18:50,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242775415] [2020-12-22 04:18:50,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:18:50,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:51,209 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:18:51,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242775415] [2020-12-22 04:18:51,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996417381] [2020-12-22 04:18:51,209 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:18:51,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:18:51,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:18:51,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 04:18:51,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:18:51,382 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:51,510 INFO L348 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2020-12-22 04:18:51,511 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2020-12-22 04:18:51,512 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:51,526 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:51,527 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:18:51,527 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:44 [2020-12-22 04:18:51,909 INFO L348 Elim1Store]: treesize reduction 17, result has 85.8 percent of original size [2020-12-22 04:18:51,910 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 121 [2020-12-22 04:18:51,912 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:51,913 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:51,915 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:51,963 INFO L625 ElimStorePlain]: treesize reduction 99, result has 28.3 percent of original size [2020-12-22 04:18:51,966 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 04:18:51,967 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:68, output treesize:36 [2020-12-22 04:18:52,299 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-22 04:18:52,301 INFO L348 Elim1Store]: treesize reduction 72, result has 65.4 percent of original size [2020-12-22 04:18:52,301 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 151 [2020-12-22 04:18:52,304 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:52,308 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:52,308 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:52,310 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:52,371 INFO L625 ElimStorePlain]: treesize reduction 81, result has 40.9 percent of original size [2020-12-22 04:18:52,374 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 04:18:52,374 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:56 [2020-12-22 04:18:53,079 WARN L197 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 74 [2020-12-22 04:18:53,080 INFO L348 Elim1Store]: treesize reduction 112, result has 71.3 percent of original size [2020-12-22 04:18:53,080 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 296 [2020-12-22 04:18:53,087 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 2, 1] term [2020-12-22 04:18:53,087 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-22 04:18:53,088 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 1] term [2020-12-22 04:18:53,088 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:18:53,089 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-12-22 04:18:53,089 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:18:53,089 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-12-22 04:18:53,090 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:53,090 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-12-22 04:18:53,090 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:53,092 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:53,093 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:18:53,094 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:53,094 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:53,096 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:53,097 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:53,097 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:53,098 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:53,099 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 04:18:53,100 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 04:18:53,103 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:18:53,120 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:53,120 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:53,123 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:53,124 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:53,125 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:53,125 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:53,125 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:53,129 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:53,129 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:53,130 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:53,130 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:53,133 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:53,134 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:53,134 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:53,135 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:53,135 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:53,137 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 04:18:53,137 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 04:18:53,140 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:18:53,141 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:53,142 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:53,144 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:18:53,145 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:53,145 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:53,162 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:53,362 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 30 [2020-12-22 04:18:53,363 INFO L625 ElimStorePlain]: treesize reduction 871, result has 6.0 percent of original size [2020-12-22 04:18:53,365 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 04:18:53,366 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:78, output treesize:53 [2020-12-22 04:18:53,994 WARN L197 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-12-22 04:18:53,995 INFO L348 Elim1Store]: treesize reduction 17, result has 94.2 percent of original size [2020-12-22 04:18:53,996 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 294 [2020-12-22 04:18:53,999 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 2, 1] term [2020-12-22 04:18:53,999 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-22 04:18:54,000 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 1] term [2020-12-22 04:18:54,000 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:18:54,001 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-12-22 04:18:54,001 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:18:54,001 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-12-22 04:18:54,002 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:54,002 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-12-22 04:18:54,002 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:54,004 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:54,004 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:54,005 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:54,005 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:54,005 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:54,007 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:54,007 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 04:18:54,008 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:54,009 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:54,011 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-22 04:18:54,011 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:18:54,011 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:18:54,012 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:54,013 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:54,016 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 04:18:54,017 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:54,017 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:54,019 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:54,021 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:54,022 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:54,023 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:54,023 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-12-22 04:18:54,024 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:54,026 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-12-22 04:18:54,027 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:54,027 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-12-22 04:18:54,028 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:54,029 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:54,030 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:54,031 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:54,032 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:18:54,033 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:54,034 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:54,036 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:18:54,037 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:54,038 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:54,040 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:18:54,041 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:54,041 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:54,055 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:54,376 WARN L197 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 38 [2020-12-22 04:18:54,377 INFO L625 ElimStorePlain]: treesize reduction 1125, result has 7.9 percent of original size [2020-12-22 04:18:54,390 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:54,392 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:54,393 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:54,395 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:54,398 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:54,399 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:18:54,402 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 04:18:54,402 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:72, output treesize:78 [2020-12-22 04:18:54,403 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:54,404 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:54,405 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:18:54,498 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:54,500 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:54,501 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:18:54,614 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:54,616 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:54,617 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:18:54,753 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:54,755 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:54,756 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:18:55,128 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:55,129 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:55,130 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:55,132 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:55,134 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:18:55,210 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:18:55,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:18:55,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2020-12-22 04:18:55,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667652654] [2020-12-22 04:18:55,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-22 04:18:55,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:18:55,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-22 04:18:55,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=2245, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:18:55,212 INFO L87 Difference]: Start difference. First operand 369 states and 470 transitions. Second operand 50 states. [2020-12-22 04:18:57,276 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2020-12-22 04:18:59,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:18:59,280 INFO L93 Difference]: Finished difference Result 444 states and 554 transitions. [2020-12-22 04:18:59,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 04:18:59,281 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 46 [2020-12-22 04:18:59,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:18:59,283 INFO L225 Difference]: With dead ends: 444 [2020-12-22 04:18:59,284 INFO L226 Difference]: Without dead ends: 406 [2020-12-22 04:18:59,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2129 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=528, Invalid=5324, Unknown=0, NotChecked=0, Total=5852 [2020-12-22 04:18:59,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-12-22 04:18:59,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 302. [2020-12-22 04:18:59,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-12-22 04:18:59,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 396 transitions. [2020-12-22 04:18:59,325 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 396 transitions. Word has length 46 [2020-12-22 04:18:59,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:18:59,326 INFO L481 AbstractCegarLoop]: Abstraction has 302 states and 396 transitions. [2020-12-22 04:18:59,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-22 04:18:59,326 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 396 transitions. [2020-12-22 04:18:59,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 04:18:59,327 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:18:59,327 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:18:59,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 04:18:59,542 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:18:59,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:18:59,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1547861096, now seen corresponding path program 6 times [2020-12-22 04:18:59,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:18:59,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837895913] [2020-12-22 04:18:59,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:18:59,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:59,834 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 04:18:59,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837895913] [2020-12-22 04:18:59,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074300241] [2020-12-22 04:18:59,835 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:00,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-22 04:19:00,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:19:00,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 04:19:00,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:19:00,383 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 04:19:00,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:19:00,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2020-12-22 04:19:00,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240462618] [2020-12-22 04:19:00,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 04:19:00,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:19:00,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 04:19:00,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:19:00,386 INFO L87 Difference]: Start difference. First operand 302 states and 396 transitions. Second operand 20 states. [2020-12-22 04:19:01,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:19:01,077 INFO L93 Difference]: Finished difference Result 828 states and 1079 transitions. [2020-12-22 04:19:01,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 04:19:01,078 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-12-22 04:19:01,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:19:01,081 INFO L225 Difference]: With dead ends: 828 [2020-12-22 04:19:01,081 INFO L226 Difference]: Without dead ends: 620 [2020-12-22 04:19:01,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:19:01,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2020-12-22 04:19:01,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 406. [2020-12-22 04:19:01,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406 states. [2020-12-22 04:19:01,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 512 transitions. [2020-12-22 04:19:01,146 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 512 transitions. Word has length 47 [2020-12-22 04:19:01,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:19:01,146 INFO L481 AbstractCegarLoop]: Abstraction has 406 states and 512 transitions. [2020-12-22 04:19:01,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 04:19:01,146 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 512 transitions. [2020-12-22 04:19:01,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 04:19:01,147 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:19:01,147 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:19:01,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:01,360 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:19:01,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:19:01,361 INFO L82 PathProgramCache]: Analyzing trace with hash 972601763, now seen corresponding path program 2 times [2020-12-22 04:19:01,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:19:01,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257933168] [2020-12-22 04:19:01,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:19:01,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:19:01,954 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:19:01,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257933168] [2020-12-22 04:19:01,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513024004] [2020-12-22 04:19:01,955 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:02,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:19:02,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:19:02,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 04:19:02,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:19:02,200 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 26 treesize of output 21 [2020-12-22 04:19:02,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:02,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:02,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:02,208 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 16 treesize of output 20 [2020-12-22 04:19:02,209 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:02,215 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:02,216 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:02,226 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:02,227 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:02,227 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:17 [2020-12-22 04:19:02,369 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:02,372 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:02,374 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:02,376 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:02,377 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:19:02,421 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:19:02,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:19:02,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 21 [2020-12-22 04:19:02,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647273567] [2020-12-22 04:19:02,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:19:02,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:19:02,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:19:02,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:19:02,423 INFO L87 Difference]: Start difference. First operand 406 states and 512 transitions. Second operand 21 states. [2020-12-22 04:19:03,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:19:03,982 INFO L93 Difference]: Finished difference Result 504 states and 639 transitions. [2020-12-22 04:19:03,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 04:19:03,982 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-12-22 04:19:03,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:19:03,985 INFO L225 Difference]: With dead ends: 504 [2020-12-22 04:19:03,985 INFO L226 Difference]: Without dead ends: 487 [2020-12-22 04:19:03,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=289, Invalid=1351, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:19:03,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2020-12-22 04:19:04,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 386. [2020-12-22 04:19:04,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2020-12-22 04:19:04,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 484 transitions. [2020-12-22 04:19:04,045 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 484 transitions. Word has length 48 [2020-12-22 04:19:04,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:19:04,046 INFO L481 AbstractCegarLoop]: Abstraction has 386 states and 484 transitions. [2020-12-22 04:19:04,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:19:04,046 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 484 transitions. [2020-12-22 04:19:04,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 04:19:04,047 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:19:04,047 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:19:04,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 04:19:04,261 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:19:04,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:19:04,262 INFO L82 PathProgramCache]: Analyzing trace with hash 2023640862, now seen corresponding path program 1 times [2020-12-22 04:19:04,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:19:04,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496858678] [2020-12-22 04:19:04,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:19:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:19:04,901 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:19:04,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496858678] [2020-12-22 04:19:04,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081264099] [2020-12-22 04:19:04,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:04,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:19:04,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 04:19:04,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:19:05,114 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:05,237 INFO L348 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2020-12-22 04:19:05,237 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2020-12-22 04:19:05,238 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:05,250 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:05,251 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:05,251 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:38 [2020-12-22 04:19:05,631 INFO L348 Elim1Store]: treesize reduction 17, result has 85.8 percent of original size [2020-12-22 04:19:05,632 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 121 [2020-12-22 04:19:05,634 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:05,634 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:05,637 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:05,686 INFO L625 ElimStorePlain]: treesize reduction 98, result has 26.3 percent of original size [2020-12-22 04:19:05,688 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 04:19:05,688 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:27 [2020-12-22 04:19:05,862 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:05,863 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:05,864 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:05,918 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:19:05,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:19:05,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 34 [2020-12-22 04:19:05,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439666425] [2020-12-22 04:19:05,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 04:19:05,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:19:05,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 04:19:05,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:19:05,920 INFO L87 Difference]: Start difference. First operand 386 states and 484 transitions. Second operand 34 states. [2020-12-22 04:19:11,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:19:11,354 INFO L93 Difference]: Finished difference Result 647 states and 795 transitions. [2020-12-22 04:19:11,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-12-22 04:19:11,355 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 49 [2020-12-22 04:19:11,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:19:11,358 INFO L225 Difference]: With dead ends: 647 [2020-12-22 04:19:11,358 INFO L226 Difference]: Without dead ends: 537 [2020-12-22 04:19:11,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4007 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1150, Invalid=10192, Unknown=0, NotChecked=0, Total=11342 [2020-12-22 04:19:11,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2020-12-22 04:19:11,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 362. [2020-12-22 04:19:11,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2020-12-22 04:19:11,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 438 transitions. [2020-12-22 04:19:11,425 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 438 transitions. Word has length 49 [2020-12-22 04:19:11,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:19:11,425 INFO L481 AbstractCegarLoop]: Abstraction has 362 states and 438 transitions. [2020-12-22 04:19:11,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 04:19:11,425 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 438 transitions. [2020-12-22 04:19:11,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 04:19:11,426 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:19:11,426 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:19:11,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:11,639 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:19:11,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:19:11,640 INFO L82 PathProgramCache]: Analyzing trace with hash 503230019, now seen corresponding path program 7 times [2020-12-22 04:19:11,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:19:11,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239022222] [2020-12-22 04:19:11,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:19:11,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:19:12,370 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:19:12,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239022222] [2020-12-22 04:19:12,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301144347] [2020-12-22 04:19:12,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:12,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:19:12,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 04:19:12,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:19:12,514 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-22 04:19:12,515 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:12,524 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:12,526 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:12,526 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2020-12-22 04:19:12,580 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:12,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:12,704 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 28 treesize of output 27 [2020-12-22 04:19:12,705 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:12,718 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:12,719 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:12,719 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2020-12-22 04:19:12,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:12,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:12,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:12,875 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:12,875 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2020-12-22 04:19:12,876 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:12,888 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:12,890 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:12,891 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:17 [2020-12-22 04:19:13,072 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:13,074 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:13,075 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:13,076 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:13,077 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:19:13,127 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 04:19:13,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:19:13,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2020-12-22 04:19:13,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552898208] [2020-12-22 04:19:13,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 04:19:13,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:19:13,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 04:19:13,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:19:13,129 INFO L87 Difference]: Start difference. First operand 362 states and 438 transitions. Second operand 28 states. [2020-12-22 04:19:15,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:19:15,055 INFO L93 Difference]: Finished difference Result 568 states and 700 transitions. [2020-12-22 04:19:15,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 04:19:15,057 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 51 [2020-12-22 04:19:15,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:19:15,059 INFO L225 Difference]: With dead ends: 568 [2020-12-22 04:19:15,059 INFO L226 Difference]: Without dead ends: 471 [2020-12-22 04:19:15,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=305, Invalid=1675, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:19:15,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2020-12-22 04:19:15,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 413. [2020-12-22 04:19:15,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2020-12-22 04:19:15,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 498 transitions. [2020-12-22 04:19:15,129 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 498 transitions. Word has length 51 [2020-12-22 04:19:15,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:19:15,130 INFO L481 AbstractCegarLoop]: Abstraction has 413 states and 498 transitions. [2020-12-22 04:19:15,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 04:19:15,130 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 498 transitions. [2020-12-22 04:19:15,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 04:19:15,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:19:15,131 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:19:15,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 04:19:15,346 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:19:15,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:19:15,346 INFO L82 PathProgramCache]: Analyzing trace with hash -663049668, now seen corresponding path program 3 times [2020-12-22 04:19:15,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:19:15,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827839049] [2020-12-22 04:19:15,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:19:15,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:19:16,073 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:19:16,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827839049] [2020-12-22 04:19:16,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492711080] [2020-12-22 04:19:16,074 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:16,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 04:19:16,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:19:16,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-22 04:19:16,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:19:16,478 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-22 04:19:16,479 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:16,488 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:16,489 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:16,490 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2020-12-22 04:19:16,588 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:16,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:16,736 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 28 treesize of output 27 [2020-12-22 04:19:16,738 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:16,748 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:16,749 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:16,749 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2020-12-22 04:19:16,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:16,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:16,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:16,962 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:16,962 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2020-12-22 04:19:16,963 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:16,975 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:16,977 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:16,977 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:28 [2020-12-22 04:19:17,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:17,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:17,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:17,199 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:17,199 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2020-12-22 04:19:17,201 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:17,211 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:17,212 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:17,213 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:19 [2020-12-22 04:19:17,497 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:17,499 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:17,500 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:17,564 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:19:17,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:19:17,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2020-12-22 04:19:17,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939851819] [2020-12-22 04:19:17,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 04:19:17,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:19:17,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 04:19:17,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:19:17,566 INFO L87 Difference]: Start difference. First operand 413 states and 498 transitions. Second operand 40 states. [2020-12-22 04:19:19,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:19:19,965 INFO L93 Difference]: Finished difference Result 656 states and 802 transitions. [2020-12-22 04:19:19,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 04:19:19,966 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 52 [2020-12-22 04:19:19,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:19:19,969 INFO L225 Difference]: With dead ends: 656 [2020-12-22 04:19:19,969 INFO L226 Difference]: Without dead ends: 578 [2020-12-22 04:19:19,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=387, Invalid=3153, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 04:19:19,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2020-12-22 04:19:20,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 439. [2020-12-22 04:19:20,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2020-12-22 04:19:20,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 533 transitions. [2020-12-22 04:19:20,063 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 533 transitions. Word has length 52 [2020-12-22 04:19:20,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:19:20,064 INFO L481 AbstractCegarLoop]: Abstraction has 439 states and 533 transitions. [2020-12-22 04:19:20,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 04:19:20,064 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 533 transitions. [2020-12-22 04:19:20,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 04:19:20,065 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:19:20,065 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:19:20,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 04:19:20,270 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:19:20,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:19:20,271 INFO L82 PathProgramCache]: Analyzing trace with hash -169981182, now seen corresponding path program 4 times [2020-12-22 04:19:20,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:19:20,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755099888] [2020-12-22 04:19:20,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:19:20,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:19:20,655 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:19:20,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755099888] [2020-12-22 04:19:20,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450059465] [2020-12-22 04:19:20,657 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:20,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:19:20,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:19:20,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 04:19:20,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:19:20,853 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-22 04:19:20,854 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:20,862 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:20,864 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:20,864 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:7 [2020-12-22 04:19:20,986 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:21,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:21,108 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 29 treesize of output 28 [2020-12-22 04:19:21,109 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:21,120 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:21,122 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:21,122 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2020-12-22 04:19:21,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:21,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:21,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:21,298 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:21,299 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2020-12-22 04:19:21,300 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:21,311 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:21,312 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:21,313 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:19 [2020-12-22 04:19:21,485 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:21,486 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:21,488 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:21,537 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 04:19:21,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:19:21,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2020-12-22 04:19:21,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256297111] [2020-12-22 04:19:21,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 04:19:21,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:19:21,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 04:19:21,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:19:21,538 INFO L87 Difference]: Start difference. First operand 439 states and 533 transitions. Second operand 34 states. [2020-12-22 04:19:24,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:19:24,287 INFO L93 Difference]: Finished difference Result 663 states and 814 transitions. [2020-12-22 04:19:24,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 04:19:24,289 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 52 [2020-12-22 04:19:24,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:19:24,291 INFO L225 Difference]: With dead ends: 663 [2020-12-22 04:19:24,291 INFO L226 Difference]: Without dead ends: 661 [2020-12-22 04:19:24,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=499, Invalid=3161, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 04:19:24,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2020-12-22 04:19:24,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 511. [2020-12-22 04:19:24,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-12-22 04:19:24,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 631 transitions. [2020-12-22 04:19:24,369 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 631 transitions. Word has length 52 [2020-12-22 04:19:24,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:19:24,369 INFO L481 AbstractCegarLoop]: Abstraction has 511 states and 631 transitions. [2020-12-22 04:19:24,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 04:19:24,369 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 631 transitions. [2020-12-22 04:19:24,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 04:19:24,370 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:19:24,371 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:19:24,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 04:19:24,585 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:19:24,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:19:24,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1569114548, now seen corresponding path program 2 times [2020-12-22 04:19:24,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:19:24,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102509997] [2020-12-22 04:19:24,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:19:24,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 04:19:24,632 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 04:19:24,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 04:19:24,681 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 04:19:24,709 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 04:19:24,710 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 04:19:24,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-12-22 04:19:24,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 04:19:24 BoogieIcfgContainer [2020-12-22 04:19:24,776 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 04:19:24,777 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 04:19:24,777 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 04:19:24,779 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 04:19:24,779 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:17:46" (3/4) ... [2020-12-22 04:19:24,782 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 04:19:24,890 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loops/insertion_sort-1.c-witness.graphml [2020-12-22 04:19:24,890 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 04:19:24,891 INFO L168 Benchmark]: Toolchain (without parser) took 99642.01 ms. Allocated memory was 174.1 MB in the beginning and 362.8 MB in the end (delta: 188.7 MB). Free memory was 148.9 MB in the beginning and 194.0 MB in the end (delta: -45.1 MB). Peak memory consumption was 144.9 MB. Max. memory is 8.0 GB. [2020-12-22 04:19:24,891 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 174.1 MB. Free memory was 145.4 MB in the beginning and 145.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 04:19:24,892 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.92 ms. Allocated memory is still 174.1 MB. Free memory was 148.7 MB in the beginning and 138.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-22 04:19:24,893 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.00 ms. Allocated memory is still 174.1 MB. Free memory was 138.6 MB in the beginning and 137.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 04:19:24,893 INFO L168 Benchmark]: Boogie Preprocessor took 29.14 ms. Allocated memory is still 174.1 MB. Free memory was 136.8 MB in the beginning and 135.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 04:19:24,894 INFO L168 Benchmark]: RCFGBuilder took 494.13 ms. Allocated memory is still 174.1 MB. Free memory was 135.6 MB in the beginning and 120.1 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-12-22 04:19:24,894 INFO L168 Benchmark]: TraceAbstraction took 98643.64 ms. Allocated memory was 174.1 MB in the beginning and 362.8 MB in the end (delta: 188.7 MB). Free memory was 119.8 MB in the beginning and 198.2 MB in the end (delta: -78.4 MB). Peak memory consumption was 111.4 MB. Max. memory is 8.0 GB. [2020-12-22 04:19:24,895 INFO L168 Benchmark]: Witness Printer took 113.36 ms. Allocated memory is still 362.8 MB. Free memory was 198.2 MB in the beginning and 194.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2020-12-22 04:19:24,899 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 174.1 MB. Free memory was 145.4 MB in the beginning and 145.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 306.92 ms. Allocated memory is still 174.1 MB. Free memory was 148.7 MB in the beginning and 138.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 44.00 ms. Allocated memory is still 174.1 MB. Free memory was 138.6 MB in the beginning and 137.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 29.14 ms. Allocated memory is still 174.1 MB. Free memory was 136.8 MB in the beginning and 135.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 494.13 ms. Allocated memory is still 174.1 MB. Free memory was 135.6 MB in the beginning and 120.1 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 98643.64 ms. Allocated memory was 174.1 MB in the beginning and 362.8 MB in the end (delta: 188.7 MB). Free memory was 119.8 MB in the beginning and 198.2 MB in the end (delta: -78.4 MB). Peak memory consumption was 111.4 MB. Max. memory is 8.0 GB. * Witness Printer took 113.36 ms. Allocated memory is still 362.8 MB. Free memory was 198.2 MB in the beginning and 194.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] unsigned int SIZE=__VERIFIER_nondet_uint(); [L15] int i, j, k, key; [L16] int v[SIZE]; [L17] j=0 [L17] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND TRUE (i>=0) && (v[i]>key) [L23] COND FALSE !(i<2) [L25] i = i - 1 [L22] (i>=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND TRUE (i>=0) && (v[i]>key) [L23] COND TRUE i<2 [L24] EXPR v[i] [L24] v[i+1] = v[i] [L25] i = i - 1 [L22] (i>=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND FALSE !(j