/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-tiling/rewnifrev2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:07:15,650 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:07:15,653 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:07:15,687 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:07:15,688 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:07:15,689 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:07:15,691 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:07:15,694 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:07:15,711 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:07:15,715 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:07:15,717 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:07:15,719 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 22:07:15,719 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 22:07:15,721 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 22:07:15,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 22:07:15,724 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 22:07:15,725 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 22:07:15,726 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 22:07:15,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 22:07:15,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 22:07:15,733 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 22:07:15,734 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 22:07:15,736 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 22:07:15,737 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 22:07:15,741 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 22:07:15,745 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-21 22:07:15,746 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-21 22:07:15,747 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-21 22:07:15,748 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-21 22:07:15,749 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-21 22:07:15,750 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-21 22:07:15,750 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-21 22:07:15,751 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-21 22:07:15,751 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:07:15,753 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:07:15,754 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:07:15,755 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:07:15,782 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:07:15,782 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:07:15,784 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:07:15,784 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:07:15,785 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:07:15,785 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:07:15,785 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:07:15,785 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:07:15,786 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:07:15,786 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:07:15,786 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:07:15,786 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:07:15,787 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:07:15,787 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:07:15,787 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:07:15,787 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:07:15,788 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:07:15,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:07:15,788 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:07:15,788 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:07:15,788 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:07:15,789 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:07:15,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:07:15,789 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:07:15,789 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:07:15,789 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:07:16,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:07:16,192 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:07:16,196 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:07:16,197 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:07:16,198 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:07:16,199 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/rewnifrev2.c [2020-12-21 22:07:16,297 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cca58dc35/d346eacacf7d4a108f1054634245dbd9/FLAG15df7d2e6 [2020-12-21 22:07:16,981 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:07:16,982 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rewnifrev2.c [2020-12-21 22:07:16,989 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cca58dc35/d346eacacf7d4a108f1054634245dbd9/FLAG15df7d2e6 [2020-12-21 22:07:17,354 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cca58dc35/d346eacacf7d4a108f1054634245dbd9 [2020-12-21 22:07:17,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:07:17,359 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:07:17,365 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:07:17,365 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:07:17,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:07:17,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:07:17" (1/1) ... [2020-12-21 22:07:17,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f97a1c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:17, skipping insertion in model container [2020-12-21 22:07:17,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:07:17" (1/1) ... [2020-12-21 22:07:17,386 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:07:17,405 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:07:17,561 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rewnifrev2.c[401,414] [2020-12-21 22:07:17,578 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:07:17,591 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:07:17,606 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rewnifrev2.c[401,414] [2020-12-21 22:07:17,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:07:17,635 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:07:17,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:17 WrapperNode [2020-12-21 22:07:17,636 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:07:17,637 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:07:17,638 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:07:17,638 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:07:17,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:17" (1/1) ... [2020-12-21 22:07:17,658 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:17" (1/1) ... [2020-12-21 22:07:17,682 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:07:17,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:07:17,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:07:17,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:07:17,693 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:17" (1/1) ... [2020-12-21 22:07:17,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:17" (1/1) ... [2020-12-21 22:07:17,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:17" (1/1) ... [2020-12-21 22:07:17,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:17" (1/1) ... [2020-12-21 22:07:17,702 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:17" (1/1) ... [2020-12-21 22:07:17,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:17" (1/1) ... [2020-12-21 22:07:17,709 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:17" (1/1) ... [2020-12-21 22:07:17,711 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:07:17,715 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:07:17,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:07:17,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:07:17,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:07:17,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:07:17,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:07:17,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:07:17,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-21 22:07:17,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:07:17,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:07:17,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:07:18,149 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:07:18,150 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-21 22:07:18,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:07:18 BoogieIcfgContainer [2020-12-21 22:07:18,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:07:18,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:07:18,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:07:18,158 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:07:18,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:07:17" (1/3) ... [2020-12-21 22:07:18,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bf1bcba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:07:18, skipping insertion in model container [2020-12-21 22:07:18,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:17" (2/3) ... [2020-12-21 22:07:18,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bf1bcba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:07:18, skipping insertion in model container [2020-12-21 22:07:18,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:07:18" (3/3) ... [2020-12-21 22:07:18,162 INFO L111 eAbstractionObserver]: Analyzing ICFG rewnifrev2.c [2020-12-21 22:07:18,170 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:07:18,176 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:07:18,205 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:07:18,240 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:07:18,240 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:07:18,240 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:07:18,241 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:07:18,241 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:07:18,241 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:07:18,241 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:07:18,241 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:07:18,294 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-21 22:07:18,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-21 22:07:18,301 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:07:18,302 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:07:18,303 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:07:18,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:07:18,310 INFO L82 PathProgramCache]: Analyzing trace with hash 126991449, now seen corresponding path program 1 times [2020-12-21 22:07:18,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:07:18,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963405539] [2020-12-21 22:07:18,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:07:18,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:07:18,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:07:18,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963405539] [2020-12-21 22:07:18,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:07:18,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:07:18,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018669260] [2020-12-21 22:07:18,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:07:18,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:07:18,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:07:18,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:07:18,532 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2020-12-21 22:07:18,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:07:18,551 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2020-12-21 22:07:18,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:07:18,553 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-21 22:07:18,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:07:18,564 INFO L225 Difference]: With dead ends: 27 [2020-12-21 22:07:18,564 INFO L226 Difference]: Without dead ends: 12 [2020-12-21 22:07:18,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:07:18,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-21 22:07:18,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-21 22:07:18,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-21 22:07:18,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-12-21 22:07:18,607 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2020-12-21 22:07:18,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:07:18,608 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-12-21 22:07:18,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:07:18,608 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-12-21 22:07:18,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-21 22:07:18,609 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:07:18,609 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:07:18,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 22:07:18,610 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:07:18,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:07:18,611 INFO L82 PathProgramCache]: Analyzing trace with hash 121450323, now seen corresponding path program 1 times [2020-12-21 22:07:18,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:07:18,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417387602] [2020-12-21 22:07:18,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:07:18,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:07:18,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:07:18,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417387602] [2020-12-21 22:07:18,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:07:18,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:07:18,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856891923] [2020-12-21 22:07:18,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 22:07:18,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:07:18,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 22:07:18,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:07:18,746 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2020-12-21 22:07:18,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:07:18,827 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-12-21 22:07:18,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 22:07:18,830 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-21 22:07:18,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:07:18,832 INFO L225 Difference]: With dead ends: 20 [2020-12-21 22:07:18,832 INFO L226 Difference]: Without dead ends: 13 [2020-12-21 22:07:18,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:07:18,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-21 22:07:18,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-21 22:07:18,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-21 22:07:18,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-12-21 22:07:18,844 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2020-12-21 22:07:18,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:07:18,845 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-12-21 22:07:18,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 22:07:18,847 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-12-21 22:07:18,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-21 22:07:18,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:07:18,848 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:07:18,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 22:07:18,849 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:07:18,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:07:18,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1899941007, now seen corresponding path program 1 times [2020-12-21 22:07:18,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:07:18,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387069397] [2020-12-21 22:07:18,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:07:18,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:07:19,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:07:19,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387069397] [2020-12-21 22:07:19,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:07:19,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-21 22:07:19,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101109009] [2020-12-21 22:07:19,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:07:19,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:07:19,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:07:19,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:07:19,192 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2020-12-21 22:07:19,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:07:19,317 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-12-21 22:07:19,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:07:19,317 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-12-21 22:07:19,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:07:19,318 INFO L225 Difference]: With dead ends: 19 [2020-12-21 22:07:19,318 INFO L226 Difference]: Without dead ends: 17 [2020-12-21 22:07:19,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:07:19,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-21 22:07:19,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2020-12-21 22:07:19,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-21 22:07:19,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-21 22:07:19,325 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-12-21 22:07:19,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:07:19,325 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-21 22:07:19,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:07:19,326 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-21 22:07:19,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 22:07:19,326 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:07:19,327 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:07:19,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-21 22:07:19,327 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:07:19,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:07:19,328 INFO L82 PathProgramCache]: Analyzing trace with hash 604563239, now seen corresponding path program 1 times [2020-12-21 22:07:19,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:07:19,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646950265] [2020-12-21 22:07:19,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:07:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:07:19,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:07:19,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646950265] [2020-12-21 22:07:19,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588624307] [2020-12-21 22:07:19,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:07:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:07:19,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-21 22:07:19,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:07:19,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:07:19,711 INFO L348 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2020-12-21 22:07:19,712 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2020-12-21 22:07:19,718 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:07:19,728 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:07:19,733 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:07:19,734 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:29 [2020-12-21 22:07:20,300 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:07:20,314 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:07:20,324 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-21 22:07:20,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:07:20,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:07:20,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2020-12-21 22:07:20,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618267495] [2020-12-21 22:07:20,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 22:07:20,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:07:20,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 22:07:20,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-12-21 22:07:20,355 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 15 states. [2020-12-21 22:07:20,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:07:20,726 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-12-21 22:07:20,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 22:07:20,726 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2020-12-21 22:07:20,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:07:20,727 INFO L225 Difference]: With dead ends: 24 [2020-12-21 22:07:20,728 INFO L226 Difference]: Without dead ends: 22 [2020-12-21 22:07:20,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2020-12-21 22:07:20,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-21 22:07:20,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2020-12-21 22:07:20,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-21 22:07:20,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-12-21 22:07:20,734 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2020-12-21 22:07:20,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:07:20,735 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-12-21 22:07:20,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 22:07:20,735 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-12-21 22:07:20,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-21 22:07:20,736 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:07:20,736 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:07:20,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:07:20,946 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:07:20,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:07:20,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1572614179, now seen corresponding path program 2 times [2020-12-21 22:07:20,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:07:20,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047728651] [2020-12-21 22:07:20,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:07:20,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:07:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:07:21,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047728651] [2020-12-21 22:07:21,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336942863] [2020-12-21 22:07:21,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:07:21,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:07:21,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:07:21,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:07:21,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:07:21,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:07:21,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:07:21,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-12-21 22:07:21,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065143690] [2020-12-21 22:07:21,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:07:21,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:07:21,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:07:21,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:07:21,235 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 11 states. [2020-12-21 22:07:21,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:07:21,301 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-12-21 22:07:21,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:07:21,302 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2020-12-21 22:07:21,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:07:21,303 INFO L225 Difference]: With dead ends: 38 [2020-12-21 22:07:21,303 INFO L226 Difference]: Without dead ends: 22 [2020-12-21 22:07:21,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:07:21,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-21 22:07:21,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-12-21 22:07:21,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-21 22:07:21,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-12-21 22:07:21,317 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-12-21 22:07:21,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:07:21,317 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-12-21 22:07:21,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 22:07:21,317 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-12-21 22:07:21,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-21 22:07:21,319 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:07:21,319 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:07:21,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:07:21,534 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:07:21,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:07:21,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1704999301, now seen corresponding path program 3 times [2020-12-21 22:07:21,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:07:21,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303760414] [2020-12-21 22:07:21,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:07:21,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:07:21,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:07:21,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303760414] [2020-12-21 22:07:21,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035083070] [2020-12-21 22:07:21,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:07:21,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 22:07:21,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:07:21,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-21 22:07:21,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:07:21,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:07:21,844 INFO L348 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2020-12-21 22:07:21,845 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2020-12-21 22:07:21,847 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:07:21,856 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:07:21,857 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:07:21,857 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:31 [2020-12-21 22:07:21,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:07:22,059 INFO L348 Elim1Store]: treesize reduction 132, result has 51.6 percent of original size [2020-12-21 22:07:22,059 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 4 case distinctions, treesize of input 51 treesize of output 163 [2020-12-21 22:07:22,068 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:07:22,118 INFO L625 ElimStorePlain]: treesize reduction 81, result has 43.0 percent of original size [2020-12-21 22:07:22,125 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-21 22:07:22,125 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:61, output treesize:61 [2020-12-21 22:07:22,724 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:07:22,727 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:07:22,732 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-21 22:07:22,739 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:07:22,744 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-21 22:07:22,747 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-21 22:07:22,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:07:22,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:07:22,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2020-12-21 22:07:22,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511895224] [2020-12-21 22:07:22,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-21 22:07:22,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:07:22,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-21 22:07:22,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-12-21 22:07:22,792 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 22 states. [2020-12-21 22:07:24,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:07:24,574 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-12-21 22:07:24,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-21 22:07:24,575 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 20 [2020-12-21 22:07:24,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:07:24,576 INFO L225 Difference]: With dead ends: 47 [2020-12-21 22:07:24,576 INFO L226 Difference]: Without dead ends: 31 [2020-12-21 22:07:24,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=461, Invalid=1609, Unknown=0, NotChecked=0, Total=2070 [2020-12-21 22:07:24,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-21 22:07:24,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-12-21 22:07:24,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-21 22:07:24,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-12-21 22:07:24,585 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 20 [2020-12-21 22:07:24,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:07:24,585 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-12-21 22:07:24,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-21 22:07:24,586 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-12-21 22:07:24,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-21 22:07:24,586 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:07:24,587 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:07:24,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:07:24,802 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:07:24,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:07:24,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1670835535, now seen corresponding path program 4 times [2020-12-21 22:07:24,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:07:24,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197137326] [2020-12-21 22:07:24,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:07:24,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:07:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:07:25,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197137326] [2020-12-21 22:07:25,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006767493] [2020-12-21 22:07:25,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:07:25,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:07:25,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:07:25,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-21 22:07:25,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:07:25,302 INFO L348 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2020-12-21 22:07:25,302 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 1 case distinctions, treesize of input 25 treesize of output 26 [2020-12-21 22:07:25,304 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:07:25,310 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:07:25,311 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:07:25,311 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:26 [2020-12-21 22:07:25,404 INFO L348 Elim1Store]: treesize reduction 152, result has 13.6 percent of original size [2020-12-21 22:07:25,405 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 54 treesize of output 48 [2020-12-21 22:07:25,409 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:07:25,422 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:07:25,423 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:07:25,423 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:40 [2020-12-21 22:07:25,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:07:25,566 INFO L348 Elim1Store]: treesize reduction 282, result has 11.3 percent of original size [2020-12-21 22:07:25,567 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 65 [2020-12-21 22:07:25,570 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:07:25,583 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:07:25,584 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:07:25,584 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:71, output treesize:57 [2020-12-21 22:07:26,153 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:07:26,156 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-21 22:07:26,162 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-21 22:07:26,166 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-21 22:07:26,209 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:07:26,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:07:26,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2020-12-21 22:07:26,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619196967] [2020-12-21 22:07:26,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-21 22:07:26,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:07:26,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-21 22:07:26,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2020-12-21 22:07:26,212 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 27 states. [2020-12-21 22:07:27,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:07:27,831 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-12-21 22:07:27,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 22:07:27,832 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 26 [2020-12-21 22:07:27,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:07:27,832 INFO L225 Difference]: With dead ends: 36 [2020-12-21 22:07:27,833 INFO L226 Difference]: Without dead ends: 34 [2020-12-21 22:07:27,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=365, Invalid=1357, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 22:07:27,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-21 22:07:27,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-12-21 22:07:27,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-21 22:07:27,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-12-21 22:07:27,842 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 26 [2020-12-21 22:07:27,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:07:27,843 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-12-21 22:07:27,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-21 22:07:27,843 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-12-21 22:07:27,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-21 22:07:27,844 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:07:27,844 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:07:28,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:07:28,058 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:07:28,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:07:28,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1047363067, now seen corresponding path program 5 times [2020-12-21 22:07:28,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:07:28,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888713570] [2020-12-21 22:07:28,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:07:28,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:07:28,156 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 19 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:07:28,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888713570] [2020-12-21 22:07:28,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231025868] [2020-12-21 22:07:28,157 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:07:28,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-21 22:07:28,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:07:28,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 22:07:28,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:07:28,378 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 32 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:07:28,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:07:28,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-12-21 22:07:28,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284586368] [2020-12-21 22:07:28,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 22:07:28,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:07:28,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 22:07:28,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2020-12-21 22:07:28,381 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 15 states. [2020-12-21 22:07:28,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:07:28,512 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-12-21 22:07:28,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 22:07:28,516 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-12-21 22:07:28,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:07:28,517 INFO L225 Difference]: With dead ends: 58 [2020-12-21 22:07:28,517 INFO L226 Difference]: Without dead ends: 34 [2020-12-21 22:07:28,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:07:28,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-21 22:07:28,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-12-21 22:07:28,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-21 22:07:28,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-12-21 22:07:28,532 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-12-21 22:07:28,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:07:28,532 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-12-21 22:07:28,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 22:07:28,532 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-12-21 22:07:28,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-21 22:07:28,533 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:07:28,533 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:07:28,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:07:28,748 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:07:28,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:07:28,749 INFO L82 PathProgramCache]: Analyzing trace with hash -2041873501, now seen corresponding path program 6 times [2020-12-21 22:07:28,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:07:28,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997620955] [2020-12-21 22:07:28,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:07:28,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:07:29,080 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:07:29,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997620955] [2020-12-21 22:07:29,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282487656] [2020-12-21 22:07:29,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:07:29,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-21 22:07:29,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:07:29,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-21 22:07:29,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:07:29,199 INFO L348 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2020-12-21 22:07:29,199 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 1 case distinctions, treesize of input 25 treesize of output 26 [2020-12-21 22:07:29,200 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:07:29,206 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:07:29,207 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:07:29,207 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:26 [2020-12-21 22:07:29,302 INFO L348 Elim1Store]: treesize reduction 152, result has 13.6 percent of original size [2020-12-21 22:07:29,303 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 54 treesize of output 48 [2020-12-21 22:07:29,311 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:07:29,320 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:07:29,320 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:07:29,321 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:40 [2020-12-21 22:07:29,471 INFO L348 Elim1Store]: treesize reduction 282, result has 11.3 percent of original size [2020-12-21 22:07:29,471 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 68 treesize of output 65 [2020-12-21 22:07:29,478 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:07:29,490 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:07:29,491 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:07:29,491 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:54 [2020-12-21 22:07:29,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:07:29,693 INFO L348 Elim1Store]: treesize reduction 430, result has 10.0 percent of original size [2020-12-21 22:07:29,693 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 82 [2020-12-21 22:07:29,696 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:07:29,712 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:07:29,713 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:07:29,714 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:85, output treesize:71 [2020-12-21 22:07:30,506 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:07:30,510 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-21 22:07:30,516 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-21 22:07:30,519 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-21 22:07:30,578 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:07:30,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:07:30,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 29 [2020-12-21 22:07:30,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821139211] [2020-12-21 22:07:30,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-21 22:07:30,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:07:30,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-21 22:07:30,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2020-12-21 22:07:30,589 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 29 states. [2020-12-21 22:07:31,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:07:31,565 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2020-12-21 22:07:31,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-21 22:07:31,566 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-12-21 22:07:31,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:07:31,567 INFO L225 Difference]: With dead ends: 42 [2020-12-21 22:07:31,567 INFO L226 Difference]: Without dead ends: 40 [2020-12-21 22:07:31,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=436, Invalid=1286, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 22:07:31,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-21 22:07:31,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-12-21 22:07:31,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-21 22:07:31,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-12-21 22:07:31,577 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2020-12-21 22:07:31,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:07:31,578 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-12-21 22:07:31,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-21 22:07:31,578 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-12-21 22:07:31,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-21 22:07:31,579 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:07:31,579 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:07:31,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:07:31,794 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:07:31,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:07:31,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1072678489, now seen corresponding path program 7 times [2020-12-21 22:07:31,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:07:31,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768488274] [2020-12-21 22:07:31,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:07:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:07:31,928 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 33 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:07:31,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768488274] [2020-12-21 22:07:31,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397634235] [2020-12-21 22:07:31,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:07:31,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:07:31,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 22:07:31,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:07:32,136 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 50 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:07:32,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:07:32,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-12-21 22:07:32,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597096324] [2020-12-21 22:07:32,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 22:07:32,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:07:32,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 22:07:32,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=168, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:07:32,139 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 17 states. [2020-12-21 22:07:32,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:07:32,306 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-12-21 22:07:32,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 22:07:32,306 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 36 [2020-12-21 22:07:32,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:07:32,307 INFO L225 Difference]: With dead ends: 68 [2020-12-21 22:07:32,308 INFO L226 Difference]: Without dead ends: 40 [2020-12-21 22:07:32,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2020-12-21 22:07:32,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-21 22:07:32,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-12-21 22:07:32,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-21 22:07:32,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-12-21 22:07:32,321 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-12-21 22:07:32,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:07:32,321 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-12-21 22:07:32,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 22:07:32,322 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-12-21 22:07:32,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-21 22:07:32,323 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:07:32,323 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:07:32,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-21 22:07:32,537 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:07:32,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:07:32,538 INFO L82 PathProgramCache]: Analyzing trace with hash 811766135, now seen corresponding path program 8 times [2020-12-21 22:07:32,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:07:32,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183282914] [2020-12-21 22:07:32,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:07:32,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:07:33,244 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 5 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:07:33,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183282914] [2020-12-21 22:07:33,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114180540] [2020-12-21 22:07:33,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:07:33,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:07:33,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:07:33,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-21 22:07:33,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:07:33,332 INFO L348 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2020-12-21 22:07:33,333 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 1 case distinctions, treesize of input 25 treesize of output 26 [2020-12-21 22:07:33,337 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:07:33,343 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:07:33,344 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:07:33,344 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:26 [2020-12-21 22:07:33,428 INFO L348 Elim1Store]: treesize reduction 152, result has 13.6 percent of original size [2020-12-21 22:07:33,429 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 54 treesize of output 48 [2020-12-21 22:07:33,431 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:07:33,439 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:07:33,440 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:07:33,440 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:40 [2020-12-21 22:07:33,574 INFO L348 Elim1Store]: treesize reduction 282, result has 11.3 percent of original size [2020-12-21 22:07:33,575 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 68 treesize of output 65 [2020-12-21 22:07:33,583 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:07:33,594 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:07:33,595 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:07:33,595 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:54 [2020-12-21 22:07:33,785 INFO L348 Elim1Store]: treesize reduction 430, result has 10.0 percent of original size [2020-12-21 22:07:33,785 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 82 treesize of output 82 [2020-12-21 22:07:33,789 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:07:33,802 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:07:33,803 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:07:33,804 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:82, output treesize:68 [2020-12-21 22:07:33,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:07:34,051 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 31 [2020-12-21 22:07:34,052 INFO L348 Elim1Store]: treesize reduction 596, result has 9.1 percent of original size [2020-12-21 22:07:34,053 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 96 treesize of output 99 [2020-12-21 22:07:34,058 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:07:34,079 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:07:34,080 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:07:34,080 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:99, output treesize:85 [2020-12-21 22:07:35,117 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:07:35,120 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-21 22:07:35,127 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-21 22:07:35,130 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-21 22:07:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 21 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:07:35,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:07:35,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2020-12-21 22:07:35,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833559375] [2020-12-21 22:07:35,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-21 22:07:35,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:07:35,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-21 22:07:35,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 22:07:35,215 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 37 states. [2020-12-21 22:07:36,393 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2020-12-21 22:07:38,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:07:38,014 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2020-12-21 22:07:38,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-21 22:07:38,019 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 38 [2020-12-21 22:07:38,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:07:38,020 INFO L225 Difference]: With dead ends: 48 [2020-12-21 22:07:38,020 INFO L226 Difference]: Without dead ends: 46 [2020-12-21 22:07:38,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=654, Invalid=2652, Unknown=0, NotChecked=0, Total=3306 [2020-12-21 22:07:38,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-21 22:07:38,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-12-21 22:07:38,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-21 22:07:38,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-12-21 22:07:38,042 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 38 [2020-12-21 22:07:38,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:07:38,042 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-12-21 22:07:38,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-21 22:07:38,043 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-12-21 22:07:38,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-21 22:07:38,043 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:07:38,044 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:07:38,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-21 22:07:38,250 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:07:38,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:07:38,251 INFO L82 PathProgramCache]: Analyzing trace with hash 975163949, now seen corresponding path program 9 times [2020-12-21 22:07:38,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:07:38,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398813172] [2020-12-21 22:07:38,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:07:38,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:07:38,372 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 51 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:07:38,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398813172] [2020-12-21 22:07:38,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088421152] [2020-12-21 22:07:38,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:07:38,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-21 22:07:38,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:07:38,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 22:07:38,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:07:38,767 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 72 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:07:38,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:07:38,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-12-21 22:07:38,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641160832] [2020-12-21 22:07:38,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-21 22:07:38,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:07:38,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-21 22:07:38,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=212, Unknown=0, NotChecked=0, Total=342 [2020-12-21 22:07:38,769 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 19 states. [2020-12-21 22:07:38,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:07:38,932 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-12-21 22:07:38,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 22:07:38,934 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-12-21 22:07:38,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:07:38,935 INFO L225 Difference]: With dead ends: 78 [2020-12-21 22:07:38,935 INFO L226 Difference]: Without dead ends: 46 [2020-12-21 22:07:38,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-12-21 22:07:38,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-21 22:07:38,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-12-21 22:07:38,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-21 22:07:38,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-12-21 22:07:38,946 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2020-12-21 22:07:38,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:07:38,947 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-12-21 22:07:38,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-21 22:07:38,947 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-12-21 22:07:38,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-21 22:07:38,948 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:07:38,948 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:07:39,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:07:39,162 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:07:39,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:07:39,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1359564491, now seen corresponding path program 10 times [2020-12-21 22:07:39,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:07:39,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571637578] [2020-12-21 22:07:39,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:07:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:07:39,650 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 6 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:07:39,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571637578] [2020-12-21 22:07:39,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340564071] [2020-12-21 22:07:39,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:07:39,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:07:39,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:07:39,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-21 22:07:39,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:07:39,741 INFO L348 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2020-12-21 22:07:39,741 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 1 case distinctions, treesize of input 25 treesize of output 26 [2020-12-21 22:07:39,743 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:07:39,748 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:07:39,749 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:07:39,750 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:26 [2020-12-21 22:07:39,863 INFO L348 Elim1Store]: treesize reduction 152, result has 13.6 percent of original size [2020-12-21 22:07:39,864 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 54 treesize of output 48 [2020-12-21 22:07:39,866 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:07:39,874 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:07:39,876 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:07:39,876 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:40 [2020-12-21 22:07:40,030 INFO L348 Elim1Store]: treesize reduction 282, result has 11.3 percent of original size [2020-12-21 22:07:40,031 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 68 treesize of output 65 [2020-12-21 22:07:40,033 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:07:40,046 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:07:40,047 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:07:40,047 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:54 [2020-12-21 22:07:40,248 INFO L348 Elim1Store]: treesize reduction 430, result has 10.0 percent of original size [2020-12-21 22:07:40,249 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 82 treesize of output 82 [2020-12-21 22:07:40,253 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:07:40,267 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:07:40,268 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:07:40,269 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:82, output treesize:68 [2020-12-21 22:07:40,565 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 31 [2020-12-21 22:07:40,566 INFO L348 Elim1Store]: treesize reduction 596, result has 9.1 percent of original size [2020-12-21 22:07:40,567 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 96 treesize of output 99 [2020-12-21 22:07:40,574 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:07:40,590 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:07:40,591 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:07:40,592 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:96, output treesize:82 [2020-12-21 22:07:40,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:07:40,951 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 36 [2020-12-21 22:07:40,952 INFO L348 Elim1Store]: treesize reduction 780, result has 8.5 percent of original size [2020-12-21 22:07:40,952 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 110 treesize of output 116 [2020-12-21 22:07:40,957 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:07:40,984 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:07:40,985 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:07:40,985 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:113, output treesize:99 [2020-12-21 22:07:42,408 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:07:42,412 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-21 22:07:42,419 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-21 22:07:42,423 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2020-12-21 22:07:42,536 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 31 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:07:42,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:07:42,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24] total 37 [2020-12-21 22:07:42,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864925532] [2020-12-21 22:07:42,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-21 22:07:42,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:07:42,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-21 22:07:42,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1019, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 22:07:42,539 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 37 states. [2020-12-21 22:07:44,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:07:44,659 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2020-12-21 22:07:44,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-21 22:07:44,659 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 44 [2020-12-21 22:07:44,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:07:44,660 INFO L225 Difference]: With dead ends: 54 [2020-12-21 22:07:44,661 INFO L226 Difference]: Without dead ends: 52 [2020-12-21 22:07:44,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 8 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=678, Invalid=2184, Unknown=0, NotChecked=0, Total=2862 [2020-12-21 22:07:44,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-21 22:07:44,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2020-12-21 22:07:44,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-21 22:07:44,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-12-21 22:07:44,675 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2020-12-21 22:07:44,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:07:44,675 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-12-21 22:07:44,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-21 22:07:44,676 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-12-21 22:07:44,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-21 22:07:44,677 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:07:44,677 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:07:44,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:07:44,884 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:07:44,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:07:44,885 INFO L82 PathProgramCache]: Analyzing trace with hash 62899585, now seen corresponding path program 11 times [2020-12-21 22:07:44,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:07:44,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721219586] [2020-12-21 22:07:44,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:07:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:07:45,013 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 73 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:07:45,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721219586] [2020-12-21 22:07:45,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964779314] [2020-12-21 22:07:45,014 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:07:45,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-21 22:07:45,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:07:45,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 22:07:45,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:07:45,414 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 98 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:07:45,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:07:45,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-12-21 22:07:45,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645341528] [2020-12-21 22:07:45,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-21 22:07:45,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:07:45,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-21 22:07:45,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-12-21 22:07:45,416 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 21 states. [2020-12-21 22:07:45,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:07:45,620 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-12-21 22:07:45,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 22:07:45,621 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-12-21 22:07:45,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:07:45,622 INFO L225 Difference]: With dead ends: 88 [2020-12-21 22:07:45,622 INFO L226 Difference]: Without dead ends: 52 [2020-12-21 22:07:45,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2020-12-21 22:07:45,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-21 22:07:45,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-12-21 22:07:45,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-21 22:07:45,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-12-21 22:07:45,641 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-12-21 22:07:45,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:07:45,643 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-12-21 22:07:45,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-21 22:07:45,643 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-12-21 22:07:45,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-21 22:07:45,644 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:07:45,644 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:07:45,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 22:07:45,853 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:07:45,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:07:45,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1296772193, now seen corresponding path program 12 times [2020-12-21 22:07:45,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:07:45,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856548947] [2020-12-21 22:07:45,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:07:45,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:07:46,473 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 7 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:07:46,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856548947] [2020-12-21 22:07:46,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665275550] [2020-12-21 22:07:46,474 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:07:46,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-21 22:07:46,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:07:46,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-21 22:07:46,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:07:46,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:07:46,714 INFO L348 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2020-12-21 22:07:46,715 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2020-12-21 22:07:46,716 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:07:46,725 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:07:46,726 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:07:46,726 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:31 [2020-12-21 22:07:46,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:07:46,973 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2020-12-21 22:07:46,974 INFO L348 Elim1Store]: treesize reduction 132, result has 51.6 percent of original size [2020-12-21 22:07:46,974 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 4 case distinctions, treesize of input 51 treesize of output 163 [2020-12-21 22:07:46,978 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:07:47,043 INFO L625 ElimStorePlain]: treesize reduction 81, result has 43.0 percent of original size [2020-12-21 22:07:47,045 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-21 22:07:47,045 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:61, output treesize:61 [2020-12-21 22:07:47,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:07:47,596 WARN L197 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 74 [2020-12-21 22:07:47,597 INFO L348 Elim1Store]: treesize reduction 224, result has 60.1 percent of original size [2020-12-21 22:07:47,598 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 76 treesize of output 368 [2020-12-21 22:07:47,609 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:07:47,743 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2020-12-21 22:07:47,744 INFO L625 ElimStorePlain]: treesize reduction 206, result has 30.6 percent of original size [2020-12-21 22:07:47,749 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. [2020-12-21 22:07:47,749 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:91, output treesize:91 [2020-12-21 22:07:47,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:07:48,849 WARN L197 SmtUtils]: Spent 849.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 128 [2020-12-21 22:07:48,850 INFO L348 Elim1Store]: treesize reduction 316, result has 65.6 percent of original size [2020-12-21 22:07:48,851 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 22 case distinctions, treesize of input 101 treesize of output 641 [2020-12-21 22:07:48,865 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:07:49,124 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 50 [2020-12-21 22:07:49,125 INFO L625 ElimStorePlain]: treesize reduction 375, result has 24.4 percent of original size [2020-12-21 22:07:49,130 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-21 22:07:49,131 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:121, output treesize:121 [2020-12-21 22:07:49,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:07:51,111 WARN L197 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 243 DAG size of output: 198 [2020-12-21 22:07:51,112 INFO L348 Elim1Store]: treesize reduction 408, result has 69.6 percent of original size [2020-12-21 22:07:51,112 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 37 case distinctions, treesize of input 126 treesize of output 982 [2020-12-21 22:07:51,133 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:07:51,547 WARN L197 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 60 [2020-12-21 22:07:51,548 INFO L625 ElimStorePlain]: treesize reduction 588, result has 20.4 percent of original size [2020-12-21 22:07:51,553 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-21 22:07:51,554 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:151, output treesize:151 [2020-12-21 22:07:52,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:07:55,907 WARN L197 SmtUtils]: Spent 3.24 s on a formula simplification. DAG size of input: 339 DAG size of output: 284 [2020-12-21 22:07:55,909 INFO L348 Elim1Store]: treesize reduction 500, result has 72.8 percent of original size [2020-12-21 22:07:55,910 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 56 case distinctions, treesize of input 151 treesize of output 1391 [2020-12-21 22:07:55,944 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:07:56,606 WARN L197 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 70 [2020-12-21 22:07:56,607 INFO L625 ElimStorePlain]: treesize reduction 845, result has 17.6 percent of original size [2020-12-21 22:07:56,614 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-12-21 22:07:56,614 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:181, output treesize:181 [2020-12-21 22:08:08,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:08:14,269 WARN L197 SmtUtils]: Spent 6.14 s on a formula simplification. DAG size of input: 451 DAG size of output: 386 [2020-12-21 22:08:14,272 INFO L348 Elim1Store]: treesize reduction 592, result has 75.3 percent of original size [2020-12-21 22:08:14,273 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 79 case distinctions, treesize of input 176 treesize of output 1868 [2020-12-21 22:08:14,332 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:08:15,381 WARN L197 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 333 DAG size of output: 80 [2020-12-21 22:08:15,382 INFO L625 ElimStorePlain]: treesize reduction 1146, result has 15.5 percent of original size [2020-12-21 22:08:15,391 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2020-12-21 22:08:15,392 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:211, output treesize:211 [2020-12-21 22:08:58,968 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-12-21 22:09:30,355 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 82