/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loops/insertion_sort-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:18:47,698 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:18:47,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:18:47,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:18:47,767 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:18:47,772 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:18:47,777 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:18:47,787 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:18:47,791 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:18:47,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:18:47,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:18:47,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:18:47,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:18:47,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:18:47,807 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:18:47,810 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:18:47,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:18:47,815 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:18:47,825 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:18:47,835 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:18:47,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:18:47,840 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:18:47,842 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:18:47,846 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:18:47,856 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 04:18:47,857 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 04:18:47,857 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 04:18:47,860 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 04:18:47,861 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 04:18:47,862 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 04:18:47,862 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 04:18:47,863 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 04:18:47,866 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 04:18:47,867 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 04:18:47,868 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 04:18:47,868 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 04:18:47,869 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 04:18:47,869 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 04:18:47,870 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:18:47,871 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:18:47,872 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:18:47,873 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:18:47,934 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:18:47,935 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:18:47,939 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:18:47,939 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:18:47,940 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:18:47,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:18:47,940 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:18:47,940 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:18:47,941 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:18:47,941 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:18:47,942 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:18:47,943 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:18:47,943 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:18:47,943 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:18:47,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:18:47,944 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:18:47,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:18:47,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:18:47,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:18:47,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:18:47,946 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:18:47,946 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:18:47,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:18:47,947 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:18:47,947 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:18:47,947 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:18:48,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:18:48,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:18:48,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:18:48,440 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:18:48,441 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:18:48,442 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/insertion_sort-2.c [2020-12-22 04:18:48,532 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c8d4a4d9/96e5e46e86ce43188e2d72a5f47fca6c/FLAGea08e3292 [2020-12-22 04:18:49,126 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:18:49,127 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/insertion_sort-2.c [2020-12-22 04:18:49,134 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c8d4a4d9/96e5e46e86ce43188e2d72a5f47fca6c/FLAGea08e3292 [2020-12-22 04:18:49,481 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c8d4a4d9/96e5e46e86ce43188e2d72a5f47fca6c [2020-12-22 04:18:49,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:18:49,487 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:18:49,488 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:18:49,489 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:18:49,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:18:49,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:18:49" (1/1) ... [2020-12-22 04:18:49,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5252da62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:18:49, skipping insertion in model container [2020-12-22 04:18:49,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:18:49" (1/1) ... [2020-12-22 04:18:49,504 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:18:49,520 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:18:49,673 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/insertion_sort-2.c[328,341] [2020-12-22 04:18:49,694 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:18:49,705 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:18:49,721 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/insertion_sort-2.c[328,341] [2020-12-22 04:18:49,732 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:18:49,759 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:18:49,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:18:49 WrapperNode [2020-12-22 04:18:49,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:18:49,762 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:18:49,762 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:18:49,762 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:18:49,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:18:49" (1/1) ... [2020-12-22 04:18:49,782 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:18:49" (1/1) ... [2020-12-22 04:18:49,807 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:18:49,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:18:49,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:18:49,809 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:18:49,817 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:18:49" (1/1) ... [2020-12-22 04:18:49,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:18:49" (1/1) ... [2020-12-22 04:18:49,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:18:49" (1/1) ... [2020-12-22 04:18:49,821 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:18:49" (1/1) ... [2020-12-22 04:18:49,827 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:18:49" (1/1) ... [2020-12-22 04:18:49,832 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:18:49" (1/1) ... [2020-12-22 04:18:49,834 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:18:49" (1/1) ... [2020-12-22 04:18:49,837 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:18:49,838 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:18:49,838 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:18:49,839 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:18:49,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:18:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:18:49,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:18:49,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:18:49,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 04:18:49,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:18:49,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:18:49,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 04:18:49,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 04:18:50,268 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:18:50,268 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-22 04:18:50,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:18:50 BoogieIcfgContainer [2020-12-22 04:18:50,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:18:50,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:18:50,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:18:50,287 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:18:50,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:18:49" (1/3) ... [2020-12-22 04:18:50,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22cac508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:18:50, skipping insertion in model container [2020-12-22 04:18:50,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:18:49" (2/3) ... [2020-12-22 04:18:50,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22cac508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:18:50, skipping insertion in model container [2020-12-22 04:18:50,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:18:50" (3/3) ... [2020-12-22 04:18:50,300 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-2.c [2020-12-22 04:18:50,313 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:18:50,330 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:18:50,392 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:18:50,478 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:18:50,479 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:18:50,479 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:18:50,479 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:18:50,479 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:18:50,479 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:18:50,479 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:18:50,480 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:18:50,509 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-12-22 04:18:50,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 04:18:50,525 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:18:50,550 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:18:50,551 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:18:50,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:18:50,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1991822609, now seen corresponding path program 1 times [2020-12-22 04:18:50,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:18:50,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286501897] [2020-12-22 04:18:50,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:18:50,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:50,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:18:50,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286501897] [2020-12-22 04:18:50,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:18:50,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 04:18:50,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224271616] [2020-12-22 04:18:50,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 04:18:50,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:18:50,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 04:18:50,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:18:50,904 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-12-22 04:18:50,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:18:50,934 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2020-12-22 04:18:50,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 04:18:50,936 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-22 04:18:50,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:18:50,964 INFO L225 Difference]: With dead ends: 40 [2020-12-22 04:18:50,964 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 04:18:50,972 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 [2020-12-22 04:18:50,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 04:18:51,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-22 04:18:51,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 04:18:51,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-12-22 04:18:51,022 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 9 [2020-12-22 04:18:51,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:18:51,023 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-12-22 04:18:51,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 04:18:51,023 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-12-22 04:18:51,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 04:18:51,025 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:18:51,025 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:18:51,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:18:51,026 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:18:51,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:18:51,031 INFO L82 PathProgramCache]: Analyzing trace with hash -2015834155, now seen corresponding path program 1 times [2020-12-22 04:18:51,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:18:51,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405630050] [2020-12-22 04:18:51,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:18:51,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:51,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:18:51,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405630050] [2020-12-22 04:18:51,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:18:51,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 04:18:51,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955175443] [2020-12-22 04:18:51,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:18:51,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:18:51,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:18:51,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:18:51,264 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 5 states. [2020-12-22 04:18:51,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:18:51,321 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2020-12-22 04:18:51,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:18:51,322 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-22 04:18:51,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:18:51,323 INFO L225 Difference]: With dead ends: 37 [2020-12-22 04:18:51,323 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 04:18:51,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:18:51,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 04:18:51,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-12-22 04:18:51,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 04:18:51,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-12-22 04:18:51,330 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2020-12-22 04:18:51,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:18:51,330 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-12-22 04:18:51,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:18:51,330 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-12-22 04:18:51,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 04:18:51,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:18:51,331 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:18:51,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 04:18:51,332 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:18:51,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:18:51,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1565261075, now seen corresponding path program 1 times [2020-12-22 04:18:51,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:18:51,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256601438] [2020-12-22 04:18:51,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:18:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:51,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:18:51,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256601438] [2020-12-22 04:18:51,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153737411] [2020-12-22 04:18:51,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:18:51,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:51,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 04:18:51,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:18:51,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:18:51,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:18:51,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-12-22 04:18:51,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138378559] [2020-12-22 04:18:51,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:18:51,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:18:51,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:18:51,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:18:51,710 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 6 states. [2020-12-22 04:18:51,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:18:51,809 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2020-12-22 04:18:51,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:18:51,811 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-22 04:18:51,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:18:51,817 INFO L225 Difference]: With dead ends: 45 [2020-12-22 04:18:51,817 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 04:18:51,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:18:51,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 04:18:51,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2020-12-22 04:18:51,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 04:18:51,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-12-22 04:18:51,827 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 11 [2020-12-22 04:18:51,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:18:51,828 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-12-22 04:18:51,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:18:51,828 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-12-22 04:18:51,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 04:18:51,831 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:18:51,831 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:18:52,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 04:18:52,045 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:18:52,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:18:52,047 INFO L82 PathProgramCache]: Analyzing trace with hash 797223332, now seen corresponding path program 1 times [2020-12-22 04:18:52,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:18:52,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837983206] [2020-12-22 04:18:52,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:18:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:52,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:18:52,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837983206] [2020-12-22 04:18:52,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747515739] [2020-12-22 04:18:52,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:18:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:52,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 04:18:52,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:18:52,677 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:52,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:52,805 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2020-12-22 04:18:52,808 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:52,819 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:52,824 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 04:18:52,824 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:30 [2020-12-22 04:18:52,886 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:52,890 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:52,894 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:52,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:18:52,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:18:52,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 18 [2020-12-22 04:18:52,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714287252] [2020-12-22 04:18:52,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 04:18:52,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:18:52,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 04:18:52,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:18:52,923 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 18 states. [2020-12-22 04:18:53,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:18:53,422 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2020-12-22 04:18:53,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 04:18:53,423 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2020-12-22 04:18:53,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:18:53,426 INFO L225 Difference]: With dead ends: 66 [2020-12-22 04:18:53,427 INFO L226 Difference]: Without dead ends: 53 [2020-12-22 04:18:53,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:18:53,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-22 04:18:53,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2020-12-22 04:18:53,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-22 04:18:53,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2020-12-22 04:18:53,447 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 19 [2020-12-22 04:18:53,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:18:53,448 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2020-12-22 04:18:53,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 04:18:53,450 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2020-12-22 04:18:53,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 04:18:53,450 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:18:53,451 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:18:53,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:18:53,665 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:18:53,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:18:53,666 INFO L82 PathProgramCache]: Analyzing trace with hash -815236263, now seen corresponding path program 1 times [2020-12-22 04:18:53,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:18:53,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135817562] [2020-12-22 04:18:53,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:18:53,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:54,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:18:54,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135817562] [2020-12-22 04:18:54,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809769870] [2020-12-22 04:18:54,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:18:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:54,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 04:18:54,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:18:54,256 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:54,310 INFO L348 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2020-12-22 04:18:54,310 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2020-12-22 04:18:54,312 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:54,323 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:54,326 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. [2020-12-22 04:18:54,326 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:44 [2020-12-22 04:18:54,575 INFO L348 Elim1Store]: treesize reduction 17, result has 85.8 percent of original size [2020-12-22 04:18:54,576 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 121 [2020-12-22 04:18:54,579 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:54,580 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:54,584 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:54,619 INFO L625 ElimStorePlain]: treesize reduction 97, result has 27.1 percent of original size [2020-12-22 04:18:54,626 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 04:18:54,627 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:63, output treesize:33 [2020-12-22 04:18:54,787 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:54,791 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:54,794 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:54,801 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:54,806 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:18:54,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:18:54,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:18:54,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2020-12-22 04:18:54,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744130649] [2020-12-22 04:18:54,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 04:18:54,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:18:54,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 04:18:54,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:18:54,844 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 24 states. [2020-12-22 04:18:56,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:18:56,268 INFO L93 Difference]: Finished difference Result 111 states and 139 transitions. [2020-12-22 04:18:56,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 04:18:56,270 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 22 [2020-12-22 04:18:56,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:18:56,273 INFO L225 Difference]: With dead ends: 111 [2020-12-22 04:18:56,273 INFO L226 Difference]: Without dead ends: 88 [2020-12-22 04:18:56,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=325, Invalid=1655, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:18:56,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-22 04:18:56,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 38. [2020-12-22 04:18:56,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 04:18:56,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2020-12-22 04:18:56,284 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 22 [2020-12-22 04:18:56,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:18:56,285 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2020-12-22 04:18:56,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 04:18:56,285 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2020-12-22 04:18:56,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 04:18:56,286 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:18:56,286 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:18:56,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:18:56,502 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:18:56,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:18:56,503 INFO L82 PathProgramCache]: Analyzing trace with hash 755836794, now seen corresponding path program 1 times [2020-12-22 04:18:56,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:18:56,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711189211] [2020-12-22 04:18:56,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:18:56,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:18:56,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711189211] [2020-12-22 04:18:56,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954187872] [2020-12-22 04:18:56,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:18:56,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:56,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 04:18:56,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:18:56,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:18:56,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:18:56,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 04:18:56,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968238283] [2020-12-22 04:18:56,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:18:56,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:18:56,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:18:56,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:18:56,850 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 9 states. [2020-12-22 04:18:57,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:18:57,036 INFO L93 Difference]: Finished difference Result 104 states and 129 transitions. [2020-12-22 04:18:57,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:18:57,036 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-12-22 04:18:57,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:18:57,037 INFO L225 Difference]: With dead ends: 104 [2020-12-22 04:18:57,038 INFO L226 Difference]: Without dead ends: 61 [2020-12-22 04:18:57,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:18:57,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-22 04:18:57,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-12-22 04:18:57,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 04:18:57,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2020-12-22 04:18:57,048 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 23 [2020-12-22 04:18:57,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:18:57,048 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2020-12-22 04:18:57,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:18:57,049 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2020-12-22 04:18:57,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 04:18:57,050 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:18:57,050 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:18:57,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:18:57,264 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:18:57,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:18:57,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1879558005, now seen corresponding path program 2 times [2020-12-22 04:18:57,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:18:57,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241971336] [2020-12-22 04:18:57,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:18:57,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:57,859 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:18:57,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241971336] [2020-12-22 04:18:57,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930086987] [2020-12-22 04:18:57,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:18:57,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:18:57,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:18:57,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 04:18:57,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:18:58,077 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:58,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:58,110 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2020-12-22 04:18:58,111 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:58,129 INFO L625 ElimStorePlain]: treesize reduction 7, result has 83.7 percent of original size [2020-12-22 04:18:58,131 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:18:58,131 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:33 [2020-12-22 04:18:58,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:58,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:58,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:58,216 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:58,217 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2020-12-22 04:18:58,219 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:58,228 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:58,230 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:18:58,230 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:17 [2020-12-22 04:18:58,257 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:58,259 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:58,262 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:58,284 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:18:58,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:18:58,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 21 [2020-12-22 04:18:58,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043959599] [2020-12-22 04:18:58,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:18:58,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:18:58,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:18:58,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:18:58,286 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand 21 states. [2020-12-22 04:18:59,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:18:59,116 INFO L93 Difference]: Finished difference Result 121 states and 154 transitions. [2020-12-22 04:18:59,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 04:18:59,117 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 27 [2020-12-22 04:18:59,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:18:59,118 INFO L225 Difference]: With dead ends: 121 [2020-12-22 04:18:59,118 INFO L226 Difference]: Without dead ends: 119 [2020-12-22 04:18:59,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=262, Invalid=998, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:18:59,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-22 04:18:59,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 56. [2020-12-22 04:18:59,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-22 04:18:59,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2020-12-22 04:18:59,135 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 27 [2020-12-22 04:18:59,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:18:59,136 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2020-12-22 04:18:59,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:18:59,136 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2020-12-22 04:18:59,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 04:18:59,137 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:18:59,137 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:18:59,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 04:18:59,351 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:18:59,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:18:59,352 INFO L82 PathProgramCache]: Analyzing trace with hash 17457638, now seen corresponding path program 1 times [2020-12-22 04:18:59,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:18:59,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052619918] [2020-12-22 04:18:59,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:18:59,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:59,671 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:18:59,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052619918] [2020-12-22 04:18:59,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96455743] [2020-12-22 04:18:59,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:18:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:59,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 04:18:59,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:18:59,837 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:59,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:59,867 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2020-12-22 04:18:59,868 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:59,878 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:59,881 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 04:18:59,882 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:35 [2020-12-22 04:18:59,933 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:59,936 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:59,939 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:59,957 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:18:59,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:18:59,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-12-22 04:18:59,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943366445] [2020-12-22 04:18:59,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 04:18:59,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:18:59,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 04:18:59,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:18:59,960 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand 15 states. [2020-12-22 04:19:00,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:19:00,900 INFO L93 Difference]: Finished difference Result 179 states and 231 transitions. [2020-12-22 04:19:00,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 04:19:00,900 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-12-22 04:19:00,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:19:00,903 INFO L225 Difference]: With dead ends: 179 [2020-12-22 04:19:00,903 INFO L226 Difference]: Without dead ends: 153 [2020-12-22 04:19:00,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=298, Invalid=1594, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:19:00,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-22 04:19:00,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 70. [2020-12-22 04:19:00,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-22 04:19:00,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 91 transitions. [2020-12-22 04:19:00,919 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 91 transitions. Word has length 30 [2020-12-22 04:19:00,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:19:00,919 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 91 transitions. [2020-12-22 04:19:00,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 04:19:00,919 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 91 transitions. [2020-12-22 04:19:00,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 04:19:00,920 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:19:00,921 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:19:01,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:01,135 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:19:01,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:19:01,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1513919954, now seen corresponding path program 2 times [2020-12-22 04:19:01,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:19:01,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317340635] [2020-12-22 04:19:01,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:19:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:19:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:19:01,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317340635] [2020-12-22 04:19:01,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629732904] [2020-12-22 04:19:01,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:01,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:19:01,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:19:01,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 04:19:01,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:19:01,916 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:01,978 INFO L348 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2020-12-22 04:19:01,979 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2020-12-22 04:19:01,980 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:01,992 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:01,995 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. [2020-12-22 04:19:01,995 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:48 [2020-12-22 04:19:02,238 INFO L348 Elim1Store]: treesize reduction 17, result has 85.8 percent of original size [2020-12-22 04:19:02,239 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 121 [2020-12-22 04:19:02,241 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:02,242 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:02,244 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:02,294 INFO L625 ElimStorePlain]: treesize reduction 99, result has 28.3 percent of original size [2020-12-22 04:19:02,299 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 04:19:02,299 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:67, output treesize:36 [2020-12-22 04:19:02,542 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:02,543 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 125 [2020-12-22 04:19:02,545 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:02,547 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:02,548 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:02,551 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:02,586 INFO L625 ElimStorePlain]: treesize reduction 57, result has 42.4 percent of original size [2020-12-22 04:19:02,590 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 04:19:02,591 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:46, output treesize:33 [2020-12-22 04:19:02,734 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:02,736 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:02,739 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:02,743 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:02,746 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:19:02,784 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:19:02,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:19:02,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2020-12-22 04:19:02,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439322542] [2020-12-22 04:19:02,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 04:19:02,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:19:02,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 04:19:02,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:19:02,787 INFO L87 Difference]: Start difference. First operand 70 states and 91 transitions. Second operand 31 states. [2020-12-22 04:19:05,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:19:05,347 INFO L93 Difference]: Finished difference Result 181 states and 228 transitions. [2020-12-22 04:19:05,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 04:19:05,348 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2020-12-22 04:19:05,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:19:05,349 INFO L225 Difference]: With dead ends: 181 [2020-12-22 04:19:05,350 INFO L226 Difference]: Without dead ends: 151 [2020-12-22 04:19:05,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=480, Invalid=3060, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 04:19:05,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-22 04:19:05,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 87. [2020-12-22 04:19:05,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-22 04:19:05,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 113 transitions. [2020-12-22 04:19:05,366 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 113 transitions. Word has length 30 [2020-12-22 04:19:05,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:19:05,366 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 113 transitions. [2020-12-22 04:19:05,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 04:19:05,367 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 113 transitions. [2020-12-22 04:19:05,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 04:19:05,368 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:19:05,368 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:19:05,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:05,583 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:19:05,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:19:05,584 INFO L82 PathProgramCache]: Analyzing trace with hash 406516939, now seen corresponding path program 2 times [2020-12-22 04:19:05,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:19:05,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803237941] [2020-12-22 04:19:05,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:19:05,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:19:05,794 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:19:05,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803237941] [2020-12-22 04:19:05,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366119710] [2020-12-22 04:19:05,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:05,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:19:05,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:19:05,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 04:19:05,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:19:05,988 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-22 04:19:05,989 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:05,998 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:05,999 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:05,999 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:7 [2020-12-22 04:19:06,011 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:06,063 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-12-22 04:19:06,063 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2020-12-22 04:19:06,064 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:06,070 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:06,071 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:06,071 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:15 [2020-12-22 04:19:06,167 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:06,169 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:06,171 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:19:06,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:19:06,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 19 [2020-12-22 04:19:06,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779594901] [2020-12-22 04:19:06,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 04:19:06,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:19:06,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 04:19:06,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:19:06,200 INFO L87 Difference]: Start difference. First operand 87 states and 113 transitions. Second operand 19 states. [2020-12-22 04:19:06,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:19:06,970 INFO L93 Difference]: Finished difference Result 129 states and 164 transitions. [2020-12-22 04:19:06,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 04:19:06,971 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 31 [2020-12-22 04:19:06,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:19:06,972 INFO L225 Difference]: With dead ends: 129 [2020-12-22 04:19:06,973 INFO L226 Difference]: Without dead ends: 127 [2020-12-22 04:19:06,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:19:06,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-12-22 04:19:06,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 98. [2020-12-22 04:19:06,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-22 04:19:06,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 126 transitions. [2020-12-22 04:19:06,989 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 126 transitions. Word has length 31 [2020-12-22 04:19:06,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:19:06,989 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 126 transitions. [2020-12-22 04:19:06,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 04:19:06,990 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 126 transitions. [2020-12-22 04:19:06,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 04:19:06,991 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:19:06,991 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:19:07,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 04:19:07,207 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:19:07,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:19:07,208 INFO L82 PathProgramCache]: Analyzing trace with hash -16980523, now seen corresponding path program 2 times [2020-12-22 04:19:07,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:19:07,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096662435] [2020-12-22 04:19:07,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:19:07,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:19:07,276 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:19:07,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096662435] [2020-12-22 04:19:07,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291591142] [2020-12-22 04:19:07,278 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:07,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:19:07,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:19:07,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:19:07,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:19:07,392 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:19:07,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:19:07,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 04:19:07,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27872762] [2020-12-22 04:19:07,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:19:07,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:19:07,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:19:07,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:19:07,395 INFO L87 Difference]: Start difference. First operand 98 states and 126 transitions. Second operand 9 states. [2020-12-22 04:19:07,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:19:07,608 INFO L93 Difference]: Finished difference Result 152 states and 189 transitions. [2020-12-22 04:19:07,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 04:19:07,609 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-12-22 04:19:07,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:19:07,610 INFO L225 Difference]: With dead ends: 152 [2020-12-22 04:19:07,610 INFO L226 Difference]: Without dead ends: 108 [2020-12-22 04:19:07,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:19:07,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-22 04:19:07,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 69. [2020-12-22 04:19:07,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-22 04:19:07,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2020-12-22 04:19:07,622 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 33 [2020-12-22 04:19:07,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:19:07,622 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2020-12-22 04:19:07,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:19:07,622 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2020-12-22 04:19:07,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 04:19:07,623 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:19:07,624 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:19:07,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:07,839 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:19:07,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:19:07,840 INFO L82 PathProgramCache]: Analyzing trace with hash 663077847, now seen corresponding path program 3 times [2020-12-22 04:19:07,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:19:07,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621500463] [2020-12-22 04:19:07,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:19:07,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:19:08,356 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:19:08,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621500463] [2020-12-22 04:19:08,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947028351] [2020-12-22 04:19:08,357 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:08,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 04:19:08,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:19:08,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 04:19:08,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:19:08,533 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:08,588 INFO L348 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2020-12-22 04:19:08,589 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2020-12-22 04:19:08,590 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:08,613 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:08,616 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. [2020-12-22 04:19:08,616 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:41 [2020-12-22 04:19:08,840 INFO L348 Elim1Store]: treesize reduction 17, result has 85.8 percent of original size [2020-12-22 04:19:08,841 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 121 [2020-12-22 04:19:08,844 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:08,845 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:08,847 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:08,890 INFO L625 ElimStorePlain]: treesize reduction 94, result has 27.7 percent of original size [2020-12-22 04:19:08,894 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 04:19:08,894 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:33 [2020-12-22 04:19:09,015 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:09,018 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:09,020 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:09,023 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:09,025 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:19:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 04:19:09,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:19:09,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2020-12-22 04:19:09,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741310048] [2020-12-22 04:19:09,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 04:19:09,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:19:09,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 04:19:09,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:19:09,059 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand 23 states. [2020-12-22 04:19:11,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:19:11,899 INFO L93 Difference]: Finished difference Result 174 states and 205 transitions. [2020-12-22 04:19:11,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-22 04:19:11,900 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 33 [2020-12-22 04:19:11,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:19:11,901 INFO L225 Difference]: With dead ends: 174 [2020-12-22 04:19:11,902 INFO L226 Difference]: Without dead ends: 141 [2020-12-22 04:19:11,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=504, Invalid=3918, Unknown=0, NotChecked=0, Total=4422 [2020-12-22 04:19:11,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-22 04:19:11,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 66. [2020-12-22 04:19:11,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-22 04:19:11,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2020-12-22 04:19:11,915 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 33 [2020-12-22 04:19:11,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:19:11,915 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2020-12-22 04:19:11,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 04:19:11,915 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2020-12-22 04:19:11,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 04:19:11,917 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:19:11,917 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:19:12,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:12,126 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:19:12,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:19:12,127 INFO L82 PathProgramCache]: Analyzing trace with hash -661066052, now seen corresponding path program 1 times [2020-12-22 04:19:12,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:19:12,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770069997] [2020-12-22 04:19:12,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:19:12,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:19:12,503 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:19:12,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770069997] [2020-12-22 04:19:12,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867855595] [2020-12-22 04:19:12,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:12,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:19:12,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 04:19:12,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:19:12,596 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:12,631 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-12-22 04:19:12,632 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 24 [2020-12-22 04:19:12,634 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:12,640 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:12,641 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:12,641 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-12-22 04:19:12,833 INFO L348 Elim1Store]: treesize reduction 12, result has 87.4 percent of original size [2020-12-22 04:19:12,834 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 103 [2020-12-22 04:19:12,837 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:12,838 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:12,840 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:12,869 INFO L625 ElimStorePlain]: treesize reduction 72, result has 29.4 percent of original size [2020-12-22 04:19:12,871 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 04:19:12,871 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:27 [2020-12-22 04:19:13,002 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:13,007 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:13,009 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:13,042 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:19:13,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:19:13,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 21 [2020-12-22 04:19:13,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655339248] [2020-12-22 04:19:13,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:19:13,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:19:13,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:19:13,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:19:13,044 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand 21 states. [2020-12-22 04:19:14,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:19:14,035 INFO L93 Difference]: Finished difference Result 107 states and 123 transitions. [2020-12-22 04:19:14,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 04:19:14,036 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 34 [2020-12-22 04:19:14,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:19:14,037 INFO L225 Difference]: With dead ends: 107 [2020-12-22 04:19:14,037 INFO L226 Difference]: Without dead ends: 105 [2020-12-22 04:19:14,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:19:14,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-22 04:19:14,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 69. [2020-12-22 04:19:14,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-22 04:19:14,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2020-12-22 04:19:14,049 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 34 [2020-12-22 04:19:14,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:19:14,050 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2020-12-22 04:19:14,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:19:14,050 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2020-12-22 04:19:14,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 04:19:14,051 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:19:14,051 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:19:14,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 04:19:14,265 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:19:14,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:19:14,266 INFO L82 PathProgramCache]: Analyzing trace with hash -305428703, now seen corresponding path program 3 times [2020-12-22 04:19:14,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:19:14,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124462738] [2020-12-22 04:19:14,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:19:14,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:19:14,438 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 04:19:14,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124462738] [2020-12-22 04:19:14,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840138889] [2020-12-22 04:19:14,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:14,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 04:19:14,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:19:14,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 04:19:14,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:19:14,767 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:19:14,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:19:14,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2020-12-22 04:19:14,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864823170] [2020-12-22 04:19:14,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 04:19:14,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:19:14,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 04:19:14,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:19:14,769 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand 12 states. [2020-12-22 04:19:15,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:19:15,073 INFO L93 Difference]: Finished difference Result 166 states and 201 transitions. [2020-12-22 04:19:15,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:19:15,074 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-12-22 04:19:15,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:19:15,075 INFO L225 Difference]: With dead ends: 166 [2020-12-22 04:19:15,075 INFO L226 Difference]: Without dead ends: 120 [2020-12-22 04:19:15,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:19:15,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-22 04:19:15,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-12-22 04:19:15,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-22 04:19:15,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 115 transitions. [2020-12-22 04:19:15,095 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 115 transitions. Word has length 35 [2020-12-22 04:19:15,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:19:15,095 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 115 transitions. [2020-12-22 04:19:15,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 04:19:15,096 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 115 transitions. [2020-12-22 04:19:15,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 04:19:15,097 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:19:15,097 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:19:15,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 04:19:15,313 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:19:15,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:19:15,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1379930067, now seen corresponding path program 1 times [2020-12-22 04:19:15,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:19:15,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011084053] [2020-12-22 04:19:15,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:19:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:19:16,208 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:19:16,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011084053] [2020-12-22 04:19:16,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105681587] [2020-12-22 04:19:16,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:16,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:19:16,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 04:19:16,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:19:16,381 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:16,405 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2020-12-22 04:19:16,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:16,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:16,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:16,416 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 22 [2020-12-22 04:19:16,417 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:16,422 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:16,423 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:16,432 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:16,433 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:16,433 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:36, output treesize:22 [2020-12-22 04:19:16,486 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 45 [2020-12-22 04:19:16,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:16,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:16,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:16,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:16,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:16,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:16,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:16,500 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 34 [2020-12-22 04:19:16,501 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:16,507 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:16,507 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:16,520 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:16,522 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. [2020-12-22 04:19:16,522 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:70, output treesize:50 [2020-12-22 04:19:16,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:16,765 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 04:19:16,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:16,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:16,769 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 04:19:16,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:16,773 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:16,774 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 63 [2020-12-22 04:19:16,776 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:16,813 INFO L625 ElimStorePlain]: treesize reduction 37, result has 59.8 percent of original size [2020-12-22 04:19:16,817 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 04:19:16,817 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:77, output treesize:55 [2020-12-22 04:19:17,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:17,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:17,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:17,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:17,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:17,151 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:17,151 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 57 treesize of output 92 [2020-12-22 04:19:17,154 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:17,216 INFO L625 ElimStorePlain]: treesize reduction 22, result has 78.6 percent of original size [2020-12-22 04:19:17,220 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:17,222 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:19:17,225 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:19:17,226 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:19:17,229 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 04:19:17,230 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:74, output treesize:60 [2020-12-22 04:19:17,231 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:19:17,232 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:19:17,453 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:17,458 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:17,459 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:17,502 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:19:17,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:19:17,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 32 [2020-12-22 04:19:17,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172241578] [2020-12-22 04:19:17,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 04:19:17,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:19:17,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 04:19:17,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:19:17,504 INFO L87 Difference]: Start difference. First operand 100 states and 115 transitions. Second operand 32 states. [2020-12-22 04:19:19,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:19:19,654 INFO L93 Difference]: Finished difference Result 181 states and 205 transitions. [2020-12-22 04:19:19,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 04:19:19,655 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 37 [2020-12-22 04:19:19,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:19:19,656 INFO L225 Difference]: With dead ends: 181 [2020-12-22 04:19:19,656 INFO L226 Difference]: Without dead ends: 157 [2020-12-22 04:19:19,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 23 SyntacticMatches, 10 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=430, Invalid=2876, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 04:19:19,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-22 04:19:19,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 140. [2020-12-22 04:19:19,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-12-22 04:19:19,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 163 transitions. [2020-12-22 04:19:19,676 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 163 transitions. Word has length 37 [2020-12-22 04:19:19,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:19:19,676 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 163 transitions. [2020-12-22 04:19:19,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 04:19:19,676 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 163 transitions. [2020-12-22 04:19:19,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 04:19:19,677 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:19:19,677 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:19:19,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 04:19:19,879 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:19:19,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:19:19,880 INFO L82 PathProgramCache]: Analyzing trace with hash -306701003, now seen corresponding path program 3 times [2020-12-22 04:19:19,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:19:19,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680603289] [2020-12-22 04:19:19,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:19:19,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:19:20,624 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:19:20,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680603289] [2020-12-22 04:19:20,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478637652] [2020-12-22 04:19:20,625 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:20,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-22 04:19:20,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:19:20,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 04:19:20,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:19:20,834 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:20,866 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2020-12-22 04:19:20,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:20,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:20,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:20,874 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2020-12-22 04:19:20,876 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:20,881 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:20,881 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:20,890 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:20,891 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:20,891 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:32, output treesize:20 [2020-12-22 04:19:21,012 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 39 [2020-12-22 04:19:21,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:21,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:21,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:21,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:21,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:21,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:21,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:21,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:21,025 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 34 [2020-12-22 04:19:21,026 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:21,031 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:21,032 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:21,044 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:21,046 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:21,046 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:54, output treesize:25 [2020-12-22 04:19:21,104 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 42 [2020-12-22 04:19:21,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:21,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:21,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:21,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:21,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:21,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:21,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:21,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:21,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:21,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:21,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:21,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:21,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:21,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:21,123 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 38 [2020-12-22 04:19:21,125 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:21,131 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:21,132 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:21,143 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:21,144 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:21,144 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:35 [2020-12-22 04:19:21,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:21,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:21,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:21,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:21,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:21,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:21,247 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:21,247 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 41 [2020-12-22 04:19:21,249 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:21,258 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:21,260 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:21,260 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:17 [2020-12-22 04:19:21,294 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:21,296 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:21,297 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:21,329 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:19:21,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:19:21,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 24 [2020-12-22 04:19:21,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343106502] [2020-12-22 04:19:21,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 04:19:21,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:19:21,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 04:19:21,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:19:21,331 INFO L87 Difference]: Start difference. First operand 140 states and 163 transitions. Second operand 24 states. [2020-12-22 04:19:22,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:19:22,662 INFO L93 Difference]: Finished difference Result 247 states and 294 transitions. [2020-12-22 04:19:22,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 04:19:22,663 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 38 [2020-12-22 04:19:22,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:19:22,664 INFO L225 Difference]: With dead ends: 247 [2020-12-22 04:19:22,664 INFO L226 Difference]: Without dead ends: 224 [2020-12-22 04:19:22,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 13 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=316, Invalid=1576, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:19:22,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-12-22 04:19:22,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 146. [2020-12-22 04:19:22,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-12-22 04:19:22,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 172 transitions. [2020-12-22 04:19:22,689 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 172 transitions. Word has length 38 [2020-12-22 04:19:22,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:19:22,689 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 172 transitions. [2020-12-22 04:19:22,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 04:19:22,689 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 172 transitions. [2020-12-22 04:19:22,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 04:19:22,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:19:22,690 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:19:22,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:22,904 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:19:22,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:19:22,904 INFO L82 PathProgramCache]: Analyzing trace with hash -558214917, now seen corresponding path program 4 times [2020-12-22 04:19:22,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:19:22,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064330177] [2020-12-22 04:19:22,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:19:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:19:23,475 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:19:23,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064330177] [2020-12-22 04:19:23,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611949257] [2020-12-22 04:19:23,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:23,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:19:23,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:19:23,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 04:19:23,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:19:23,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:23,646 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2020-12-22 04:19:23,647 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:23,658 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:23,659 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:23,659 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:36 [2020-12-22 04:19:23,712 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:23,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:23,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:23,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:23,852 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:23,852 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 42 [2020-12-22 04:19:23,855 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:23,880 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:23,881 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:23,882 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:31 [2020-12-22 04:19:24,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:24,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:24,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:24,028 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:24,028 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2020-12-22 04:19:24,029 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:24,040 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:24,042 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:24,043 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:17 [2020-12-22 04:19:24,072 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:24,073 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:24,075 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:24,108 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:19:24,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:19:24,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 25 [2020-12-22 04:19:24,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945835318] [2020-12-22 04:19:24,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 04:19:24,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:19:24,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 04:19:24,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:19:24,110 INFO L87 Difference]: Start difference. First operand 146 states and 172 transitions. Second operand 25 states. [2020-12-22 04:19:25,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:19:25,735 INFO L93 Difference]: Finished difference Result 196 states and 229 transitions. [2020-12-22 04:19:25,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 04:19:25,736 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 38 [2020-12-22 04:19:25,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:19:25,737 INFO L225 Difference]: With dead ends: 196 [2020-12-22 04:19:25,737 INFO L226 Difference]: Without dead ends: 194 [2020-12-22 04:19:25,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=374, Invalid=1882, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:19:25,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-12-22 04:19:25,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 156. [2020-12-22 04:19:25,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-12-22 04:19:25,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 187 transitions. [2020-12-22 04:19:25,761 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 187 transitions. Word has length 38 [2020-12-22 04:19:25,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:19:25,762 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 187 transitions. [2020-12-22 04:19:25,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 04:19:25,762 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 187 transitions. [2020-12-22 04:19:25,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 04:19:25,762 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:19:25,763 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:19:25,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 04:19:25,972 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:19:25,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:19:25,973 INFO L82 PathProgramCache]: Analyzing trace with hash -2011283546, now seen corresponding path program 2 times [2020-12-22 04:19:25,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:19:25,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462837994] [2020-12-22 04:19:25,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:19:26,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:19:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:19:27,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462837994] [2020-12-22 04:19:27,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592587208] [2020-12-22 04:19:27,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:27,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:19:27,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:19:27,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 04:19:27,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:19:27,273 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:27,345 INFO L348 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2020-12-22 04:19:27,345 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2020-12-22 04:19:27,347 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:27,361 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:27,363 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. [2020-12-22 04:19:27,363 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:48 [2020-12-22 04:19:27,687 INFO L348 Elim1Store]: treesize reduction 17, result has 85.8 percent of original size [2020-12-22 04:19:27,688 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 121 [2020-12-22 04:19:27,694 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:27,694 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:27,697 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:27,754 INFO L625 ElimStorePlain]: treesize reduction 100, result has 27.5 percent of original size [2020-12-22 04:19:27,757 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 04:19:27,757 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:67, output treesize:30 [2020-12-22 04:19:28,055 INFO L348 Elim1Store]: treesize reduction 72, result has 58.1 percent of original size [2020-12-22 04:19:28,055 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 40 treesize of output 112 [2020-12-22 04:19:28,057 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:28,059 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:28,060 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:28,063 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:28,101 INFO L625 ElimStorePlain]: treesize reduction 60, result has 42.9 percent of original size [2020-12-22 04:19:28,102 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. [2020-12-22 04:19:28,103 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:45 [2020-12-22 04:19:28,609 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 68 [2020-12-22 04:19:28,610 INFO L348 Elim1Store]: treesize reduction 128, result has 66.5 percent of original size [2020-12-22 04:19:28,611 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 60 treesize of output 272 [2020-12-22 04:19:28,617 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 2, 1] term [2020-12-22 04:19:28,617 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-22 04:19:28,618 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 1] term [2020-12-22 04:19:28,618 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:19:28,619 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-12-22 04:19:28,619 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:19:28,620 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-12-22 04:19:28,620 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:28,620 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-12-22 04:19:28,621 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:28,622 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:28,623 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:28,624 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:28,624 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:19:28,626 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:19:28,626 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:28,627 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:28,631 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-22 04:19:28,633 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:19:28,634 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:19:28,634 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:28,635 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:28,637 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:28,638 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:28,638 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:28,639 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:28,639 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:28,641 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 04:19:28,642 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 04:19:28,644 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:28,644 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:28,646 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:28,648 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:28,650 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-12-22 04:19:28,650 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:28,652 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:28,663 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:28,795 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 27 [2020-12-22 04:19:28,796 INFO L625 ElimStorePlain]: treesize reduction 775, result has 6.1 percent of original size [2020-12-22 04:19:28,798 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 04:19:28,798 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:50 [2020-12-22 04:19:29,350 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-12-22 04:19:29,351 INFO L348 Elim1Store]: treesize reduction 17, result has 94.1 percent of original size [2020-12-22 04:19:29,352 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 54 treesize of output 287 [2020-12-22 04:19:29,357 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 2, 1] term [2020-12-22 04:19:29,357 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-22 04:19:29,358 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 1] term [2020-12-22 04:19:29,359 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:19:29,360 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-12-22 04:19:29,360 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:19:29,360 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-12-22 04:19:29,361 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:29,361 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-12-22 04:19:29,361 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:29,363 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:29,364 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:29,366 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:29,367 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:29,368 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:29,369 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:29,369 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:29,371 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:29,373 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 04:19:29,375 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 04:19:29,377 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:29,377 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:29,379 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:29,380 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:29,380 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:29,381 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:29,381 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:29,383 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:29,385 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:29,386 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:29,386 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:29,388 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:29,389 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:29,390 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:29,390 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:29,392 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:29,392 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:29,393 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:29,393 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:29,395 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 04:19:29,397 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 04:19:29,399 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:29,400 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:29,412 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:29,675 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 40 [2020-12-22 04:19:29,676 INFO L625 ElimStorePlain]: treesize reduction 889, result has 9.7 percent of original size [2020-12-22 04:19:29,679 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:29,681 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:29,682 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:29,684 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:29,685 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:29,687 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:19:29,689 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 04:19:29,689 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:69, output treesize:74 [2020-12-22 04:19:29,691 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:29,691 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:29,692 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:19:29,776 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:29,778 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:29,779 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:19:29,881 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:29,883 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:29,884 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:19:29,987 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:29,989 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:29,991 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:19:30,338 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:30,341 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:30,343 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:30,345 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:30,346 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:19:30,414 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:19:30,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:19:30,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 46 [2020-12-22 04:19:30,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417838943] [2020-12-22 04:19:30,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 04:19:30,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:19:30,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 04:19:30,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1899, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 04:19:30,416 INFO L87 Difference]: Start difference. First operand 156 states and 187 transitions. Second operand 46 states. [2020-12-22 04:19:31,015 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-12-22 04:19:33,084 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 40 [2020-12-22 04:19:35,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:19:35,130 INFO L93 Difference]: Finished difference Result 188 states and 222 transitions. [2020-12-22 04:19:35,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 04:19:35,131 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 40 [2020-12-22 04:19:35,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:19:35,133 INFO L225 Difference]: With dead ends: 188 [2020-12-22 04:19:35,133 INFO L226 Difference]: Without dead ends: 156 [2020-12-22 04:19:35,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2341 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=689, Invalid=6283, Unknown=0, NotChecked=0, Total=6972 [2020-12-22 04:19:35,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-12-22 04:19:35,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 117. [2020-12-22 04:19:35,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-22 04:19:35,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 145 transitions. [2020-12-22 04:19:35,151 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 145 transitions. Word has length 40 [2020-12-22 04:19:35,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:19:35,151 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 145 transitions. [2020-12-22 04:19:35,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 04:19:35,151 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 145 transitions. [2020-12-22 04:19:35,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 04:19:35,152 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:19:35,152 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:19:35,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 04:19:35,353 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:19:35,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:19:35,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1940573146, now seen corresponding path program 5 times [2020-12-22 04:19:35,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:19:35,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862503918] [2020-12-22 04:19:35,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:19:35,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:19:35,784 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 47 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:19:35,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862503918] [2020-12-22 04:19:35,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008708984] [2020-12-22 04:19:35,785 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:35,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 04:19:35,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:19:35,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 04:19:35,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:19:36,159 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:36,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:36,194 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2020-12-22 04:19:36,195 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:36,209 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:36,212 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 04:19:36,213 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:35 [2020-12-22 04:19:36,281 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:36,283 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:36,285 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:36,311 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:19:36,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:19:36,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2020-12-22 04:19:36,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001148081] [2020-12-22 04:19:36,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 04:19:36,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:19:36,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 04:19:36,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:19:36,313 INFO L87 Difference]: Start difference. First operand 117 states and 145 transitions. Second operand 22 states. [2020-12-22 04:19:39,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:19:39,278 INFO L93 Difference]: Finished difference Result 289 states and 351 transitions. [2020-12-22 04:19:39,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-22 04:19:39,279 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 41 [2020-12-22 04:19:39,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:19:39,281 INFO L225 Difference]: With dead ends: 289 [2020-12-22 04:19:39,281 INFO L226 Difference]: Without dead ends: 287 [2020-12-22 04:19:39,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1913 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=812, Invalid=5194, Unknown=0, NotChecked=0, Total=6006 [2020-12-22 04:19:39,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-12-22 04:19:39,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 134. [2020-12-22 04:19:39,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-22 04:19:39,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 173 transitions. [2020-12-22 04:19:39,301 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 173 transitions. Word has length 41 [2020-12-22 04:19:39,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:19:39,302 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 173 transitions. [2020-12-22 04:19:39,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 04:19:39,302 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 173 transitions. [2020-12-22 04:19:39,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 04:19:39,303 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:19:39,303 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:19:39,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:39,509 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:19:39,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:19:39,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1605031192, now seen corresponding path program 4 times [2020-12-22 04:19:39,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:19:39,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194984906] [2020-12-22 04:19:39,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:19:39,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:19:40,612 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:19:40,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194984906] [2020-12-22 04:19:40,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369262774] [2020-12-22 04:19:40,613 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:40,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:19:40,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:19:40,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 04:19:40,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:19:40,816 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:40,888 INFO L348 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2020-12-22 04:19:40,889 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2020-12-22 04:19:40,890 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:40,905 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:40,906 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. [2020-12-22 04:19:40,906 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:44 [2020-12-22 04:19:41,250 INFO L348 Elim1Store]: treesize reduction 17, result has 85.8 percent of original size [2020-12-22 04:19:41,251 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 121 [2020-12-22 04:19:41,252 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:41,253 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:41,255 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:41,309 INFO L625 ElimStorePlain]: treesize reduction 94, result has 29.3 percent of original size [2020-12-22 04:19:41,312 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 04:19:41,313 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:63, output treesize:36 [2020-12-22 04:19:41,593 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:41,594 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 38 treesize of output 140 [2020-12-22 04:19:41,596 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:41,598 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:41,599 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:41,601 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:41,650 INFO L625 ElimStorePlain]: treesize reduction 65, result has 42.5 percent of original size [2020-12-22 04:19:41,654 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 04:19:41,655 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:52, output treesize:33 [2020-12-22 04:19:41,819 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:41,821 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:41,823 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:41,825 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:41,827 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:19:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-22 04:19:41,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:19:41,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15] total 35 [2020-12-22 04:19:41,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550689572] [2020-12-22 04:19:41,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 04:19:41,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:19:41,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 04:19:41,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:19:41,880 INFO L87 Difference]: Start difference. First operand 134 states and 173 transitions. Second operand 35 states. [2020-12-22 04:19:51,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:19:51,543 INFO L93 Difference]: Finished difference Result 280 states and 351 transitions. [2020-12-22 04:19:51,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-22 04:19:51,544 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 41 [2020-12-22 04:19:51,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:19:51,545 INFO L225 Difference]: With dead ends: 280 [2020-12-22 04:19:51,545 INFO L226 Difference]: Without dead ends: 235 [2020-12-22 04:19:51,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2229 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=912, Invalid=6918, Unknown=2, NotChecked=0, Total=7832 [2020-12-22 04:19:51,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-12-22 04:19:51,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 149. [2020-12-22 04:19:51,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-12-22 04:19:51,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 189 transitions. [2020-12-22 04:19:51,569 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 189 transitions. Word has length 41 [2020-12-22 04:19:51,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:19:51,570 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 189 transitions. [2020-12-22 04:19:51,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 04:19:51,570 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 189 transitions. [2020-12-22 04:19:51,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 04:19:51,570 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:19:51,570 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:19:51,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:51,779 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:19:51,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:19:51,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1758205096, now seen corresponding path program 5 times [2020-12-22 04:19:51,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:19:51,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968629065] [2020-12-22 04:19:51,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:19:51,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:19:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:19:52,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968629065] [2020-12-22 04:19:52,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705680435] [2020-12-22 04:19:52,572 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:52,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 04:19:52,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:19:52,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 04:19:52,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:19:53,007 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:53,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:53,074 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2020-12-22 04:19:53,075 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:53,089 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:53,090 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:53,091 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:44 [2020-12-22 04:19:53,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:53,316 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:53,316 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 30 [2020-12-22 04:19:53,318 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:53,332 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:53,334 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:53,334 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:30 [2020-12-22 04:19:53,493 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 34 [2020-12-22 04:19:53,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:53,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:53,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:53,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:53,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:53,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:53,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:53,508 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 36 [2020-12-22 04:19:53,509 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:53,515 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:53,516 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:53,526 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:53,528 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:53,528 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2020-12-22 04:19:53,567 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 44 [2020-12-22 04:19:53,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:53,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:53,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:53,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:53,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:53,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:53,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:53,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:53,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:53,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:53,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:53,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:53,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:53,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:53,592 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2020-12-22 04:19:53,593 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:53,599 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:53,600 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:53,611 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:53,614 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:53,614 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:63, output treesize:37 [2020-12-22 04:19:53,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:53,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:53,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:53,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:53,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:53,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:53,692 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:53,692 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 43 [2020-12-22 04:19:53,694 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:53,702 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:53,704 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:53,704 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:19 [2020-12-22 04:19:53,745 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:53,747 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:53,748 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:53,788 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:19:53,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:19:53,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 29 [2020-12-22 04:19:53,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272343] [2020-12-22 04:19:53,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 04:19:53,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:19:53,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 04:19:53,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:19:53,790 INFO L87 Difference]: Start difference. First operand 149 states and 189 transitions. Second operand 29 states. [2020-12-22 04:19:57,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:19:57,682 INFO L93 Difference]: Finished difference Result 375 states and 472 transitions. [2020-12-22 04:19:57,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-22 04:19:57,683 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 41 [2020-12-22 04:19:57,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:19:57,684 INFO L225 Difference]: With dead ends: 375 [2020-12-22 04:19:57,684 INFO L226 Difference]: Without dead ends: 309 [2020-12-22 04:19:57,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 25 SyntacticMatches, 10 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1810 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=606, Invalid=4944, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 04:19:57,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-12-22 04:19:57,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 162. [2020-12-22 04:19:57,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-22 04:19:57,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 201 transitions. [2020-12-22 04:19:57,713 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 201 transitions. Word has length 41 [2020-12-22 04:19:57,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:19:57,713 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 201 transitions. [2020-12-22 04:19:57,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 04:19:57,713 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 201 transitions. [2020-12-22 04:19:57,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 04:19:57,714 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:19:57,714 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:19:57,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:57,918 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:19:57,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:19:57,918 INFO L82 PathProgramCache]: Analyzing trace with hash -162895221, now seen corresponding path program 2 times [2020-12-22 04:19:57,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:19:57,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924627483] [2020-12-22 04:19:57,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:19:57,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:19:58,439 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:19:58,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924627483] [2020-12-22 04:19:58,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244017333] [2020-12-22 04:19:58,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:58,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:19:58,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:19:58,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 04:19:58,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:19:58,567 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:58,602 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:58,628 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2020-12-22 04:19:58,645 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-12-22 04:19:58,646 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 39 [2020-12-22 04:19:58,648 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:58,654 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:58,654 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:58,662 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:58,663 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:58,663 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:28, output treesize:15 [2020-12-22 04:19:58,788 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:58,791 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:58,792 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:19:58,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:19:58,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 20 [2020-12-22 04:19:58,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659362050] [2020-12-22 04:19:58,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 04:19:58,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:19:58,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 04:19:58,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:19:58,831 INFO L87 Difference]: Start difference. First operand 162 states and 201 transitions. Second operand 20 states. [2020-12-22 04:20:00,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:20:00,721 INFO L93 Difference]: Finished difference Result 338 states and 406 transitions. [2020-12-22 04:20:00,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 04:20:00,722 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 42 [2020-12-22 04:20:00,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:20:00,724 INFO L225 Difference]: With dead ends: 338 [2020-12-22 04:20:00,724 INFO L226 Difference]: Without dead ends: 336 [2020-12-22 04:20:00,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=370, Invalid=2386, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 04:20:00,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-12-22 04:20:00,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 182. [2020-12-22 04:20:00,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-22 04:20:00,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 228 transitions. [2020-12-22 04:20:00,761 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 228 transitions. Word has length 42 [2020-12-22 04:20:00,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:20:00,761 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 228 transitions. [2020-12-22 04:20:00,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 04:20:00,761 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 228 transitions. [2020-12-22 04:20:00,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 04:20:00,762 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:20:00,762 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:20:00,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 04:20:00,976 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:20:00,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:20:00,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1877035857, now seen corresponding path program 3 times [2020-12-22 04:20:00,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:20:00,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761752225] [2020-12-22 04:20:00,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:20:01,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:01,848 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:01,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761752225] [2020-12-22 04:20:01,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166442476] [2020-12-22 04:20:01,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:02,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-22 04:20:02,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:20:02,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 04:20:02,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:20:02,178 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:02,254 INFO L348 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2020-12-22 04:20:02,254 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2020-12-22 04:20:02,256 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:02,272 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:02,274 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. [2020-12-22 04:20:02,274 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:45 [2020-12-22 04:20:02,611 INFO L348 Elim1Store]: treesize reduction 17, result has 85.8 percent of original size [2020-12-22 04:20:02,611 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 121 [2020-12-22 04:20:02,621 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:20:02,622 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:02,625 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:02,685 INFO L625 ElimStorePlain]: treesize reduction 94, result has 30.4 percent of original size [2020-12-22 04:20:02,689 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 04:20:02,689 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:64, output treesize:38 [2020-12-22 04:20:03,097 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:03,097 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 37 treesize of output 135 [2020-12-22 04:20:03,100 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:03,102 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:03,103 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:03,106 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:03,162 INFO L625 ElimStorePlain]: treesize reduction 73, result has 39.2 percent of original size [2020-12-22 04:20:03,165 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 04:20:03,166 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:51, output treesize:36 [2020-12-22 04:20:03,628 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:03,630 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:03,632 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:03,634 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:03,636 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:20:03,697 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:20:03,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:20:03,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2020-12-22 04:20:03,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98963095] [2020-12-22 04:20:03,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 04:20:03,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:20:03,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 04:20:03,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:20:03,699 INFO L87 Difference]: Start difference. First operand 182 states and 228 transitions. Second operand 37 states. [2020-12-22 04:20:05,036 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-12-22 04:20:05,779 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2020-12-22 04:20:08,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:20:08,499 INFO L93 Difference]: Finished difference Result 243 states and 295 transitions. [2020-12-22 04:20:08,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 04:20:08,499 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 42 [2020-12-22 04:20:08,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:20:08,501 INFO L225 Difference]: With dead ends: 243 [2020-12-22 04:20:08,501 INFO L226 Difference]: Without dead ends: 241 [2020-12-22 04:20:08,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1603 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=612, Invalid=4790, Unknown=0, NotChecked=0, Total=5402 [2020-12-22 04:20:08,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-12-22 04:20:08,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 188. [2020-12-22 04:20:08,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-12-22 04:20:08,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 236 transitions. [2020-12-22 04:20:08,537 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 236 transitions. Word has length 42 [2020-12-22 04:20:08,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:20:08,537 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 236 transitions. [2020-12-22 04:20:08,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 04:20:08,537 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 236 transitions. [2020-12-22 04:20:08,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 04:20:08,538 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:20:08,538 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:20:08,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 04:20:08,744 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:20:08,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:20:08,745 INFO L82 PathProgramCache]: Analyzing trace with hash -2042002126, now seen corresponding path program 4 times [2020-12-22 04:20:08,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:20:08,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930975084] [2020-12-22 04:20:08,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:20:08,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:09,227 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:20:09,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930975084] [2020-12-22 04:20:09,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643196719] [2020-12-22 04:20:09,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:09,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:20:09,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:20:09,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 04:20:09,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:20:09,374 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:09,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:09,389 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-22 04:20:09,390 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:09,400 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:09,401 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:20:09,401 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2020-12-22 04:20:09,541 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:09,543 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:09,545 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:09,546 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:09,547 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:20:09,577 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:20:09,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:20:09,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-12-22 04:20:09,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318947311] [2020-12-22 04:20:09,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:20:09,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:20:09,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:20:09,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:20:09,580 INFO L87 Difference]: Start difference. First operand 188 states and 236 transitions. Second operand 17 states. [2020-12-22 04:20:10,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:20:10,723 INFO L93 Difference]: Finished difference Result 243 states and 298 transitions. [2020-12-22 04:20:10,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 04:20:10,724 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-12-22 04:20:10,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:20:10,726 INFO L225 Difference]: With dead ends: 243 [2020-12-22 04:20:10,726 INFO L226 Difference]: Without dead ends: 241 [2020-12-22 04:20:10,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 36 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:20:10,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-12-22 04:20:10,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 202. [2020-12-22 04:20:10,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-12-22 04:20:10,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 253 transitions. [2020-12-22 04:20:10,768 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 253 transitions. Word has length 43 [2020-12-22 04:20:10,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:20:10,768 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 253 transitions. [2020-12-22 04:20:10,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:20:10,768 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 253 transitions. [2020-12-22 04:20:10,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 04:20:10,769 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:20:10,769 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:20:10,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:10,984 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:20:10,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:20:10,985 INFO L82 PathProgramCache]: Analyzing trace with hash -111057598, now seen corresponding path program 6 times [2020-12-22 04:20:10,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:20:10,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916737663] [2020-12-22 04:20:10,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:20:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:11,336 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 04:20:11,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916737663] [2020-12-22 04:20:11,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042708688] [2020-12-22 04:20:11,337 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:11,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-22 04:20:11,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:20:11,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 04:20:11,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:20:11,739 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:11,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:11,865 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2020-12-22 04:20:11,867 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:11,881 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:11,887 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:20:11,888 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2020-12-22 04:20:12,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:12,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:12,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:12,079 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:12,079 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2020-12-22 04:20:12,080 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:12,092 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:12,094 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:20:12,094 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:20 [2020-12-22 04:20:12,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:12,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:12,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:12,206 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:12,207 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2020-12-22 04:20:12,209 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:12,222 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:12,224 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:20:12,224 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:20 [2020-12-22 04:20:12,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:12,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:12,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:12,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:12,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:12,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:12,355 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:12,355 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2020-12-22 04:20:12,357 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:12,369 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:12,370 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:20:12,370 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:35 [2020-12-22 04:20:12,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:12,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:12,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:12,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:12,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:12,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:12,539 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:12,540 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 41 [2020-12-22 04:20:12,542 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:12,553 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:12,554 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:20:12,555 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:17 [2020-12-22 04:20:12,672 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:12,674 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:12,675 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:12,724 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:20:12,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:20:12,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2020-12-22 04:20:12,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278070456] [2020-12-22 04:20:12,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 04:20:12,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:20:12,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 04:20:12,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:20:12,726 INFO L87 Difference]: Start difference. First operand 202 states and 253 transitions. Second operand 32 states. [2020-12-22 04:20:15,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:20:15,743 INFO L93 Difference]: Finished difference Result 552 states and 683 transitions. [2020-12-22 04:20:15,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-22 04:20:15,744 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 44 [2020-12-22 04:20:15,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:20:15,747 INFO L225 Difference]: With dead ends: 552 [2020-12-22 04:20:15,747 INFO L226 Difference]: Without dead ends: 456 [2020-12-22 04:20:15,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=555, Invalid=3477, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 04:20:15,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2020-12-22 04:20:15,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 270. [2020-12-22 04:20:15,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-12-22 04:20:15,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 334 transitions. [2020-12-22 04:20:15,791 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 334 transitions. Word has length 44 [2020-12-22 04:20:15,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:20:15,791 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 334 transitions. [2020-12-22 04:20:15,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 04:20:15,791 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 334 transitions. [2020-12-22 04:20:15,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 04:20:15,792 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:20:15,792 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:20:16,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 04:20:16,007 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:20:16,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:20:16,007 INFO L82 PathProgramCache]: Analyzing trace with hash -19765869, now seen corresponding path program 6 times [2020-12-22 04:20:16,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:20:16,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953521021] [2020-12-22 04:20:16,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:20:16,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:17,636 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:17,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953521021] [2020-12-22 04:20:17,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742888986] [2020-12-22 04:20:17,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:17,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 04:20:17,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:20:17,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 04:20:17,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:20:17,951 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:18,028 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-22 04:20:18,029 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2020-12-22 04:20:18,030 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:18,043 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:18,044 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:20:18,045 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:42 [2020-12-22 04:20:18,282 INFO L348 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2020-12-22 04:20:18,282 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 31 [2020-12-22 04:20:18,284 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:18,300 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:18,302 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 04:20:18,303 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:33 [2020-12-22 04:20:18,658 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2020-12-22 04:20:18,659 INFO L348 Elim1Store]: treesize reduction 95, result has 55.6 percent of original size [2020-12-22 04:20:18,659 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 47 treesize of output 134 [2020-12-22 04:20:18,663 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:18,665 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:18,665 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:18,667 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:18,721 INFO L625 ElimStorePlain]: treesize reduction 79, result has 40.6 percent of original size [2020-12-22 04:20:18,722 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. [2020-12-22 04:20:18,723 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:54 [2020-12-22 04:20:19,078 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2020-12-22 04:20:19,079 INFO L348 Elim1Store]: treesize reduction 113, result has 57.8 percent of original size [2020-12-22 04:20:19,080 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 9 case distinctions, treesize of input 59 treesize of output 173 [2020-12-22 04:20:19,082 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:20:19,083 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:19,084 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:20:19,084 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:20:19,085 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-12-22 04:20:19,085 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:19,086 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:20:19,087 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:19,089 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:20:19,091 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:19,094 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:19,158 INFO L625 ElimStorePlain]: treesize reduction 180, result has 20.0 percent of original size [2020-12-22 04:20:19,161 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 04:20:19,161 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:70, output treesize:30 [2020-12-22 04:20:19,331 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:19,333 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:19,334 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:19,335 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:19,336 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:20:19,398 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-22 04:20:19,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:20:19,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 17] total 39 [2020-12-22 04:20:19,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066425240] [2020-12-22 04:20:19,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 04:20:19,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:20:19,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 04:20:19,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1309, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:20:19,400 INFO L87 Difference]: Start difference. First operand 270 states and 334 transitions. Second operand 39 states. [2020-12-22 04:20:20,890 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 32 [2020-12-22 04:20:24,215 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-12-22 04:20:25,072 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-12-22 04:20:25,682 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 34 [2020-12-22 04:20:26,154 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 31 [2020-12-22 04:20:30,708 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 30 [2020-12-22 04:20:31,375 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2020-12-22 04:20:33,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:20:33,048 INFO L93 Difference]: Finished difference Result 603 states and 728 transitions. [2020-12-22 04:20:33,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2020-12-22 04:20:33,049 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 44 [2020-12-22 04:20:33,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:20:33,051 INFO L225 Difference]: With dead ends: 603 [2020-12-22 04:20:33,051 INFO L226 Difference]: Without dead ends: 519 [2020-12-22 04:20:33,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7050 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=2429, Invalid=17593, Unknown=0, NotChecked=0, Total=20022 [2020-12-22 04:20:33,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2020-12-22 04:20:33,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 231. [2020-12-22 04:20:33,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-12-22 04:20:33,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 283 transitions. [2020-12-22 04:20:33,103 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 283 transitions. Word has length 44 [2020-12-22 04:20:33,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:20:33,104 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 283 transitions. [2020-12-22 04:20:33,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 04:20:33,104 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 283 transitions. [2020-12-22 04:20:33,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 04:20:33,105 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:20:33,105 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:20:33,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:33,317 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:20:33,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:20:33,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1102094588, now seen corresponding path program 4 times [2020-12-22 04:20:33,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:20:33,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190750846] [2020-12-22 04:20:33,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:20:33,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:34,215 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 7 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:34,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190750846] [2020-12-22 04:20:34,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762135964] [2020-12-22 04:20:34,216 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:34,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:20:34,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:20:34,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 04:20:34,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:20:34,434 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:34,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:34,500 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2020-12-22 04:20:34,501 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:34,515 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:34,516 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:20:34,516 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:44 [2020-12-22 04:20:34,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:34,599 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:34,599 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 37 [2020-12-22 04:20:34,601 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:34,625 INFO L625 ElimStorePlain]: treesize reduction 7, result has 82.9 percent of original size [2020-12-22 04:20:34,626 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:20:34,627 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:72, output treesize:31 [2020-12-22 04:20:34,805 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:34,807 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:34,809 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:34,861 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:20:34,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:20:34,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15] total 28 [2020-12-22 04:20:34,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676106469] [2020-12-22 04:20:34,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 04:20:34,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:20:34,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 04:20:34,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:20:34,863 INFO L87 Difference]: Start difference. First operand 231 states and 283 transitions. Second operand 28 states. [2020-12-22 04:20:38,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:20:38,992 INFO L93 Difference]: Finished difference Result 353 states and 417 transitions. [2020-12-22 04:20:38,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-22 04:20:38,994 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 45 [2020-12-22 04:20:38,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:20:38,996 INFO L225 Difference]: With dead ends: 353 [2020-12-22 04:20:38,996 INFO L226 Difference]: Without dead ends: 351 [2020-12-22 04:20:38,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=635, Invalid=4195, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 04:20:38,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-12-22 04:20:39,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 237. [2020-12-22 04:20:39,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-12-22 04:20:39,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 291 transitions. [2020-12-22 04:20:39,053 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 291 transitions. Word has length 45 [2020-12-22 04:20:39,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:20:39,053 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 291 transitions. [2020-12-22 04:20:39,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 04:20:39,053 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 291 transitions. [2020-12-22 04:20:39,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 04:20:39,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:20:39,054 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:20:39,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 04:20:39,267 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:20:39,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:20:39,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1482023711, now seen corresponding path program 5 times [2020-12-22 04:20:39,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:20:39,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293641967] [2020-12-22 04:20:39,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:20:39,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:39,754 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:39,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293641967] [2020-12-22 04:20:39,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959208471] [2020-12-22 04:20:39,755 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:39,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-22 04:20:39,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:20:39,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 04:20:39,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:20:40,080 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:40,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:40,115 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2020-12-22 04:20:40,117 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:40,132 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:40,133 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:20:40,133 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2020-12-22 04:20:40,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:40,206 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:40,207 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 27 [2020-12-22 04:20:40,209 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:40,220 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:40,221 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:20:40,222 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:21 [2020-12-22 04:20:40,360 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:40,362 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:40,364 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:40,365 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:40,366 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:40,366 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:20:40,406 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:20:40,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:20:40,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2020-12-22 04:20:40,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132374602] [2020-12-22 04:20:40,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 04:20:40,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:20:40,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 04:20:40,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:20:40,408 INFO L87 Difference]: Start difference. First operand 237 states and 291 transitions. Second operand 18 states. [2020-12-22 04:20:41,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:20:41,734 INFO L93 Difference]: Finished difference Result 297 states and 356 transitions. [2020-12-22 04:20:41,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 04:20:41,735 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-12-22 04:20:41,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:20:41,737 INFO L225 Difference]: With dead ends: 297 [2020-12-22 04:20:41,737 INFO L226 Difference]: Without dead ends: 295 [2020-12-22 04:20:41,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:20:41,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-12-22 04:20:41,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 243. [2020-12-22 04:20:41,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-12-22 04:20:41,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 299 transitions. [2020-12-22 04:20:41,791 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 299 transitions. Word has length 46 [2020-12-22 04:20:41,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:20:41,791 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 299 transitions. [2020-12-22 04:20:41,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 04:20:41,791 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 299 transitions. [2020-12-22 04:20:41,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 04:20:41,792 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:20:41,792 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:20:41,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 04:20:41,997 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:20:41,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:20:41,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1941376246, now seen corresponding path program 7 times [2020-12-22 04:20:41,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:20:41,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244934877] [2020-12-22 04:20:41,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:20:42,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:43,275 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 2 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:43,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244934877] [2020-12-22 04:20:43,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082749182] [2020-12-22 04:20:43,276 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:43,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:43,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 04:20:43,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:20:43,457 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:43,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:43,472 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2020-12-22 04:20:43,473 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:43,487 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:43,489 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:20:43,489 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2020-12-22 04:20:43,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:43,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:43,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:43,620 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:43,620 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2020-12-22 04:20:43,621 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:43,640 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:43,642 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:20:43,643 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:25 [2020-12-22 04:20:43,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:43,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:43,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:43,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:43,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:43,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:43,761 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:43,761 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 46 [2020-12-22 04:20:43,762 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:43,782 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:43,783 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:20:43,783 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:50 [2020-12-22 04:20:43,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:43,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:43,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:43,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:43,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:43,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:43,879 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:43,880 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 49 [2020-12-22 04:20:43,881 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:43,895 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:43,897 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:20:43,898 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:61, output treesize:25 [2020-12-22 04:20:43,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:43,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:43,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:43,982 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:43,982 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2020-12-22 04:20:43,984 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:43,996 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:43,998 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:20:43,998 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:17 [2020-12-22 04:20:44,044 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:44,045 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:44,047 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 04:20:44,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:20:44,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19] total 29 [2020-12-22 04:20:44,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10195135] [2020-12-22 04:20:44,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 04:20:44,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:20:44,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 04:20:44,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:20:44,102 INFO L87 Difference]: Start difference. First operand 243 states and 299 transitions. Second operand 29 states. [2020-12-22 04:20:47,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:20:47,070 INFO L93 Difference]: Finished difference Result 390 states and 467 transitions. [2020-12-22 04:20:47,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 04:20:47,071 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 46 [2020-12-22 04:20:47,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:20:47,073 INFO L225 Difference]: With dead ends: 390 [2020-12-22 04:20:47,073 INFO L226 Difference]: Without dead ends: 388 [2020-12-22 04:20:47,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 11 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=537, Invalid=2325, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 04:20:47,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2020-12-22 04:20:47,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 233. [2020-12-22 04:20:47,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-12-22 04:20:47,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 285 transitions. [2020-12-22 04:20:47,135 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 285 transitions. Word has length 46 [2020-12-22 04:20:47,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:20:47,135 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 285 transitions. [2020-12-22 04:20:47,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 04:20:47,135 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 285 transitions. [2020-12-22 04:20:47,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 04:20:47,136 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:20:47,136 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:20:47,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 04:20:47,350 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:20:47,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:20:47,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1749185528, now seen corresponding path program 5 times [2020-12-22 04:20:47,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:20:47,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776870800] [2020-12-22 04:20:47,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:20:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:47,624 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 04:20:47,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776870800] [2020-12-22 04:20:47,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712333959] [2020-12-22 04:20:47,625 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:47,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-22 04:20:47,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:20:47,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 04:20:47,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:20:48,070 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:20:48,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:20:48,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 15 [2020-12-22 04:20:48,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026394898] [2020-12-22 04:20:48,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 04:20:48,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:20:48,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 04:20:48,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:20:48,072 INFO L87 Difference]: Start difference. First operand 233 states and 285 transitions. Second operand 15 states. [2020-12-22 04:20:48,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:20:48,752 INFO L93 Difference]: Finished difference Result 314 states and 377 transitions. [2020-12-22 04:20:48,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 04:20:48,752 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-12-22 04:20:48,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:20:48,753 INFO L225 Difference]: With dead ends: 314 [2020-12-22 04:20:48,753 INFO L226 Difference]: Without dead ends: 291 [2020-12-22 04:20:48,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:20:48,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-12-22 04:20:48,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 247. [2020-12-22 04:20:48,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-12-22 04:20:48,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 290 transitions. [2020-12-22 04:20:48,809 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 290 transitions. Word has length 47 [2020-12-22 04:20:48,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:20:48,809 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 290 transitions. [2020-12-22 04:20:48,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 04:20:48,809 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 290 transitions. [2020-12-22 04:20:48,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 04:20:48,810 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:20:48,810 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:20:49,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:49,014 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:20:49,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:20:49,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1783633389, now seen corresponding path program 3 times [2020-12-22 04:20:49,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:20:49,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028922340] [2020-12-22 04:20:49,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:20:49,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:50,876 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 5 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:50,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028922340] [2020-12-22 04:20:50,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915875322] [2020-12-22 04:20:50,877 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:51,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 04:20:51,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:20:51,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-22 04:20:51,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:20:51,295 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:51,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:51,335 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-22 04:20:51,337 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:51,349 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:51,350 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:20:51,351 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:20 [2020-12-22 04:20:51,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:51,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:51,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:51,542 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:51,543 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2020-12-22 04:20:51,545 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:51,564 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:51,567 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:20:51,567 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:20 [2020-12-22 04:20:51,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:51,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:51,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:51,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:51,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:51,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:51,751 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:51,751 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2020-12-22 04:20:51,753 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:51,766 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:51,767 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:20:51,768 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2020-12-22 04:20:51,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:51,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:51,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:51,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:51,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:51,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:52,113 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2020-12-22 04:20:52,114 INFO L348 Elim1Store]: treesize reduction 99, result has 63.1 percent of original size [2020-12-22 04:20:52,114 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 187 [2020-12-22 04:20:52,117 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:52,119 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:52,120 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:52,121 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-12-22 04:20:52,121 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:52,123 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:52,205 INFO L625 ElimStorePlain]: treesize reduction 115, result has 37.2 percent of original size [2020-12-22 04:20:52,206 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:20:52,206 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:68 [2020-12-22 04:20:52,616 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:20:52,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:52,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:52,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:52,632 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 04:20:52,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:52,635 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 04:20:52,644 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 04:20:52,647 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 04:20:52,650 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 43 [2020-12-22 04:20:52,652 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:52,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:52,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:52,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:52,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:52,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:52,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:52,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:52,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:52,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:52,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:52,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:52,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:52,890 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-12-22 04:20:52,891 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:52,892 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 75 treesize of output 309 [2020-12-22 04:20:52,896 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[7, 2, 1] term [2020-12-22 04:20:52,896 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 04:20:52,897 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 2, 1] term [2020-12-22 04:20:52,897 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-22 04:20:52,898 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 1] term [2020-12-22 04:20:52,898 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:20:52,899 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-12-22 04:20:52,899 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:20:52,899 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-12-22 04:20:52,900 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:20:52,900 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-12-22 04:20:52,900 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:52,902 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:20:52,903 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:20:52,903 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:52,910 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:53,341 WARN L197 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 48 [2020-12-22 04:20:53,342 INFO L625 ElimStorePlain]: treesize reduction 440, result has 30.4 percent of original size [2020-12-22 04:20:53,344 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-22 04:20:53,344 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:159, output treesize:192 [2020-12-22 04:20:53,808 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-12-22 04:20:54,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:54,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:54,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:54,040 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:54,041 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 32 [2020-12-22 04:20:54,042 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:54,054 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:54,056 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:20:54,056 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:19 [2020-12-22 04:20:54,347 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:54,349 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:54,351 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:54,426 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:20:54,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:20:54,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 42 [2020-12-22 04:20:54,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79088180] [2020-12-22 04:20:54,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 04:20:54,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:20:54,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 04:20:54,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1506, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:20:54,428 INFO L87 Difference]: Start difference. First operand 247 states and 290 transitions. Second operand 42 states. [2020-12-22 04:20:55,293 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2020-12-22 04:20:56,748 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 26 [2020-12-22 04:20:56,942 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-12-22 04:20:58,645 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-12-22 04:20:58,962 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 37 [2020-12-22 04:20:59,301 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-12-22 04:20:59,983 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2020-12-22 04:21:00,516 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2020-12-22 04:21:00,857 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 25 [2020-12-22 04:21:01,012 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 33 [2020-12-22 04:21:01,683 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2020-12-22 04:21:03,314 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 04:21:04,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:04,623 INFO L93 Difference]: Finished difference Result 491 states and 570 transitions. [2020-12-22 04:21:04,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-22 04:21:04,624 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 48 [2020-12-22 04:21:04,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:04,626 INFO L225 Difference]: With dead ends: 491 [2020-12-22 04:21:04,626 INFO L226 Difference]: Without dead ends: 425 [2020-12-22 04:21:04,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 30 SyntacticMatches, 9 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3383 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=1278, Invalid=9024, Unknown=0, NotChecked=0, Total=10302 [2020-12-22 04:21:04,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2020-12-22 04:21:04,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 279. [2020-12-22 04:21:04,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-12-22 04:21:04,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 329 transitions. [2020-12-22 04:21:04,708 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 329 transitions. Word has length 48 [2020-12-22 04:21:04,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:04,708 INFO L481 AbstractCegarLoop]: Abstraction has 279 states and 329 transitions. [2020-12-22 04:21:04,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 04:21:04,709 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 329 transitions. [2020-12-22 04:21:04,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 04:21:04,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:04,710 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:04,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-22 04:21:04,917 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:04,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:04,918 INFO L82 PathProgramCache]: Analyzing trace with hash -818040110, now seen corresponding path program 6 times [2020-12-22 04:21:04,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:04,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101828941] [2020-12-22 04:21:04,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:04,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:05,563 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2020-12-22 04:21:05,965 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:21:05,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101828941] [2020-12-22 04:21:05,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501914599] [2020-12-22 04:21:05,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:06,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-22 04:21:06,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:21:06,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 04:21:06,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:06,212 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-22 04:21:06,216 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:06,230 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:06,231 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:06,232 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2020-12-22 04:21:06,254 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:06,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:06,339 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2020-12-22 04:21:06,340 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:06,353 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:06,354 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:06,354 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2020-12-22 04:21:06,415 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 50 [2020-12-22 04:21:06,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:06,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:06,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:06,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:06,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:06,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:06,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:06,432 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 39 [2020-12-22 04:21:06,433 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:06,443 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:06,444 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:06,465 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:06,467 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. [2020-12-22 04:21:06,467 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:59 [2020-12-22 04:21:06,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:06,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:06,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:06,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:06,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:06,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:06,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:06,672 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:06,672 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 66 treesize of output 163 [2020-12-22 04:21:06,675 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:21:06,676 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:06,678 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:06,810 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2020-12-22 04:21:06,811 INFO L625 ElimStorePlain]: treesize reduction 128, result has 44.1 percent of original size [2020-12-22 04:21:06,813 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:21:06,814 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:21:06,815 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. [2020-12-22 04:21:06,815 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:84, output treesize:101 [2020-12-22 04:21:06,817 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:21:06,817 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:21:06,931 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:21:06,932 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:21:07,352 WARN L197 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-12-22 04:21:07,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:07,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:07,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:07,481 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:07,481 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 43 [2020-12-22 04:21:07,483 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:07,503 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:07,505 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 04:21:07,506 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:73, output treesize:36 [2020-12-22 04:21:07,825 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:07,828 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:07,830 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:07,831 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:07,832 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:21:07,895 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:21:07,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:21:07,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 27 [2020-12-22 04:21:07,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761695544] [2020-12-22 04:21:07,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 04:21:07,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:07,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 04:21:07,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:21:07,897 INFO L87 Difference]: Start difference. First operand 279 states and 329 transitions. Second operand 27 states. [2020-12-22 04:21:09,545 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 30 [2020-12-22 04:21:11,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:11,092 INFO L93 Difference]: Finished difference Result 454 states and 532 transitions. [2020-12-22 04:21:11,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 04:21:11,093 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 49 [2020-12-22 04:21:11,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:11,096 INFO L225 Difference]: With dead ends: 454 [2020-12-22 04:21:11,097 INFO L226 Difference]: Without dead ends: 362 [2020-12-22 04:21:11,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 36 SyntacticMatches, 9 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=256, Invalid=1636, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:21:11,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-12-22 04:21:11,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 331. [2020-12-22 04:21:11,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-12-22 04:21:11,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 389 transitions. [2020-12-22 04:21:11,211 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 389 transitions. Word has length 49 [2020-12-22 04:21:11,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:11,211 INFO L481 AbstractCegarLoop]: Abstraction has 331 states and 389 transitions. [2020-12-22 04:21:11,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 04:21:11,212 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 389 transitions. [2020-12-22 04:21:11,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 04:21:11,213 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:11,213 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:11,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:11,426 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:11,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:11,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1783487561, now seen corresponding path program 8 times [2020-12-22 04:21:11,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:11,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118754497] [2020-12-22 04:21:11,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:13,104 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:13,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118754497] [2020-12-22 04:21:13,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504526606] [2020-12-22 04:21:13,105 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:13,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:21:13,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:21:13,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 04:21:13,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:13,382 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:13,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:13,453 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-22 04:21:13,454 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:13,470 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:13,471 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:13,472 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2020-12-22 04:21:13,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:13,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:13,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:13,612 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:13,612 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2020-12-22 04:21:13,613 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:13,629 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:13,631 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:13,631 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:25 [2020-12-22 04:21:13,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:13,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:13,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:13,732 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:13,732 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2020-12-22 04:21:13,734 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:13,746 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:13,748 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:13,748 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2020-12-22 04:21:13,839 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 63 [2020-12-22 04:21:13,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:13,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:13,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:13,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:13,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:13,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:13,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:13,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:13,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:13,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:13,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:13,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:13,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:13,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:13,870 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 47 [2020-12-22 04:21:13,872 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:13,880 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:13,882 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:13,899 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:13,903 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:13,903 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:84, output treesize:46 [2020-12-22 04:21:13,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:13,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:13,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:13,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:13,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:13,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:13,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:14,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:14,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:14,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:14,006 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:14,006 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 50 [2020-12-22 04:21:14,009 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:14,025 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:14,026 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:14,026 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:35 [2020-12-22 04:21:14,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:14,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:14,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:14,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:14,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:14,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:14,129 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:14,130 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 41 [2020-12-22 04:21:14,133 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:14,145 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:14,147 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:14,147 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:17 [2020-12-22 04:21:14,219 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:14,220 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:14,222 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 04:21:14,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:21:14,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20] total 31 [2020-12-22 04:21:14,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997139700] [2020-12-22 04:21:14,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 04:21:14,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:14,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 04:21:14,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:21:14,291 INFO L87 Difference]: Start difference. First operand 331 states and 389 transitions. Second operand 31 states. [2020-12-22 04:21:17,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:17,775 INFO L93 Difference]: Finished difference Result 446 states and 523 transitions. [2020-12-22 04:21:17,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 04:21:17,777 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 49 [2020-12-22 04:21:17,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:17,779 INFO L225 Difference]: With dead ends: 446 [2020-12-22 04:21:17,779 INFO L226 Difference]: Without dead ends: 444 [2020-12-22 04:21:17,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 36 SyntacticMatches, 14 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=482, Invalid=2824, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 04:21:17,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2020-12-22 04:21:17,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 346. [2020-12-22 04:21:17,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346 states. [2020-12-22 04:21:17,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 410 transitions. [2020-12-22 04:21:17,858 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 410 transitions. Word has length 49 [2020-12-22 04:21:17,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:17,858 INFO L481 AbstractCegarLoop]: Abstraction has 346 states and 410 transitions. [2020-12-22 04:21:17,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 04:21:17,858 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 410 transitions. [2020-12-22 04:21:17,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 04:21:17,859 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:17,859 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:18,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 04:21:18,071 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:18,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:18,071 INFO L82 PathProgramCache]: Analyzing trace with hash -168081929, now seen corresponding path program 9 times [2020-12-22 04:21:18,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:18,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241648521] [2020-12-22 04:21:18,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:18,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:19,020 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:21:19,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241648521] [2020-12-22 04:21:19,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9129294] [2020-12-22 04:21:19,021 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:19,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 04:21:19,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:21:19,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 04:21:19,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:19,539 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:19,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:19,695 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2020-12-22 04:21:19,697 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:19,712 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:19,714 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:19,714 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:30 [2020-12-22 04:21:19,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:19,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:19,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:19,936 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:19,937 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2020-12-22 04:21:19,938 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:19,952 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:19,954 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:19,955 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:17 [2020-12-22 04:21:20,009 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:20,011 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:20,013 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:20,076 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 04:21:20,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:21:20,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 29 [2020-12-22 04:21:20,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824685993] [2020-12-22 04:21:20,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 04:21:20,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:20,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 04:21:20,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:21:20,078 INFO L87 Difference]: Start difference. First operand 346 states and 410 transitions. Second operand 29 states. [2020-12-22 04:21:23,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:23,168 INFO L93 Difference]: Finished difference Result 469 states and 551 transitions. [2020-12-22 04:21:23,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 04:21:23,170 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 49 [2020-12-22 04:21:23,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:23,171 INFO L225 Difference]: With dead ends: 469 [2020-12-22 04:21:23,171 INFO L226 Difference]: Without dead ends: 422 [2020-12-22 04:21:23,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=422, Invalid=2230, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 04:21:23,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-12-22 04:21:23,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 325. [2020-12-22 04:21:23,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-12-22 04:21:23,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 385 transitions. [2020-12-22 04:21:23,266 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 385 transitions. Word has length 49 [2020-12-22 04:21:23,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:23,266 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 385 transitions. [2020-12-22 04:21:23,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 04:21:23,266 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 385 transitions. [2020-12-22 04:21:23,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 04:21:23,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:23,267 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:23,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 04:21:23,468 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:23,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:23,468 INFO L82 PathProgramCache]: Analyzing trace with hash -626385949, now seen corresponding path program 7 times [2020-12-22 04:21:23,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:23,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529038639] [2020-12-22 04:21:23,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:23,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:24,203 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2020-12-22 04:21:24,805 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2020-12-22 04:21:25,292 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:25,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529038639] [2020-12-22 04:21:25,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035761364] [2020-12-22 04:21:25,292 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:25,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:25,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 04:21:25,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:25,517 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:25,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:25,559 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2020-12-22 04:21:25,561 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:25,585 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:25,586 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:25,586 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:45 [2020-12-22 04:21:25,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:25,930 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 04:21:25,933 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:25,933 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 44 [2020-12-22 04:21:25,935 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:25,988 INFO L625 ElimStorePlain]: treesize reduction 12, result has 76.9 percent of original size [2020-12-22 04:21:25,990 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 04:21:25,990 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:64, output treesize:37 [2020-12-22 04:21:26,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,199 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:26,200 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2020-12-22 04:21:26,202 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:26,225 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:26,228 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:26,228 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:25 [2020-12-22 04:21:26,444 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2020-12-22 04:21:26,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,472 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 34 [2020-12-22 04:21:26,474 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:26,486 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:26,487 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:26,513 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:26,515 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:26,516 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:32 [2020-12-22 04:21:26,620 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 62 [2020-12-22 04:21:26,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,659 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2020-12-22 04:21:26,661 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:26,673 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:26,674 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:26,695 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:26,697 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:26,697 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:84, output treesize:46 [2020-12-22 04:21:26,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:26,826 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:26,826 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 49 [2020-12-22 04:21:26,829 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:26,849 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:26,851 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:26,852 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:19 [2020-12-22 04:21:26,917 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:26,919 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:26,921 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:26,992 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 04:21:26,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:21:26,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 31 [2020-12-22 04:21:26,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994005773] [2020-12-22 04:21:26,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 04:21:26,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:26,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 04:21:26,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:21:26,993 INFO L87 Difference]: Start difference. First operand 325 states and 385 transitions. Second operand 31 states. [2020-12-22 04:21:30,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:30,420 INFO L93 Difference]: Finished difference Result 467 states and 556 transitions. [2020-12-22 04:21:30,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 04:21:30,421 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 49 [2020-12-22 04:21:30,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:30,424 INFO L225 Difference]: With dead ends: 467 [2020-12-22 04:21:30,425 INFO L226 Difference]: Without dead ends: 439 [2020-12-22 04:21:30,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 15 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=299, Invalid=2251, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 04:21:30,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2020-12-22 04:21:30,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 330. [2020-12-22 04:21:30,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-12-22 04:21:30,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 391 transitions. [2020-12-22 04:21:30,505 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 391 transitions. Word has length 49 [2020-12-22 04:21:30,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:30,506 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 391 transitions. [2020-12-22 04:21:30,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 04:21:30,506 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 391 transitions. [2020-12-22 04:21:30,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 04:21:30,507 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:30,507 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:30,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 04:21:30,719 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:30,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:30,719 INFO L82 PathProgramCache]: Analyzing trace with hash -877899863, now seen corresponding path program 8 times [2020-12-22 04:21:30,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:30,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506786862] [2020-12-22 04:21:30,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:30,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:31,392 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 24 [2020-12-22 04:21:32,700 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:32,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506786862] [2020-12-22 04:21:32,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113008438] [2020-12-22 04:21:32,700 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:32,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:21:32,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:21:32,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 04:21:32,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:32,977 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:33,094 INFO L348 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2020-12-22 04:21:33,095 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2020-12-22 04:21:33,097 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:33,122 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:33,124 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. [2020-12-22 04:21:33,125 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:49 [2020-12-22 04:21:33,598 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2020-12-22 04:21:33,599 INFO L348 Elim1Store]: treesize reduction 17, result has 85.8 percent of original size [2020-12-22 04:21:33,599 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 121 [2020-12-22 04:21:33,601 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:21:33,602 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:33,604 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:33,692 INFO L625 ElimStorePlain]: treesize reduction 99, result has 28.3 percent of original size [2020-12-22 04:21:33,695 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 04:21:33,695 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:68, output treesize:36 [2020-12-22 04:21:34,094 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:34,094 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 135 [2020-12-22 04:21:34,096 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:34,098 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:34,101 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:34,186 INFO L625 ElimStorePlain]: treesize reduction 73, result has 39.2 percent of original size [2020-12-22 04:21:34,189 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 04:21:34,189 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:51, output treesize:36 [2020-12-22 04:21:34,674 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-12-22 04:21:34,675 INFO L348 Elim1Store]: treesize reduction 75, result has 63.9 percent of original size [2020-12-22 04:21:34,675 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 147 [2020-12-22 04:21:34,678 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:34,681 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:34,684 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:34,783 INFO L625 ElimStorePlain]: treesize reduction 89, result has 40.7 percent of original size [2020-12-22 04:21:34,786 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 04:21:34,786 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:61 [2020-12-22 04:21:35,138 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2020-12-22 04:21:35,139 INFO L348 Elim1Store]: treesize reduction 107, result has 59.0 percent of original size [2020-12-22 04:21:35,139 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 9 case distinctions, treesize of input 58 treesize of output 172 [2020-12-22 04:21:35,142 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:21:35,143 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:35,145 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:21:35,145 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:35,150 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:35,242 INFO L625 ElimStorePlain]: treesize reduction 182, result has 20.9 percent of original size [2020-12-22 04:21:35,245 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 04:21:35,246 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:36 [2020-12-22 04:21:35,621 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:35,622 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 38 treesize of output 140 [2020-12-22 04:21:35,624 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:35,626 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:35,629 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:35,719 INFO L625 ElimStorePlain]: treesize reduction 65, result has 42.5 percent of original size [2020-12-22 04:21:35,723 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 04:21:35,724 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:52, output treesize:33 [2020-12-22 04:21:36,001 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:36,004 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:36,006 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:36,009 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:36,010 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:21:36,125 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 04:21:36,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:21:36,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20] total 44 [2020-12-22 04:21:36,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112657562] [2020-12-22 04:21:36,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 04:21:36,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:36,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 04:21:36,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1702, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:21:36,127 INFO L87 Difference]: Start difference. First operand 330 states and 391 transitions. Second operand 44 states. [2020-12-22 04:21:37,511 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2020-12-22 04:21:41,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:41,799 INFO L93 Difference]: Finished difference Result 471 states and 560 transitions. [2020-12-22 04:21:41,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 04:21:41,800 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 49 [2020-12-22 04:21:41,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:41,803 INFO L225 Difference]: With dead ends: 471 [2020-12-22 04:21:41,803 INFO L226 Difference]: Without dead ends: 469 [2020-12-22 04:21:41,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=513, Invalid=4043, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 04:21:41,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2020-12-22 04:21:41,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 321. [2020-12-22 04:21:41,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-12-22 04:21:41,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 380 transitions. [2020-12-22 04:21:41,912 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 380 transitions. Word has length 49 [2020-12-22 04:21:41,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:41,913 INFO L481 AbstractCegarLoop]: Abstraction has 321 states and 380 transitions. [2020-12-22 04:21:41,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 04:21:41,913 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 380 transitions. [2020-12-22 04:21:41,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 04:21:41,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:41,914 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:42,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 04:21:42,128 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:42,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:42,128 INFO L82 PathProgramCache]: Analyzing trace with hash 411790618, now seen corresponding path program 7 times [2020-12-22 04:21:42,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:42,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490102039] [2020-12-22 04:21:42,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:43,551 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:43,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490102039] [2020-12-22 04:21:43,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860206093] [2020-12-22 04:21:43,551 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:43,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:43,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 04:21:43,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:43,859 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-22 04:21:43,861 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:43,874 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:43,876 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:43,877 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2020-12-22 04:21:43,964 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:44,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:44,163 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2020-12-22 04:21:44,165 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:44,187 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:44,189 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:44,189 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:30 [2020-12-22 04:21:44,419 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 34 [2020-12-22 04:21:44,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:44,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:44,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:44,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:44,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:44,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:44,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:44,442 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 36 [2020-12-22 04:21:44,444 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:44,456 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:44,457 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:44,475 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:44,478 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:44,478 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2020-12-22 04:21:44,574 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 64 [2020-12-22 04:21:44,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:44,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:44,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:44,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:44,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:44,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:44,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:44,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:44,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:44,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:44,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:44,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:44,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:44,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:44,611 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 48 [2020-12-22 04:21:44,613 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:44,623 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:44,625 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:44,644 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:44,646 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:44,646 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:85, output treesize:47 [2020-12-22 04:21:44,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:44,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:44,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:44,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:44,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:44,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:44,757 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:44,757 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 43 [2020-12-22 04:21:44,759 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:44,770 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:44,772 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:44,772 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:19 [2020-12-22 04:21:44,993 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:44,995 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:44,997 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:45,063 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 04:21:45,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:21:45,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 31 [2020-12-22 04:21:45,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917323182] [2020-12-22 04:21:45,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 04:21:45,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:45,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 04:21:45,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:21:45,065 INFO L87 Difference]: Start difference. First operand 321 states and 380 transitions. Second operand 31 states. [2020-12-22 04:21:48,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:48,221 INFO L93 Difference]: Finished difference Result 397 states and 468 transitions. [2020-12-22 04:21:48,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 04:21:48,223 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 50 [2020-12-22 04:21:48,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:48,225 INFO L225 Difference]: With dead ends: 397 [2020-12-22 04:21:48,226 INFO L226 Difference]: Without dead ends: 395 [2020-12-22 04:21:48,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 33 SyntacticMatches, 15 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=390, Invalid=2472, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 04:21:48,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-12-22 04:21:48,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 326. [2020-12-22 04:21:48,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2020-12-22 04:21:48,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 388 transitions. [2020-12-22 04:21:48,321 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 388 transitions. Word has length 50 [2020-12-22 04:21:48,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:48,322 INFO L481 AbstractCegarLoop]: Abstraction has 326 states and 388 transitions. [2020-12-22 04:21:48,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 04:21:48,322 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 388 transitions. [2020-12-22 04:21:48,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 04:21:48,323 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:48,323 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:48,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 04:21:48,536 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:48,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:48,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1843245600, now seen corresponding path program 8 times [2020-12-22 04:21:48,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:48,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802919963] [2020-12-22 04:21:48,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:48,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:49,540 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:21:49,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802919963] [2020-12-22 04:21:49,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859706099] [2020-12-22 04:21:49,540 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:49,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:21:49,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:21:49,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 04:21:49,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:49,659 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:49,836 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:50,030 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-22 04:21:50,031 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2020-12-22 04:21:50,033 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:50,047 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:50,049 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:50,049 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2020-12-22 04:21:50,327 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2020-12-22 04:21:50,328 INFO L348 Elim1Store]: treesize reduction 12, result has 87.4 percent of original size [2020-12-22 04:21:50,328 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 32 treesize of output 98 [2020-12-22 04:21:50,331 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:50,334 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:50,336 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:50,338 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:50,386 INFO L625 ElimStorePlain]: treesize reduction 43, result has 41.9 percent of original size [2020-12-22 04:21:50,388 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:50,389 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:15 [2020-12-22 04:21:50,618 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:50,620 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:50,622 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:50,695 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 04:21:50,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:21:50,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 30 [2020-12-22 04:21:50,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107662215] [2020-12-22 04:21:50,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 04:21:50,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:50,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 04:21:50,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:21:50,696 INFO L87 Difference]: Start difference. First operand 326 states and 388 transitions. Second operand 30 states. [2020-12-22 04:21:53,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:53,323 INFO L93 Difference]: Finished difference Result 395 states and 469 transitions. [2020-12-22 04:21:53,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 04:21:53,325 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 50 [2020-12-22 04:21:53,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:53,327 INFO L225 Difference]: With dead ends: 395 [2020-12-22 04:21:53,327 INFO L226 Difference]: Without dead ends: 393 [2020-12-22 04:21:53,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=292, Invalid=1870, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 04:21:53,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-12-22 04:21:53,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 345. [2020-12-22 04:21:53,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-12-22 04:21:53,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 414 transitions. [2020-12-22 04:21:53,405 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 414 transitions. Word has length 50 [2020-12-22 04:21:53,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:53,405 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 414 transitions. [2020-12-22 04:21:53,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 04:21:53,405 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 414 transitions. [2020-12-22 04:21:53,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 04:21:53,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:53,406 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:53,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 04:21:53,607 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:53,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:53,608 INFO L82 PathProgramCache]: Analyzing trace with hash 508072344, now seen corresponding path program 4 times [2020-12-22 04:21:53,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:53,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777444394] [2020-12-22 04:21:53,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:53,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:54,337 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 19 [2020-12-22 04:21:54,506 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2020-12-22 04:21:54,667 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2020-12-22 04:21:55,865 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 7 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:55,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777444394] [2020-12-22 04:21:55,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662603345] [2020-12-22 04:21:55,865 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:55,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:21:55,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:21:55,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 04:21:55,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:56,272 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:56,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:56,481 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2020-12-22 04:21:56,483 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:56,504 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:56,505 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 04:21:56,506 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:30 [2020-12-22 04:21:56,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:56,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:21:56,759 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:56,759 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 162 [2020-12-22 04:21:56,762 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:21:56,763 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:56,772 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:21:56,773 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:56,773 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:56,775 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:56,778 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:56,783 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:56,934 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2020-12-22 04:21:56,935 INFO L625 ElimStorePlain]: treesize reduction 179, result has 26.6 percent of original size [2020-12-22 04:21:56,938 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:21:56,939 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:21:56,940 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:21:56,942 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 04:21:56,942 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:65 [2020-12-22 04:21:56,944 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:21:56,945 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:21:56,946 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:21:59,267 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:21:59,269 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:21:59,269 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:22:01,528 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:01,529 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:01,530 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:22:03,964 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:03,964 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:03,965 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:03,965 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-22 04:22:03,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:22:03,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:22:03,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:22:04,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:22:04,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:22:04,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:22:04,098 INFO L244 Elim1Store]: Index analysis took 119 ms [2020-12-22 04:22:04,278 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-12-22 04:22:04,279 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:22:04,280 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 66 treesize of output 297 [2020-12-22 04:22:04,284 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:22:04,284 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:22:04,285 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:04,285 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:22:04,287 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:22:04,287 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:22:04,288 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:04,288 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:04,288 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:04,288 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:22:04,291 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:04,291 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:22:04,293 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:04,294 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:22:04,306 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:22:04,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:22:04,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:22:04,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:22:04,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:22:04,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:22:04,352 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:22:04,353 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 92 [2020-12-22 04:22:04,355 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:22:04,885 WARN L197 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 64 [2020-12-22 04:22:04,887 INFO L625 ElimStorePlain]: treesize reduction 598, result has 26.6 percent of original size [2020-12-22 04:22:04,890 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:04,892 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:22:04,894 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:04,894 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:04,895 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:04,896 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:22:04,901 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:22:04,901 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:22:04,908 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:22:04,910 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:04,911 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:04,911 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:04,912 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:22:04,914 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2020-12-22 04:22:04,914 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:141, output treesize:217 [2020-12-22 04:22:04,917 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:04,917 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:22:04,918 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:04,919 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:04,919 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:04,920 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:22:04,921 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:22:04,921 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:22:04,922 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:22:04,922 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:04,923 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:04,923 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:04,924 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:22:05,175 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:05,176 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:22:05,177 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:05,178 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:05,178 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:05,179 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:22:05,181 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:22:05,182 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:22:05,184 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:22:05,185 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:05,185 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:05,186 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:22:05,187 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts