/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/list-ext3-properties/sll_nondet_insert-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:15:52,250 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:15:52,253 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:15:52,288 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:15:52,289 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:15:52,290 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:15:52,292 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:15:52,294 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:15:52,296 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:15:52,298 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:15:52,299 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:15:52,300 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:15:52,301 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:15:52,302 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:15:52,303 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:15:52,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:15:52,318 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:15:52,319 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:15:52,321 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:15:52,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:15:52,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:15:52,328 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:15:52,329 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:15:52,330 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:15:52,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:15:52,338 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 04:15:52,339 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 04:15:52,340 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 04:15:52,341 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 04:15:52,342 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 04:15:52,342 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 04:15:52,343 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 04:15:52,344 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 04:15:52,344 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:15:52,345 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:15:52,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:15:52,347 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:15:52,383 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:15:52,383 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:15:52,386 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:15:52,386 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:15:52,386 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:15:52,386 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:15:52,387 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:15:52,387 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:15:52,388 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:15:52,389 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:15:52,389 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:15:52,389 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:15:52,389 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:15:52,390 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:15:52,390 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:15:52,391 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:15:52,391 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:15:52,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:15:52,392 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:15:52,392 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:15:52,392 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:15:52,392 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:15:52,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:15:52,393 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:15:52,393 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:15:52,393 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:15:52,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:15:52,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:15:52,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:15:52,838 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:15:52,839 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:15:52,840 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i [2020-12-22 04:15:52,918 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b774d6c9/b257b72a057a4a99bb733cf2e675b5de/FLAGc7acb56a7 [2020-12-22 04:15:53,610 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:15:53,610 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i [2020-12-22 04:15:53,627 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b774d6c9/b257b72a057a4a99bb733cf2e675b5de/FLAGc7acb56a7 [2020-12-22 04:15:53,912 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b774d6c9/b257b72a057a4a99bb733cf2e675b5de [2020-12-22 04:15:53,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:15:53,921 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:15:53,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:15:53,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:15:53,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:15:53,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:15:53" (1/1) ... [2020-12-22 04:15:53,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2769fefa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:15:53, skipping insertion in model container [2020-12-22 04:15:53,933 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:15:53" (1/1) ... [2020-12-22 04:15:53,942 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:15:54,007 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:15:54,440 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/list-ext3-properties/sll_nondet_insert-1.i[24521,24534] [2020-12-22 04:15:54,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:15:54,472 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:15:54,570 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/list-ext3-properties/sll_nondet_insert-1.i[24521,24534] [2020-12-22 04:15:54,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:15:54,662 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:15:54,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:15:54 WrapperNode [2020-12-22 04:15:54,663 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:15:54,664 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:15:54,664 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:15:54,664 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:15:54,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:15:54" (1/1) ... [2020-12-22 04:15:54,742 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:15:54" (1/1) ... [2020-12-22 04:15:54,809 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:15:54,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:15:54,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:15:54,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:15:54,832 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:15:54" (1/1) ... [2020-12-22 04:15:54,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:15:54" (1/1) ... [2020-12-22 04:15:54,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:15:54" (1/1) ... [2020-12-22 04:15:54,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:15:54" (1/1) ... [2020-12-22 04:15:54,876 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:15:54" (1/1) ... [2020-12-22 04:15:54,888 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:15:54" (1/1) ... [2020-12-22 04:15:54,893 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:15:54" (1/1) ... [2020-12-22 04:15:54,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:15:54,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:15:54,903 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:15:54,903 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:15:54,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:15:54" (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 04:15:55,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 04:15:55,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 04:15:55,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:15:55,019 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 04:15:55,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 04:15:55,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 04:15:55,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:15:55,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:15:55,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:15:55,614 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:15:55,614 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2020-12-22 04:15:55,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:15:55 BoogieIcfgContainer [2020-12-22 04:15:55,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:15:55,618 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:15:55,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:15:55,622 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:15:55,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:15:53" (1/3) ... [2020-12-22 04:15:55,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@164282aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:15:55, skipping insertion in model container [2020-12-22 04:15:55,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:15:54" (2/3) ... [2020-12-22 04:15:55,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@164282aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:15:55, skipping insertion in model container [2020-12-22 04:15:55,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:15:55" (3/3) ... [2020-12-22 04:15:55,626 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-1.i [2020-12-22 04:15:55,633 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:15:55,639 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:15:55,658 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:15:55,687 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:15:55,687 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:15:55,687 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:15:55,687 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:15:55,688 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:15:55,688 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:15:55,688 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:15:55,688 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:15:55,704 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-12-22 04:15:55,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 04:15:55,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:15:55,711 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:15:55,712 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:15:55,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:15:55,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1240059524, now seen corresponding path program 1 times [2020-12-22 04:15:55,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:15:55,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418915335] [2020-12-22 04:15:55,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:15:55,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:15:55,899 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 04:15:55,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418915335] [2020-12-22 04:15:55,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:15:55,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 04:15:55,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420732720] [2020-12-22 04:15:55,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 04:15:55,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:15:55,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 04:15:55,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:15:55,940 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states. [2020-12-22 04:15:55,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:15:55,965 INFO L93 Difference]: Finished difference Result 89 states and 132 transitions. [2020-12-22 04:15:55,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 04:15:55,966 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2020-12-22 04:15:55,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:15:55,976 INFO L225 Difference]: With dead ends: 89 [2020-12-22 04:15:55,977 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 04:15:55,980 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 04:15:55,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 04:15:56,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-22 04:15:56,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 04:15:56,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2020-12-22 04:15:56,020 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 18 [2020-12-22 04:15:56,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:15:56,021 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2020-12-22 04:15:56,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 04:15:56,021 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2020-12-22 04:15:56,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 04:15:56,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:15:56,023 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:15:56,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:15:56,023 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:15:56,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:15:56,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1466688541, now seen corresponding path program 1 times [2020-12-22 04:15:56,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:15:56,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751437088] [2020-12-22 04:15:56,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:15:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:15:56,203 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 04:15:56,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751437088] [2020-12-22 04:15:56,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:15:56,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 04:15:56,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674754076] [2020-12-22 04:15:56,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:15:56,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:15:56,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:15:56,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:15:56,208 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 6 states. [2020-12-22 04:15:56,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:15:56,321 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2020-12-22 04:15:56,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:15:56,321 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-12-22 04:15:56,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:15:56,323 INFO L225 Difference]: With dead ends: 82 [2020-12-22 04:15:56,323 INFO L226 Difference]: Without dead ends: 53 [2020-12-22 04:15:56,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:15:56,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-22 04:15:56,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2020-12-22 04:15:56,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 04:15:56,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2020-12-22 04:15:56,334 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 25 [2020-12-22 04:15:56,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:15:56,335 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2020-12-22 04:15:56,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:15:56,335 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2020-12-22 04:15:56,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 04:15:56,337 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:15:56,337 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:15:56,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 04:15:56,338 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:15:56,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:15:56,339 INFO L82 PathProgramCache]: Analyzing trace with hash -395195180, now seen corresponding path program 1 times [2020-12-22 04:15:56,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:15:56,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241088924] [2020-12-22 04:15:56,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:15:56,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:15:56,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 04:15:56,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241088924] [2020-12-22 04:15:56,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:15:56,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 04:15:56,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185553234] [2020-12-22 04:15:56,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:15:56,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:15:56,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:15:56,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:15:56,527 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand 7 states. [2020-12-22 04:15:56,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:15:56,735 INFO L93 Difference]: Finished difference Result 115 states and 147 transitions. [2020-12-22 04:15:56,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:15:56,736 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-12-22 04:15:56,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:15:56,738 INFO L225 Difference]: With dead ends: 115 [2020-12-22 04:15:56,738 INFO L226 Difference]: Without dead ends: 88 [2020-12-22 04:15:56,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:15:56,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-22 04:15:56,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 54. [2020-12-22 04:15:56,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 04:15:56,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2020-12-22 04:15:56,759 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 28 [2020-12-22 04:15:56,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:15:56,759 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2020-12-22 04:15:56,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:15:56,760 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2020-12-22 04:15:56,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 04:15:56,763 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:15:56,763 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:15:56,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 04:15:56,764 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:15:56,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:15:56,765 INFO L82 PathProgramCache]: Analyzing trace with hash -982001194, now seen corresponding path program 1 times [2020-12-22 04:15:56,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:15:56,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003393849] [2020-12-22 04:15:56,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:15:56,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:15:56,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:15:56,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003393849] [2020-12-22 04:15:56,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102740260] [2020-12-22 04:15:56,925 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 04:15:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:15:57,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 04:15:57,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:15:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:15:57,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:15:57,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2020-12-22 04:15:57,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374482416] [2020-12-22 04:15:57,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:15:57,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:15:57,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:15:57,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:15:57,237 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand 7 states. [2020-12-22 04:15:57,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:15:57,331 INFO L93 Difference]: Finished difference Result 84 states and 105 transitions. [2020-12-22 04:15:57,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:15:57,333 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-12-22 04:15:57,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:15:57,334 INFO L225 Difference]: With dead ends: 84 [2020-12-22 04:15:57,334 INFO L226 Difference]: Without dead ends: 55 [2020-12-22 04:15:57,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:15:57,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-22 04:15:57,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-12-22 04:15:57,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 04:15:57,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2020-12-22 04:15:57,342 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 28 [2020-12-22 04:15:57,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:15:57,343 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2020-12-22 04:15:57,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:15:57,343 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2020-12-22 04:15:57,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 04:15:57,344 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:15:57,344 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:15:57,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:15:57,559 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:15:57,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:15:57,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1510946244, now seen corresponding path program 1 times [2020-12-22 04:15:57,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:15:57,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283100420] [2020-12-22 04:15:57,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:15:57,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:15:57,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:15:57,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283100420] [2020-12-22 04:15:57,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:15:57,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 04:15:57,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689965776] [2020-12-22 04:15:57,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:15:57,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:15:57,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:15:57,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:15:57,696 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 7 states. [2020-12-22 04:15:57,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:15:57,813 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2020-12-22 04:15:57,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:15:57,813 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-12-22 04:15:57,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:15:57,814 INFO L225 Difference]: With dead ends: 70 [2020-12-22 04:15:57,814 INFO L226 Difference]: Without dead ends: 65 [2020-12-22 04:15:57,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:15:57,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-22 04:15:57,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 47. [2020-12-22 04:15:57,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 04:15:57,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2020-12-22 04:15:57,823 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 29 [2020-12-22 04:15:57,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:15:57,824 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2020-12-22 04:15:57,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:15:57,824 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2020-12-22 04:15:57,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 04:15:57,825 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:15:57,825 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:15:57,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 04:15:57,826 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:15:57,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:15:57,826 INFO L82 PathProgramCache]: Analyzing trace with hash -353652332, now seen corresponding path program 1 times [2020-12-22 04:15:57,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:15:57,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128539454] [2020-12-22 04:15:57,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:15:57,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:15:57,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:15:57,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128539454] [2020-12-22 04:15:57,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106839008] [2020-12-22 04:15:57,965 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 04:15:58,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:15:58,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 04:15:58,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:15:58,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:15:58,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:15:58,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-12-22 04:15:58,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317524280] [2020-12-22 04:15:58,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:15:58,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:15:58,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:15:58,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:15:58,150 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand 11 states. [2020-12-22 04:15:58,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:15:58,368 INFO L93 Difference]: Finished difference Result 102 states and 130 transitions. [2020-12-22 04:15:58,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 04:15:58,369 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-12-22 04:15:58,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:15:58,369 INFO L225 Difference]: With dead ends: 102 [2020-12-22 04:15:58,370 INFO L226 Difference]: Without dead ends: 68 [2020-12-22 04:15:58,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:15:58,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-22 04:15:58,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-12-22 04:15:58,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 04:15:58,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2020-12-22 04:15:58,379 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 30 [2020-12-22 04:15:58,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:15:58,379 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2020-12-22 04:15:58,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:15:58,379 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2020-12-22 04:15:58,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 04:15:58,381 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:15:58,381 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:15:58,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:15:58,595 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:15:58,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:15:58,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1806454861, now seen corresponding path program 2 times [2020-12-22 04:15:58,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:15:58,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641059130] [2020-12-22 04:15:58,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:15:58,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:15:58,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:15:58,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641059130] [2020-12-22 04:15:58,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486709991] [2020-12-22 04:15:58,701 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 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 04:15:58,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:15:58,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:15:58,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 04:15:58,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:15:58,918 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-22 04:15:58,919 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:15:58,927 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:15:58,929 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 04:15:58,930 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:12 [2020-12-22 04:15:59,044 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-22 04:15:59,046 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:15:59,055 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:15:59,057 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 04:15:59,059 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:23 [2020-12-22 04:15:59,111 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:15:59,112 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2020-12-22 04:15:59,117 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:15:59,118 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:15:59,119 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 04:15:59,119 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:24, output treesize:4 [2020-12-22 04:15:59,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:15:59,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:15:59,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2020-12-22 04:15:59,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353163499] [2020-12-22 04:15:59,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 04:15:59,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:15:59,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 04:15:59,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:15:59,132 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand 14 states. [2020-12-22 04:15:59,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:15:59,433 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2020-12-22 04:15:59,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:15:59,434 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-12-22 04:15:59,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:15:59,435 INFO L225 Difference]: With dead ends: 75 [2020-12-22 04:15:59,435 INFO L226 Difference]: Without dead ends: 70 [2020-12-22 04:15:59,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:15:59,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-22 04:15:59,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-12-22 04:15:59,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 04:15:59,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2020-12-22 04:15:59,445 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 34 [2020-12-22 04:15:59,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:15:59,445 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2020-12-22 04:15:59,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 04:15:59,446 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2020-12-22 04:15:59,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 04:15:59,447 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:15:59,447 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:15:59,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:15:59,661 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:15:59,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:15:59,662 INFO L82 PathProgramCache]: Analyzing trace with hash 217180203, now seen corresponding path program 3 times [2020-12-22 04:15:59,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:15:59,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744940116] [2020-12-22 04:15:59,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:15:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:15:59,938 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 04:15:59,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744940116] [2020-12-22 04:15:59,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565637378] [2020-12-22 04:15:59,939 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 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 04:16:00,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 04:16:00,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:16:00,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 04:16:00,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:16:00,155 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 04:16:00,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:16:00,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-12-22 04:16:00,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670087273] [2020-12-22 04:16:00,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:16:00,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:16:00,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:16:00,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:16:00,158 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand 13 states. [2020-12-22 04:16:00,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:16:00,594 INFO L93 Difference]: Finished difference Result 213 states and 262 transitions. [2020-12-22 04:16:00,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 04:16:00,594 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-12-22 04:16:00,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:16:00,596 INFO L225 Difference]: With dead ends: 213 [2020-12-22 04:16:00,596 INFO L226 Difference]: Without dead ends: 205 [2020-12-22 04:16:00,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:16:00,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-12-22 04:16:00,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 97. [2020-12-22 04:16:00,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-22 04:16:00,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 125 transitions. [2020-12-22 04:16:00,637 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 125 transitions. Word has length 35 [2020-12-22 04:16:00,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:16:00,637 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 125 transitions. [2020-12-22 04:16:00,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:16:00,638 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 125 transitions. [2020-12-22 04:16:00,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 04:16:00,639 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:16:00,639 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:16:00,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:16:00,854 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:16:00,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:16:00,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1805693939, now seen corresponding path program 4 times [2020-12-22 04:16:00,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:16:00,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099739962] [2020-12-22 04:16:00,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:16:00,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:16:01,081 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:16:01,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099739962] [2020-12-22 04:16:01,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262641298] [2020-12-22 04:16:01,082 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 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 04:16:01,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:16:01,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:16:01,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-22 04:16:01,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:16:01,239 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 11 treesize of output 7 [2020-12-22 04:16:01,240 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:16:01,246 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:16:01,251 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 11 treesize of output 7 [2020-12-22 04:16:01,252 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:16:01,257 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:16:01,258 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:16:01,259 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2020-12-22 04:16:01,357 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:16:01,357 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 1 case distinctions, treesize of input 19 treesize of output 34 [2020-12-22 04:16:01,360 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:16:01,392 INFO L625 ElimStorePlain]: treesize reduction 16, result has 71.4 percent of original size [2020-12-22 04:16:01,406 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:16:01,407 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 1 case distinctions, treesize of input 19 treesize of output 34 [2020-12-22 04:16:01,410 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:16:01,438 INFO L625 ElimStorePlain]: treesize reduction 12, result has 76.9 percent of original size [2020-12-22 04:16:01,440 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:16:01,441 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:44, output treesize:45 [2020-12-22 04:16:01,621 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 04:16:01,718 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:16:01,835 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:16:01,850 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:16:01,908 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:16:01,909 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 96 treesize of output 134 [2020-12-22 04:16:01,913 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:16:01,938 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:16:01,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:16:02,003 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:16:02,004 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 8 case distinctions, treesize of input 96 treesize of output 169 [2020-12-22 04:16:02,008 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:16:02,025 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:16:02,030 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2020-12-22 04:16:02,030 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:239, output treesize:85 [2020-12-22 04:16:02,112 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:16:02,119 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 2, 1] term [2020-12-22 04:16:02,120 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:16:02,157 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:16:02,157 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 84 [2020-12-22 04:16:02,160 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:16:02,162 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:16:02,162 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 04:16:02,162 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:4 [2020-12-22 04:16:02,206 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:16:02,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:16:02,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2020-12-22 04:16:02,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343435836] [2020-12-22 04:16:02,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 04:16:02,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:16:02,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 04:16:02,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:16:02,208 INFO L87 Difference]: Start difference. First operand 97 states and 125 transitions. Second operand 22 states. [2020-12-22 04:16:02,750 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2020-12-22 04:16:02,997 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 69 [2020-12-22 04:16:03,210 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 69 [2020-12-22 04:16:03,415 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 64 [2020-12-22 04:16:03,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:16:03,615 INFO L93 Difference]: Finished difference Result 168 states and 212 transitions. [2020-12-22 04:16:03,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 04:16:03,616 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 36 [2020-12-22 04:16:03,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:16:03,617 INFO L225 Difference]: With dead ends: 168 [2020-12-22 04:16:03,617 INFO L226 Difference]: Without dead ends: 158 [2020-12-22 04:16:03,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:16:03,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-12-22 04:16:03,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 129. [2020-12-22 04:16:03,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-12-22 04:16:03,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 166 transitions. [2020-12-22 04:16:03,638 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 166 transitions. Word has length 36 [2020-12-22 04:16:03,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:16:03,639 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 166 transitions. [2020-12-22 04:16:03,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 04:16:03,639 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 166 transitions. [2020-12-22 04:16:03,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 04:16:03,641 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:16:03,641 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:16:03,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:16:03,855 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:16:03,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:16:03,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1169066102, now seen corresponding path program 1 times [2020-12-22 04:16:03,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:16:03,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783887563] [2020-12-22 04:16:03,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:16:03,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:16:03,924 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 04:16:03,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783887563] [2020-12-22 04:16:03,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998176944] [2020-12-22 04:16:03,924 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 04:16:04,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:16:04,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 04:16:04,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:16:04,125 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:16:04,127 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:16:04,148 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 04:16:04,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:16:04,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2020-12-22 04:16:04,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92087192] [2020-12-22 04:16:04,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:16:04,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:16:04,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:16:04,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:16:04,151 INFO L87 Difference]: Start difference. First operand 129 states and 166 transitions. Second operand 13 states. [2020-12-22 04:16:05,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:16:05,379 INFO L93 Difference]: Finished difference Result 556 states and 736 transitions. [2020-12-22 04:16:05,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-22 04:16:05,379 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-12-22 04:16:05,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:16:05,383 INFO L225 Difference]: With dead ends: 556 [2020-12-22 04:16:05,384 INFO L226 Difference]: Without dead ends: 470 [2020-12-22 04:16:05,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=433, Invalid=2323, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 04:16:05,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2020-12-22 04:16:05,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 174. [2020-12-22 04:16:05,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-12-22 04:16:05,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 219 transitions. [2020-12-22 04:16:05,445 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 219 transitions. Word has length 38 [2020-12-22 04:16:05,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:16:05,445 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 219 transitions. [2020-12-22 04:16:05,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:16:05,445 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 219 transitions. [2020-12-22 04:16:05,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 04:16:05,451 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:16:05,452 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:16:05,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:16:05,655 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:16:05,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:16:05,656 INFO L82 PathProgramCache]: Analyzing trace with hash -2055902770, now seen corresponding path program 1 times [2020-12-22 04:16:05,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:16:05,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191453387] [2020-12-22 04:16:05,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:16:05,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 04:16:05,681 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 04:16:05,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 04:16:05,704 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 04:16:05,735 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 04:16:05,735 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 04:16:05,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 04:16:05,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 04:16:05 BoogieIcfgContainer [2020-12-22 04:16:05,802 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 04:16:05,803 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 04:16:05,803 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 04:16:05,803 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 04:16:05,804 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:15:55" (3/4) ... [2020-12-22 04:16:05,807 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 04:16:05,912 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/list-ext3-properties/sll_nondet_insert-1.i-witness.graphml [2020-12-22 04:16:05,912 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 04:16:05,916 INFO L168 Benchmark]: Toolchain (without parser) took 11994.07 ms. Allocated memory was 152.0 MB in the beginning and 275.8 MB in the end (delta: 123.7 MB). Free memory was 126.9 MB in the beginning and 234.6 MB in the end (delta: -107.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 8.0 GB. [2020-12-22 04:16:05,916 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 152.0 MB. Free memory is still 124.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 04:16:05,917 INFO L168 Benchmark]: CACSL2BoogieTranslator took 738.25 ms. Allocated memory is still 152.0 MB. Free memory was 126.7 MB in the beginning and 103.5 MB in the end (delta: 23.2 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2020-12-22 04:16:05,917 INFO L168 Benchmark]: Boogie Procedure Inliner took 149.93 ms. Allocated memory is still 152.0 MB. Free memory was 103.3 MB in the beginning and 134.2 MB in the end (delta: -30.9 MB). Peak memory consumption was 3.8 MB. Max. memory is 8.0 GB. [2020-12-22 04:16:05,918 INFO L168 Benchmark]: Boogie Preprocessor took 83.80 ms. Allocated memory is still 152.0 MB. Free memory was 134.2 MB in the beginning and 132.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 04:16:05,918 INFO L168 Benchmark]: RCFGBuilder took 713.98 ms. Allocated memory is still 152.0 MB. Free memory was 132.6 MB in the beginning and 104.3 MB in the end (delta: 28.3 MB). Peak memory consumption was 28.3 MB. Max. memory is 8.0 GB. [2020-12-22 04:16:05,919 INFO L168 Benchmark]: TraceAbstraction took 10183.76 ms. Allocated memory was 152.0 MB in the beginning and 275.8 MB in the end (delta: 123.7 MB). Free memory was 103.8 MB in the beginning and 238.8 MB in the end (delta: -135.0 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 04:16:05,919 INFO L168 Benchmark]: Witness Printer took 109.38 ms. Allocated memory is still 275.8 MB. Free memory was 238.8 MB in the beginning and 234.6 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2020-12-22 04:16:05,922 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 152.0 MB. Free memory is still 124.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 738.25 ms. Allocated memory is still 152.0 MB. Free memory was 126.7 MB in the beginning and 103.5 MB in the end (delta: 23.2 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 149.93 ms. Allocated memory is still 152.0 MB. Free memory was 103.3 MB in the beginning and 134.2 MB in the end (delta: -30.9 MB). Peak memory consumption was 3.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 83.80 ms. Allocated memory is still 152.0 MB. Free memory was 134.2 MB in the beginning and 132.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 713.98 ms. Allocated memory is still 152.0 MB. Free memory was 132.6 MB in the beginning and 104.3 MB in the end (delta: 28.3 MB). Peak memory consumption was 28.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 10183.76 ms. Allocated memory was 152.0 MB in the beginning and 275.8 MB in the end (delta: 123.7 MB). Free memory was 103.8 MB in the beginning and 238.8 MB in the end (delta: -135.0 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 109.38 ms. Allocated memory is still 275.8 MB. Free memory was 238.8 MB in the beginning and 234.6 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 641]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L620] int len = from; [L621] len < until && __VERIFIER_nondet_int() [L621] len < until && __VERIFIER_nondet_int() [L621] COND FALSE !(len < until && __VERIFIER_nondet_int()) [L624] return len; [L627] const int len = _get_nondet_int(2, 5); [L628] SLL s = sll_create(len); [L575] SLL head = ((void *)0); [L576] EXPR len-- [L576] COND TRUE len-- > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) [L581] new_head->next = head [L582] head = new_head [L576] EXPR len-- [L576] COND TRUE len-- > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) [L581] new_head->next = head [L582] head = new_head [L576] EXPR len-- [L576] COND FALSE !(len-- > 0) [L584] return head; [L628] SLL s = sll_create(len); [L620] int len = from; [L621] len < until && __VERIFIER_nondet_int() [L621] len < until && __VERIFIER_nondet_int() [L621] COND TRUE len < until && __VERIFIER_nondet_int() [L622] len++ [L621] len < until && __VERIFIER_nondet_int() [L621] COND FALSE !(len < until && __VERIFIER_nondet_int()) [L624] return len; [L629] const int k = _get_nondet_int(0, len - 1); [L630] int i = 0; [L631] i < k && __VERIFIER_nondet_int() [L631] i < k && __VERIFIER_nondet_int() [L631] COND FALSE !(i < k && __VERIFIER_nondet_int()) [L636] EXPR \read(s) [L587] int len = 0; [L588] COND TRUE \read(head) [L589] len++ [L590] EXPR head->next [L590] head = head->next [L588] COND TRUE \read(head) [L589] len++ [L590] EXPR head->next [L590] head = head->next [L588] COND FALSE !(\read(head)) [L592] return len; [L636] COND TRUE k + len != sll_length(s) [L641] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 10.0s, OverallIterations: 11, TraceHistogramMax: 3, AutomataDifference: 4.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 504 SDtfs, 1957 SDslu, 3049 SDs, 0 SdLazy, 1454 SolverSat, 232 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 370 GetRequests, 194 SyntacticMatches, 4 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=174occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 539 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 540 NumberOfCodeBlocks, 536 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 486 ConstructedInterpolants, 4 QuantifiedInterpolants, 127263 SizeOfPredicates, 73 NumberOfNonLiveVariables, 1050 ConjunctsInSsa, 167 ConjunctsInUnsatCore, 16 InterpolantComputations, 5 PerfectInterpolantSequences, 61/113 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...