/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-DerefFreeMemtrack-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 18:56:17,900 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 18:56:17,903 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 18:56:17,940 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 18:56:17,941 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 18:56:17,944 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 18:56:17,946 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 18:56:17,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 18:56:17,951 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 18:56:17,952 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 18:56:17,954 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 18:56:17,955 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 18:56:17,956 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 18:56:17,957 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 18:56:17,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 18:56:17,960 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 18:56:17,981 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 18:56:17,982 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 18:56:17,984 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 18:56:17,987 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 18:56:17,989 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 18:56:17,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 18:56:17,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 18:56:17,994 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 18:56:17,997 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 18:56:18,001 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 18:56:18,002 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 18:56:18,003 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 18:56:18,004 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 18:56:18,006 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 18:56:18,006 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 18:56:18,007 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 18:56:18,007 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 18:56:18,008 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 18:56:18,009 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 18:56:18,010 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 18:56:18,015 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-22 18:56:18,052 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 18:56:18,052 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 18:56:18,055 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 18:56:18,056 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 18:56:18,056 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 18:56:18,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 18:56:18,056 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-22 18:56:18,057 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 18:56:18,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 18:56:18,057 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-22 18:56:18,058 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-22 18:56:18,059 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-22 18:56:18,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 18:56:18,059 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-22 18:56:18,060 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 18:56:18,060 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 18:56:18,060 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 18:56:18,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 18:56:18,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 18:56:18,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 18:56:18,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 18:56:18,062 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 18:56:18,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 18:56:18,062 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 18:56:18,063 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 18:56:18,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 18:56:18,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 18:56:18,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 18:56:18,545 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 18:56:18,546 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 18:56:18,547 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i [2020-12-22 18:56:18,630 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fb42452b/313c23edd8674bffad920a2c93b84a5d/FLAG308a693eb [2020-12-22 18:56:19,359 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 18:56:19,360 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i [2020-12-22 18:56:19,377 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fb42452b/313c23edd8674bffad920a2c93b84a5d/FLAG308a693eb [2020-12-22 18:56:19,634 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fb42452b/313c23edd8674bffad920a2c93b84a5d [2020-12-22 18:56:19,638 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 18:56:19,641 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 18:56:19,643 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 18:56:19,643 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 18:56:19,649 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 18:56:19,650 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:56:19" (1/1) ... [2020-12-22 18:56:19,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b8acefc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:19, skipping insertion in model container [2020-12-22 18:56:19,653 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:56:19" (1/1) ... [2020-12-22 18:56:19,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 18:56:19,702 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 18:56:19,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 18:56:20,011 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 18:56:20,057 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 18:56:20,120 INFO L208 MainTranslator]: Completed translation [2020-12-22 18:56:20,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:20 WrapperNode [2020-12-22 18:56:20,121 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 18:56:20,122 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 18:56:20,123 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 18:56:20,123 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 18:56:20,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:20" (1/1) ... [2020-12-22 18:56:20,148 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:20" (1/1) ... [2020-12-22 18:56:20,173 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 18:56:20,174 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 18:56:20,174 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 18:56:20,174 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 18:56:20,185 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:20" (1/1) ... [2020-12-22 18:56:20,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:20" (1/1) ... [2020-12-22 18:56:20,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:20" (1/1) ... [2020-12-22 18:56:20,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:20" (1/1) ... [2020-12-22 18:56:20,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:20" (1/1) ... [2020-12-22 18:56:20,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:20" (1/1) ... [2020-12-22 18:56:20,240 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:20" (1/1) ... [2020-12-22 18:56:20,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 18:56:20,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 18:56:20,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 18:56:20,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 18:56:20,255 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:20" (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 18:56:20,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 18:56:20,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 18:56:20,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 18:56:20,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 18:56:20,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 18:56:20,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 18:56:20,725 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 18:56:20,725 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-22 18:56:20,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:56:20 BoogieIcfgContainer [2020-12-22 18:56:20,727 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 18:56:20,729 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 18:56:20,729 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 18:56:20,733 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 18:56:20,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:56:19" (1/3) ... [2020-12-22 18:56:20,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2261cd7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:56:20, skipping insertion in model container [2020-12-22 18:56:20,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:20" (2/3) ... [2020-12-22 18:56:20,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2261cd7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:56:20, skipping insertion in model container [2020-12-22 18:56:20,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:56:20" (3/3) ... [2020-12-22 18:56:20,737 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrlen-alloca-2.i [2020-12-22 18:56:20,745 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 18:56:20,751 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-12-22 18:56:20,777 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-12-22 18:56:20,830 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 18:56:20,831 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-22 18:56:20,831 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 18:56:20,832 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 18:56:20,832 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 18:56:20,832 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 18:56:20,832 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 18:56:20,832 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 18:56:20,854 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-12-22 18:56:20,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 18:56:20,864 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:20,865 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 18:56:20,866 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:20,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:20,875 INFO L82 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2020-12-22 18:56:20,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:20,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706814464] [2020-12-22 18:56:20,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:21,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:21,266 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 18:56:21,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706814464] [2020-12-22 18:56:21,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:21,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 18:56:21,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982287682] [2020-12-22 18:56:21,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 18:56:21,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:21,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 18:56:21,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:56:21,305 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 4 states. [2020-12-22 18:56:21,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:21,389 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-12-22 18:56:21,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 18:56:21,391 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-22 18:56:21,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:21,421 INFO L225 Difference]: With dead ends: 40 [2020-12-22 18:56:21,421 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 18:56:21,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:56:21,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 18:56:21,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2020-12-22 18:56:21,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 18:56:21,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-12-22 18:56:21,480 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 6 [2020-12-22 18:56:21,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:21,481 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-12-22 18:56:21,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 18:56:21,481 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-12-22 18:56:21,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 18:56:21,481 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:21,482 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 18:56:21,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 18:56:21,483 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:21,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:21,488 INFO L82 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times [2020-12-22 18:56:21,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:21,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603729198] [2020-12-22 18:56:21,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:21,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:21,578 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 18:56:21,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603729198] [2020-12-22 18:56:21,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:21,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 18:56:21,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312572763] [2020-12-22 18:56:21,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 18:56:21,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:21,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 18:56:21,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 18:56:21,582 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 3 states. [2020-12-22 18:56:21,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:21,607 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-12-22 18:56:21,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 18:56:21,608 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-22 18:56:21,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:21,609 INFO L225 Difference]: With dead ends: 22 [2020-12-22 18:56:21,609 INFO L226 Difference]: Without dead ends: 22 [2020-12-22 18:56:21,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 18:56:21,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-22 18:56:21,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-22 18:56:21,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 18:56:21,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-22 18:56:21,619 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 6 [2020-12-22 18:56:21,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:21,619 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-22 18:56:21,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 18:56:21,620 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-22 18:56:21,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 18:56:21,622 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:21,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 18:56:21,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 18:56:21,623 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:21,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:21,624 INFO L82 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times [2020-12-22 18:56:21,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:21,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183230384] [2020-12-22 18:56:21,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:21,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:21,715 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 18:56:21,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183230384] [2020-12-22 18:56:21,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:21,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 18:56:21,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176577941] [2020-12-22 18:56:21,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 18:56:21,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:21,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 18:56:21,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:56:21,719 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 4 states. [2020-12-22 18:56:21,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:21,746 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-12-22 18:56:21,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 18:56:21,747 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-22 18:56:21,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:21,748 INFO L225 Difference]: With dead ends: 21 [2020-12-22 18:56:21,748 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 18:56:21,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:56:21,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 18:56:21,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-22 18:56:21,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 18:56:21,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-12-22 18:56:21,753 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 6 [2020-12-22 18:56:21,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:21,753 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-12-22 18:56:21,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 18:56:21,753 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-12-22 18:56:21,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 18:56:21,754 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:21,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 18:56:21,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 18:56:21,755 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:21,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:21,755 INFO L82 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2020-12-22 18:56:21,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:21,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149019401] [2020-12-22 18:56:21,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:21,831 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 18:56:21,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149019401] [2020-12-22 18:56:21,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:21,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 18:56:21,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6728825] [2020-12-22 18:56:21,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 18:56:21,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:21,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 18:56:21,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 18:56:21,834 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-12-22 18:56:21,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:21,906 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-12-22 18:56:21,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 18:56:21,909 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-12-22 18:56:21,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:21,910 INFO L225 Difference]: With dead ends: 35 [2020-12-22 18:56:21,910 INFO L226 Difference]: Without dead ends: 35 [2020-12-22 18:56:21,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 18:56:21,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-22 18:56:21,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 23. [2020-12-22 18:56:21,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 18:56:21,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-12-22 18:56:21,919 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 6 [2020-12-22 18:56:21,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:21,919 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-12-22 18:56:21,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 18:56:21,920 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-12-22 18:56:21,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 18:56:21,920 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:21,921 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:21,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 18:56:21,923 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:21,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:21,924 INFO L82 PathProgramCache]: Analyzing trace with hash 119484121, now seen corresponding path program 1 times [2020-12-22 18:56:21,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:21,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697827944] [2020-12-22 18:56:21,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:21,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:22,010 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 18:56:22,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697827944] [2020-12-22 18:56:22,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:22,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 18:56:22,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014215797] [2020-12-22 18:56:22,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 18:56:22,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:22,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 18:56:22,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:56:22,014 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 4 states. [2020-12-22 18:56:22,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:22,088 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-12-22 18:56:22,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 18:56:22,091 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-22 18:56:22,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:22,093 INFO L225 Difference]: With dead ends: 22 [2020-12-22 18:56:22,094 INFO L226 Difference]: Without dead ends: 22 [2020-12-22 18:56:22,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 18:56:22,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-22 18:56:22,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-22 18:56:22,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 18:56:22,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-12-22 18:56:22,108 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 8 [2020-12-22 18:56:22,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:22,109 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-12-22 18:56:22,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 18:56:22,109 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-12-22 18:56:22,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 18:56:22,110 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:22,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:22,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 18:56:22,110 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:22,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:22,111 INFO L82 PathProgramCache]: Analyzing trace with hash 119484122, now seen corresponding path program 1 times [2020-12-22 18:56:22,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:22,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736624434] [2020-12-22 18:56:22,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:22,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:22,216 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 18:56:22,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736624434] [2020-12-22 18:56:22,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:22,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 18:56:22,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278807320] [2020-12-22 18:56:22,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 18:56:22,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:22,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 18:56:22,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 18:56:22,222 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2020-12-22 18:56:22,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:22,313 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-12-22 18:56:22,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 18:56:22,314 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-22 18:56:22,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:22,315 INFO L225 Difference]: With dead ends: 28 [2020-12-22 18:56:22,315 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 18:56:22,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 18:56:22,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 18:56:22,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2020-12-22 18:56:22,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 18:56:22,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-12-22 18:56:22,319 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 8 [2020-12-22 18:56:22,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:22,319 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-12-22 18:56:22,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 18:56:22,319 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-12-22 18:56:22,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 18:56:22,320 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:22,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:22,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 18:56:22,321 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:22,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:22,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1139876333, now seen corresponding path program 1 times [2020-12-22 18:56:22,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:22,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346184755] [2020-12-22 18:56:22,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:22,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:22,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346184755] [2020-12-22 18:56:22,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:22,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 18:56:22,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594679444] [2020-12-22 18:56:22,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 18:56:22,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:22,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 18:56:22,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 18:56:22,475 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 7 states. [2020-12-22 18:56:22,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:22,577 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-12-22 18:56:22,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 18:56:22,577 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-12-22 18:56:22,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:22,578 INFO L225 Difference]: With dead ends: 31 [2020-12-22 18:56:22,578 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 18:56:22,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-22 18:56:22,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 18:56:22,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-12-22 18:56:22,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 18:56:22,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-12-22 18:56:22,582 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 10 [2020-12-22 18:56:22,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:22,583 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-12-22 18:56:22,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 18:56:22,583 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-12-22 18:56:22,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 18:56:22,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:22,586 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:22,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 18:56:22,586 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:22,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:22,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2020-12-22 18:56:22,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:22,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775324514] [2020-12-22 18:56:22,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:22,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:22,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:22,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775324514] [2020-12-22 18:56:22,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720334607] [2020-12-22 18:56:22,693 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 18:56:22,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:22,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 18:56:22,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:22,835 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2020-12-22 18:56:22,836 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:22,844 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:22,846 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:22,846 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-22 18:56:22,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:22,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:22,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 18:56:22,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448334214] [2020-12-22 18:56:22,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 18:56:22,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:22,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 18:56:22,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 18:56:22,900 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 6 states. [2020-12-22 18:56:22,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:22,974 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-12-22 18:56:22,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 18:56:22,975 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 18:56:22,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:22,976 INFO L225 Difference]: With dead ends: 38 [2020-12-22 18:56:22,976 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 18:56:22,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 18:56:22,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 18:56:22,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 24. [2020-12-22 18:56:22,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 18:56:22,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-12-22 18:56:22,980 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 10 [2020-12-22 18:56:22,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:22,980 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-12-22 18:56:22,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 18:56:22,981 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-12-22 18:56:22,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 18:56:22,981 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:22,981 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:23,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-22 18:56:23,195 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:23,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:23,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1949222959, now seen corresponding path program 1 times [2020-12-22 18:56:23,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:23,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370169752] [2020-12-22 18:56:23,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:23,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:23,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:23,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370169752] [2020-12-22 18:56:23,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:23,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 18:56:23,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139740156] [2020-12-22 18:56:23,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 18:56:23,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:23,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 18:56:23,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-22 18:56:23,377 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 8 states. [2020-12-22 18:56:23,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:23,534 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-12-22 18:56:23,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 18:56:23,535 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-12-22 18:56:23,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:23,535 INFO L225 Difference]: With dead ends: 36 [2020-12-22 18:56:23,536 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 18:56:23,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-12-22 18:56:23,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 18:56:23,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 25. [2020-12-22 18:56:23,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-22 18:56:23,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-12-22 18:56:23,540 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 10 [2020-12-22 18:56:23,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:23,540 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-12-22 18:56:23,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 18:56:23,540 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-12-22 18:56:23,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 18:56:23,541 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:23,541 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:23,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 18:56:23,542 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:23,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:23,543 INFO L82 PathProgramCache]: Analyzing trace with hash -204544928, now seen corresponding path program 1 times [2020-12-22 18:56:23,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:23,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441448289] [2020-12-22 18:56:23,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:23,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:23,601 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 18:56:23,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441448289] [2020-12-22 18:56:23,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:23,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 18:56:23,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990343179] [2020-12-22 18:56:23,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 18:56:23,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:23,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 18:56:23,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:56:23,605 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 4 states. [2020-12-22 18:56:23,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:23,621 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-12-22 18:56:23,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 18:56:23,622 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-22 18:56:23,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:23,623 INFO L225 Difference]: With dead ends: 24 [2020-12-22 18:56:23,623 INFO L226 Difference]: Without dead ends: 15 [2020-12-22 18:56:23,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:56:23,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-22 18:56:23,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-22 18:56:23,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-22 18:56:23,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-22 18:56:23,625 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-12-22 18:56:23,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:23,626 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-22 18:56:23,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 18:56:23,626 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-22 18:56:23,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 18:56:23,627 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:23,627 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:23,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 18:56:23,627 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:23,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:23,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1346179180, now seen corresponding path program 1 times [2020-12-22 18:56:23,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:23,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104086030] [2020-12-22 18:56:23,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:23,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104086030] [2020-12-22 18:56:23,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413002610] [2020-12-22 18:56:23,733 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 18:56:23,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:23,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 18:56:23,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:23,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:23,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:23,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-12-22 18:56:23,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329443255] [2020-12-22 18:56:23,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 18:56:23,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:23,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 18:56:23,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-12-22 18:56:23,925 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2020-12-22 18:56:24,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:24,055 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-12-22 18:56:24,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 18:56:24,055 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2020-12-22 18:56:24,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:24,056 INFO L225 Difference]: With dead ends: 21 [2020-12-22 18:56:24,056 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 18:56:24,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-12-22 18:56:24,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 18:56:24,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2020-12-22 18:56:24,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 18:56:24,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-12-22 18:56:24,063 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-12-22 18:56:24,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:24,063 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-12-22 18:56:24,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 18:56:24,063 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-12-22 18:56:24,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 18:56:24,064 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:24,064 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:24,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:24,279 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:24,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:24,280 INFO L82 PathProgramCache]: Analyzing trace with hash -893036467, now seen corresponding path program 2 times [2020-12-22 18:56:24,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:24,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973241961] [2020-12-22 18:56:24,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:24,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:24,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:24,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973241961] [2020-12-22 18:56:24,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356059674] [2020-12-22 18:56:24,536 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 18:56:24,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 18:56:24,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:56:24,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 18:56:24,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:24,674 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 14 treesize of output 10 [2020-12-22 18:56:24,675 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:24,683 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:24,690 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 18:56:24,691 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-22 18:56:24,941 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:24,942 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2020-12-22 18:56:24,944 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 18:56:24,957 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:24,962 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 18:56:24,968 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 18:56:24,972 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:24,972 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:27 [2020-12-22 18:56:25,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:25,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:25,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2020-12-22 18:56:25,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012076188] [2020-12-22 18:56:25,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 18:56:25,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:25,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 18:56:25,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-12-22 18:56:25,058 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 18 states. [2020-12-22 18:56:25,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:25,970 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2020-12-22 18:56:25,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 18:56:25,971 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 16 [2020-12-22 18:56:25,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:25,972 INFO L225 Difference]: With dead ends: 33 [2020-12-22 18:56:25,972 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 18:56:25,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 18:56:25,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 18:56:25,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2020-12-22 18:56:25,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 18:56:25,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-12-22 18:56:25,976 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 16 [2020-12-22 18:56:25,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:25,976 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-12-22 18:56:25,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 18:56:25,977 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-12-22 18:56:25,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 18:56:25,977 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:25,977 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:26,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 18:56:26,191 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:26,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:26,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1388594295, now seen corresponding path program 3 times [2020-12-22 18:56:26,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:26,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662116785] [2020-12-22 18:56:26,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:26,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:26,406 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:26,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662116785] [2020-12-22 18:56:26,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391467244] [2020-12-22 18:56:26,407 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 18:56:26,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 18:56:26,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:56:26,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 18:56:26,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:26,627 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 14 treesize of output 10 [2020-12-22 18:56:26,629 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:26,649 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:26,652 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 18:56:26,653 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 18:56:26,770 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 18:56:26,771 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:26,773 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:26,773 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 18:56:26,774 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-22 18:56:26,777 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:26,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:26,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-12-22 18:56:26,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67224867] [2020-12-22 18:56:26,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 18:56:26,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:26,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 18:56:26,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2020-12-22 18:56:26,779 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 19 states. [2020-12-22 18:56:27,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:27,193 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-12-22 18:56:27,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 18:56:27,198 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-12-22 18:56:27,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:27,199 INFO L225 Difference]: With dead ends: 38 [2020-12-22 18:56:27,199 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 18:56:27,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2020-12-22 18:56:27,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 18:56:27,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-12-22 18:56:27,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 18:56:27,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-12-22 18:56:27,202 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 22 [2020-12-22 18:56:27,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:27,202 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-12-22 18:56:27,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 18:56:27,203 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-12-22 18:56:27,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 18:56:27,203 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:27,204 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:27,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:27,408 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:27,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:27,409 INFO L82 PathProgramCache]: Analyzing trace with hash -954145076, now seen corresponding path program 4 times [2020-12-22 18:56:27,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:27,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545816574] [2020-12-22 18:56:27,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:27,609 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:27,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545816574] [2020-12-22 18:56:27,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676806863] [2020-12-22 18:56:27,610 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 18:56:27,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 18:56:27,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:56:27,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 18:56:27,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:27,684 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2020-12-22 18:56:27,684 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:27,690 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:27,693 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:27,694 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-22 18:56:27,799 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-22 18:56:27,800 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:27,807 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:27,808 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:27,809 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-12-22 18:56:28,011 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:28,012 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-12-22 18:56:28,014 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 18:56:28,027 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:28,028 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:28,028 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2020-12-22 18:56:28,125 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:28,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:28,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2020-12-22 18:56:28,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56272756] [2020-12-22 18:56:28,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 18:56:28,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:28,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 18:56:28,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-12-22 18:56:28,131 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 20 states. [2020-12-22 18:56:28,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:28,739 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2020-12-22 18:56:28,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 18:56:28,740 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 26 [2020-12-22 18:56:28,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:28,740 INFO L225 Difference]: With dead ends: 30 [2020-12-22 18:56:28,740 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 18:56:28,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-12-22 18:56:28,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 18:56:28,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-12-22 18:56:28,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 18:56:28,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-12-22 18:56:28,744 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-12-22 18:56:28,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:28,745 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-12-22 18:56:28,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 18:56:28,745 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-12-22 18:56:28,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 18:56:28,746 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:28,746 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:28,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 18:56:28,949 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:28,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:28,950 INFO L82 PathProgramCache]: Analyzing trace with hash -2105384571, now seen corresponding path program 5 times [2020-12-22 18:56:28,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:28,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747784471] [2020-12-22 18:56:28,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:28,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:29,207 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:29,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747784471] [2020-12-22 18:56:29,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116094413] [2020-12-22 18:56:29,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:56:29,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-22 18:56:29,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:56:29,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 18:56:29,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:29,417 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 14 treesize of output 10 [2020-12-22 18:56:29,418 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:29,423 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:29,425 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 18:56:29,425 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 18:56:29,564 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 18:56:29,565 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:29,566 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:29,567 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:29,567 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-22 18:56:29,572 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:29,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:29,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2020-12-22 18:56:29,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050141976] [2020-12-22 18:56:29,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 18:56:29,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:29,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 18:56:29,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2020-12-22 18:56:29,574 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 22 states. [2020-12-22 18:56:30,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:30,028 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-12-22 18:56:30,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 18:56:30,029 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 28 [2020-12-22 18:56:30,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:30,030 INFO L225 Difference]: With dead ends: 46 [2020-12-22 18:56:30,030 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 18:56:30,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2020-12-22 18:56:30,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 18:56:30,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-12-22 18:56:30,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 18:56:30,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-12-22 18:56:30,034 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2020-12-22 18:56:30,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:30,034 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-12-22 18:56:30,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 18:56:30,035 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-12-22 18:56:30,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 18:56:30,035 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:30,035 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:30,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:30,251 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:30,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:30,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1625083528, now seen corresponding path program 6 times [2020-12-22 18:56:30,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:30,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741113285] [2020-12-22 18:56:30,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:30,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741113285] [2020-12-22 18:56:30,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84441144] [2020-12-22 18:56:30,508 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:30,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-22 18:56:30,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:56:30,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 18:56:30,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:30,589 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2020-12-22 18:56:30,590 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:30,595 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:30,597 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:30,597 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-22 18:56:30,877 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:30,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:30,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2020-12-22 18:56:30,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568369228] [2020-12-22 18:56:30,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 18:56:30,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:30,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 18:56:30,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2020-12-22 18:56:30,880 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 24 states. [2020-12-22 18:56:31,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:31,383 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-12-22 18:56:31,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 18:56:31,384 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2020-12-22 18:56:31,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:31,385 INFO L225 Difference]: With dead ends: 36 [2020-12-22 18:56:31,385 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 18:56:31,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2020-12-22 18:56:31,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 18:56:31,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-12-22 18:56:31,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-22 18:56:31,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-12-22 18:56:31,389 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-12-22 18:56:31,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:31,389 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-12-22 18:56:31,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 18:56:31,389 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-12-22 18:56:31,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 18:56:31,390 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:31,390 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:31,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 18:56:31,603 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:31,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:31,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1662825919, now seen corresponding path program 7 times [2020-12-22 18:56:31,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:31,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32325806] [2020-12-22 18:56:31,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:31,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:31,919 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:31,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32325806] [2020-12-22 18:56:31,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459596689] [2020-12-22 18:56:31,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:31,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:31,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 18:56:31,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:32,197 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 14 treesize of output 10 [2020-12-22 18:56:32,198 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:32,204 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:32,206 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 18:56:32,206 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 18:56:32,343 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 18:56:32,345 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:32,346 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:32,347 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 18:56:32,347 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-22 18:56:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:32,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:32,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2020-12-22 18:56:32,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503837132] [2020-12-22 18:56:32,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 18:56:32,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:32,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 18:56:32,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2020-12-22 18:56:32,354 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 25 states. [2020-12-22 18:56:32,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:32,947 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2020-12-22 18:56:32,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 18:56:32,947 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 34 [2020-12-22 18:56:32,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:32,948 INFO L225 Difference]: With dead ends: 54 [2020-12-22 18:56:32,949 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 18:56:32,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 18:56:32,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 18:56:32,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2020-12-22 18:56:32,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 18:56:32,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-12-22 18:56:32,953 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2020-12-22 18:56:32,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:32,953 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-12-22 18:56:32,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 18:56:32,954 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-12-22 18:56:32,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 18:56:32,955 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:32,955 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:33,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 18:56:33,165 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:33,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:33,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1974118660, now seen corresponding path program 8 times [2020-12-22 18:56:33,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:33,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956282951] [2020-12-22 18:56:33,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:33,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:33,419 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:33,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956282951] [2020-12-22 18:56:33,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388647642] [2020-12-22 18:56:33,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:33,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 18:56:33,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:56:33,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 18:56:33,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:33,763 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:33,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:33,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2020-12-22 18:56:33,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413235863] [2020-12-22 18:56:33,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 18:56:33,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:33,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 18:56:33,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2020-12-22 18:56:33,765 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 24 states. [2020-12-22 18:56:34,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:34,194 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2020-12-22 18:56:34,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 18:56:34,194 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 38 [2020-12-22 18:56:34,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:34,195 INFO L225 Difference]: With dead ends: 42 [2020-12-22 18:56:34,195 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 18:56:34,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2020-12-22 18:56:34,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 18:56:34,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-12-22 18:56:34,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-22 18:56:34,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-12-22 18:56:34,206 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-12-22 18:56:34,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:34,207 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-12-22 18:56:34,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 18:56:34,207 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-12-22 18:56:34,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 18:56:34,210 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:34,210 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:34,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 18:56:34,412 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:34,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:34,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1247513155, now seen corresponding path program 9 times [2020-12-22 18:56:34,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:34,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005243872] [2020-12-22 18:56:34,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:34,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:34,734 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:34,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005243872] [2020-12-22 18:56:34,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796681967] [2020-12-22 18:56:34,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:34,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-22 18:56:34,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:56:34,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 18:56:34,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:35,108 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 14 treesize of output 10 [2020-12-22 18:56:35,109 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:35,115 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:35,117 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 18:56:35,117 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 18:56:35,273 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 18:56:35,274 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:35,276 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:35,278 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 18:56:35,278 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-22 18:56:35,284 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:35,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:35,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2020-12-22 18:56:35,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951449695] [2020-12-22 18:56:35,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 18:56:35,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:35,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 18:56:35,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2020-12-22 18:56:35,286 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 28 states. [2020-12-22 18:56:36,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:36,053 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2020-12-22 18:56:36,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 18:56:36,054 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 40 [2020-12-22 18:56:36,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:36,054 INFO L225 Difference]: With dead ends: 62 [2020-12-22 18:56:36,054 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 18:56:36,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 18:56:36,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 18:56:36,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-12-22 18:56:36,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 18:56:36,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-12-22 18:56:36,058 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 40 [2020-12-22 18:56:36,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:36,058 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-12-22 18:56:36,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 18:56:36,058 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-12-22 18:56:36,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 18:56:36,059 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:36,059 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:36,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:36,272 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:36,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:36,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1917613632, now seen corresponding path program 10 times [2020-12-22 18:56:36,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:36,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150854212] [2020-12-22 18:56:36,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:36,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:36,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150854212] [2020-12-22 18:56:36,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887577418] [2020-12-22 18:56:36,533 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:36,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 18:56:36,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:56:36,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-22 18:56:36,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:36,647 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2020-12-22 18:56:36,648 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:36,654 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:36,654 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:36,655 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-22 18:56:36,758 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-22 18:56:36,758 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:36,765 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:36,765 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:36,765 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-12-22 18:56:37,115 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:37,115 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-12-22 18:56:37,116 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 18:56:37,128 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:37,135 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:37,136 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2020-12-22 18:56:37,254 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 50 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:37,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:37,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2020-12-22 18:56:37,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125325162] [2020-12-22 18:56:37,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 18:56:37,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:37,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 18:56:37,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=737, Unknown=0, NotChecked=0, Total=812 [2020-12-22 18:56:37,256 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 29 states. [2020-12-22 18:56:38,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:38,491 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2020-12-22 18:56:38,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 18:56:38,492 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 44 [2020-12-22 18:56:38,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:38,493 INFO L225 Difference]: With dead ends: 48 [2020-12-22 18:56:38,493 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 18:56:38,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=249, Invalid=1311, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 18:56:38,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 18:56:38,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-12-22 18:56:38,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 18:56:38,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-12-22 18:56:38,497 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-12-22 18:56:38,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:38,497 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-12-22 18:56:38,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 18:56:38,498 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-12-22 18:56:38,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 18:56:38,498 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:38,499 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:38,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:38,711 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:38,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:38,712 INFO L82 PathProgramCache]: Analyzing trace with hash 285729785, now seen corresponding path program 11 times [2020-12-22 18:56:38,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:38,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385214577] [2020-12-22 18:56:38,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:38,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:39,123 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:39,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385214577] [2020-12-22 18:56:39,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755763805] [2020-12-22 18:56:39,124 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:39,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-22 18:56:39,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:56:39,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-22 18:56:39,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:39,554 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 14 treesize of output 10 [2020-12-22 18:56:39,554 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:39,560 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:39,566 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 18:56:39,566 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 18:56:39,716 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 18:56:39,717 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:39,719 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:39,720 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 18:56:39,720 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-22 18:56:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:39,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:39,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 31 [2020-12-22 18:56:39,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664382749] [2020-12-22 18:56:39,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 18:56:39,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:39,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 18:56:39,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=857, Unknown=0, NotChecked=0, Total=930 [2020-12-22 18:56:39,729 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 31 states. [2020-12-22 18:56:40,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:40,766 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-12-22 18:56:40,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 18:56:40,767 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 46 [2020-12-22 18:56:40,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:40,768 INFO L225 Difference]: With dead ends: 70 [2020-12-22 18:56:40,768 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 18:56:40,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=187, Invalid=1535, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 18:56:40,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 18:56:40,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-12-22 18:56:40,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 18:56:40,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-12-22 18:56:40,773 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 46 [2020-12-22 18:56:40,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:40,774 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-12-22 18:56:40,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 18:56:40,774 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-12-22 18:56:40,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 18:56:40,775 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:40,775 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:40,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:40,989 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:40,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:40,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1048562116, now seen corresponding path program 12 times [2020-12-22 18:56:40,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:40,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851269364] [2020-12-22 18:56:40,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:41,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:41,333 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 45 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:41,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851269364] [2020-12-22 18:56:41,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416522085] [2020-12-22 18:56:41,334 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:41,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-22 18:56:41,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:56:41,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 18:56:41,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:41,448 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2020-12-22 18:56:41,448 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:41,453 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:41,454 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:41,454 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-22 18:56:42,115 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 66 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:42,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:42,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2020-12-22 18:56:42,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008508738] [2020-12-22 18:56:42,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 18:56:42,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:42,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 18:56:42,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 18:56:42,117 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 36 states. [2020-12-22 18:56:43,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:43,180 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2020-12-22 18:56:43,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 18:56:43,181 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 50 [2020-12-22 18:56:43,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:43,182 INFO L225 Difference]: With dead ends: 54 [2020-12-22 18:56:43,182 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 18:56:43,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=386, Invalid=1594, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 18:56:43,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 18:56:43,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-12-22 18:56:43,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 18:56:43,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-12-22 18:56:43,186 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-12-22 18:56:43,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:43,186 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-12-22 18:56:43,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 18:56:43,187 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-12-22 18:56:43,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 18:56:43,187 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:43,187 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:43,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 18:56:43,401 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:43,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:43,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1649120501, now seen corresponding path program 13 times [2020-12-22 18:56:43,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:43,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975297011] [2020-12-22 18:56:43,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:43,862 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 8 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:43,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975297011] [2020-12-22 18:56:43,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267589863] [2020-12-22 18:56:43,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:43,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:43,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-22 18:56:43,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:44,249 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 14 treesize of output 10 [2020-12-22 18:56:44,250 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:44,256 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:44,258 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 18:56:44,258 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-22 18:56:45,052 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:45,053 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2020-12-22 18:56:45,054 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 18:56:45,068 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:45,071 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 18:56:45,073 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 18:56:45,075 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 18:56:45,075 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:27 [2020-12-22 18:56:45,219 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 66 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:45,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:45,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 42 [2020-12-22 18:56:45,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064981695] [2020-12-22 18:56:45,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 18:56:45,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:45,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 18:56:45,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1587, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 18:56:45,222 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 42 states. [2020-12-22 18:56:48,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:48,819 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2020-12-22 18:56:48,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 18:56:48,820 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 52 [2020-12-22 18:56:48,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:48,821 INFO L225 Difference]: With dead ends: 81 [2020-12-22 18:56:48,821 INFO L226 Difference]: Without dead ends: 63 [2020-12-22 18:56:48,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=578, Invalid=3978, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 18:56:48,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-22 18:56:48,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2020-12-22 18:56:48,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 18:56:48,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-12-22 18:56:48,825 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 52 [2020-12-22 18:56:48,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:48,826 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-12-22 18:56:48,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 18:56:48,826 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-12-22 18:56:48,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 18:56:48,826 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:48,827 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:49,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:49,031 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:49,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:49,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1873381553, now seen corresponding path program 14 times [2020-12-22 18:56:49,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:49,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194535463] [2020-12-22 18:56:49,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:49,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:49,590 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 9 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:49,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194535463] [2020-12-22 18:56:49,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677338140] [2020-12-22 18:56:49,590 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:49,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 18:56:49,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:56:49,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-22 18:56:49,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:50,052 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 14 treesize of output 10 [2020-12-22 18:56:50,053 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:50,059 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:50,062 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 18:56:50,062 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-22 18:56:51,085 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:51,085 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2020-12-22 18:56:51,087 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 18:56:51,105 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:51,107 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 18:56:51,109 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 18:56:51,111 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 18:56:51,112 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:27 [2020-12-22 18:56:51,290 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 91 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:51,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:51,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 46 [2020-12-22 18:56:51,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456104610] [2020-12-22 18:56:51,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 18:56:51,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:51,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 18:56:51,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1912, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 18:56:51,293 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 46 states. [2020-12-22 18:57:01,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:01,425 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2020-12-22 18:57:01,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 18:57:01,425 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 58 [2020-12-22 18:57:01,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:01,426 INFO L225 Difference]: With dead ends: 89 [2020-12-22 18:57:01,426 INFO L226 Difference]: Without dead ends: 69 [2020-12-22 18:57:01,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=665, Invalid=4737, Unknown=0, NotChecked=0, Total=5402 [2020-12-22 18:57:01,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-22 18:57:01,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2020-12-22 18:57:01,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-22 18:57:01,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-12-22 18:57:01,430 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 58 [2020-12-22 18:57:01,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:01,431 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-12-22 18:57:01,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 18:57:01,431 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-12-22 18:57:01,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 18:57:01,432 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:01,432 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:01,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 18:57:01,646 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:57:01,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:01,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1985462061, now seen corresponding path program 15 times [2020-12-22 18:57:01,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:01,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781947063] [2020-12-22 18:57:01,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:01,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:02,315 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 10 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:02,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781947063] [2020-12-22 18:57:02,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681753877] [2020-12-22 18:57:02,315 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:02,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-12-22 18:57:02,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:02,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-22 18:57:02,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:03,041 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 14 treesize of output 10 [2020-12-22 18:57:03,042 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:03,048 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:03,050 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 18:57:03,050 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 18:57:03,270 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 18:57:03,271 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:03,273 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:03,273 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 18:57:03,273 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-22 18:57:03,284 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 10 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:03,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:03,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 40 [2020-12-22 18:57:03,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273504756] [2020-12-22 18:57:03,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 18:57:03,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:03,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 18:57:03,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1466, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 18:57:03,287 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 40 states. [2020-12-22 18:57:05,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:05,098 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-12-22 18:57:05,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 18:57:05,099 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 64 [2020-12-22 18:57:05,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:05,100 INFO L225 Difference]: With dead ends: 94 [2020-12-22 18:57:05,100 INFO L226 Difference]: Without dead ends: 72 [2020-12-22 18:57:05,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=241, Invalid=2621, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 18:57:05,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-22 18:57:05,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2020-12-22 18:57:05,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-22 18:57:05,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-12-22 18:57:05,105 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 64 [2020-12-22 18:57:05,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:05,106 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-12-22 18:57:05,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 18:57:05,106 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-12-22 18:57:05,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 18:57:05,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:05,106 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:05,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:05,314 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:57:05,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:05,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1605838512, now seen corresponding path program 16 times [2020-12-22 18:57:05,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:05,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327573254] [2020-12-22 18:57:05,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:05,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:05,888 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 120 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:05,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327573254] [2020-12-22 18:57:05,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383293349] [2020-12-22 18:57:05,888 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:05,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 18:57:05,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:05,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-22 18:57:05,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:05,990 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2020-12-22 18:57:05,991 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:05,998 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:05,998 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:05,998 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-22 18:57:06,136 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-22 18:57:06,137 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:06,144 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:06,145 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:06,145 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-12-22 18:57:07,006 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:07,007 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-12-22 18:57:07,012 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 18:57:07,024 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:07,025 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:07,025 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2020-12-22 18:57:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 162 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:07,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:07,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 40 [2020-12-22 18:57:07,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287369610] [2020-12-22 18:57:07,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 18:57:07,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:07,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 18:57:07,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1511, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 18:57:07,223 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 41 states. [2020-12-22 18:57:09,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:09,868 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2020-12-22 18:57:09,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 18:57:09,868 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 68 [2020-12-22 18:57:09,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:09,869 INFO L225 Difference]: With dead ends: 72 [2020-12-22 18:57:09,869 INFO L226 Difference]: Without dead ends: 72 [2020-12-22 18:57:09,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=435, Invalid=2645, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 18:57:09,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-22 18:57:09,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-12-22 18:57:09,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-22 18:57:09,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-12-22 18:57:09,874 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2020-12-22 18:57:09,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:09,874 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-12-22 18:57:09,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 18:57:09,874 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-12-22 18:57:09,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 18:57:09,875 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:09,875 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:10,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 18:57:10,078 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:57:10,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:10,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1317550185, now seen corresponding path program 17 times [2020-12-22 18:57:10,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:10,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047457991] [2020-12-22 18:57:10,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:10,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:10,838 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 11 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:10,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047457991] [2020-12-22 18:57:10,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613084034] [2020-12-22 18:57:10,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:10,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-22 18:57:10,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:10,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-22 18:57:10,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:11,636 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 14 treesize of output 10 [2020-12-22 18:57:11,637 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:11,645 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:11,646 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 18:57:11,646 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 18:57:11,889 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 18:57:11,890 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:11,892 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:11,895 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 18:57:11,895 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-22 18:57:11,904 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 11 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:11,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:11,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 43 [2020-12-22 18:57:11,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624723135] [2020-12-22 18:57:11,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 18:57:11,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:11,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 18:57:11,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1705, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 18:57:11,906 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 43 states. [2020-12-22 18:57:14,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:14,115 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2020-12-22 18:57:14,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 18:57:14,116 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 70 [2020-12-22 18:57:14,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:14,117 INFO L225 Difference]: With dead ends: 102 [2020-12-22 18:57:14,117 INFO L226 Difference]: Without dead ends: 78 [2020-12-22 18:57:14,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=259, Invalid=3047, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 18:57:14,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-22 18:57:14,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2020-12-22 18:57:14,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-22 18:57:14,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-12-22 18:57:14,122 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 70 [2020-12-22 18:57:14,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:14,122 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-12-22 18:57:14,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 18:57:14,122 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-12-22 18:57:14,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 18:57:14,123 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:14,123 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:14,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 18:57:14,326 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:57:14,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:14,326 INFO L82 PathProgramCache]: Analyzing trace with hash 676245932, now seen corresponding path program 18 times [2020-12-22 18:57:14,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:14,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241035503] [2020-12-22 18:57:14,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:14,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:15,022 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 153 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:15,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241035503] [2020-12-22 18:57:15,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299769604] [2020-12-22 18:57:15,023 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:15,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-12-22 18:57:15,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:15,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-22 18:57:15,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:15,239 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2020-12-22 18:57:15,240 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:15,248 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:15,249 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:15,249 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-22 18:57:16,624 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 190 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:16,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:16,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 51 [2020-12-22 18:57:16,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820106756] [2020-12-22 18:57:16,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-22 18:57:16,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:16,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-22 18:57:16,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=2314, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 18:57:16,626 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 52 states. [2020-12-22 18:57:18,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:18,840 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2020-12-22 18:57:18,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 18:57:18,840 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 74 [2020-12-22 18:57:18,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:18,841 INFO L225 Difference]: With dead ends: 78 [2020-12-22 18:57:18,842 INFO L226 Difference]: Without dead ends: 78 [2020-12-22 18:57:18,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=788, Invalid=3372, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 18:57:18,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-22 18:57:18,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-12-22 18:57:18,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-22 18:57:18,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-12-22 18:57:18,846 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2020-12-22 18:57:18,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:18,846 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-12-22 18:57:18,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-22 18:57:18,846 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-12-22 18:57:18,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 18:57:18,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:18,847 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:19,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 18:57:19,061 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:57:19,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:19,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1332278373, now seen corresponding path program 19 times [2020-12-22 18:57:19,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:19,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847502698] [2020-12-22 18:57:19,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:19,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:19,946 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 12 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:19,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847502698] [2020-12-22 18:57:19,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735652702] [2020-12-22 18:57:19,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:20,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:20,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 87 conjunts are in the unsatisfiable core [2020-12-22 18:57:20,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:20,857 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 14 treesize of output 10 [2020-12-22 18:57:20,858 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:20,867 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:20,868 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 18:57:20,869 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 18:57:21,130 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 18:57:21,133 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:21,135 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:21,135 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 18:57:21,135 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-22 18:57:21,147 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 12 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:21,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:21,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 46 [2020-12-22 18:57:21,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86120775] [2020-12-22 18:57:21,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 18:57:21,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:21,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 18:57:21,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1962, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 18:57:21,149 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 46 states. [2020-12-22 18:57:23,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:23,746 INFO L93 Difference]: Finished difference Result 110 states and 111 transitions. [2020-12-22 18:57:23,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 18:57:23,746 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 76 [2020-12-22 18:57:23,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:23,747 INFO L225 Difference]: With dead ends: 110 [2020-12-22 18:57:23,747 INFO L226 Difference]: Without dead ends: 84 [2020-12-22 18:57:23,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=277, Invalid=3505, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 18:57:23,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-22 18:57:23,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2020-12-22 18:57:23,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-22 18:57:23,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-12-22 18:57:23,752 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 76 [2020-12-22 18:57:23,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:23,752 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-12-22 18:57:23,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 18:57:23,752 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-12-22 18:57:23,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 18:57:23,753 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:23,753 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:23,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 18:57:23,954 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:57:23,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:23,955 INFO L82 PathProgramCache]: Analyzing trace with hash -420335768, now seen corresponding path program 20 times [2020-12-22 18:57:23,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:23,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605455884] [2020-12-22 18:57:23,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:24,768 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 190 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:24,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605455884] [2020-12-22 18:57:24,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301738395] [2020-12-22 18:57:24,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:24,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 18:57:24,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:24,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-22 18:57:24,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:25,609 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 231 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:25,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:25,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29] total 44 [2020-12-22 18:57:25,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518810247] [2020-12-22 18:57:25,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-22 18:57:25,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:25,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-22 18:57:25,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1687, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 18:57:25,612 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 45 states. [2020-12-22 18:57:27,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:27,289 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2020-12-22 18:57:27,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 18:57:27,290 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 80 [2020-12-22 18:57:27,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:27,290 INFO L225 Difference]: With dead ends: 84 [2020-12-22 18:57:27,290 INFO L226 Difference]: Without dead ends: 84 [2020-12-22 18:57:27,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=727, Invalid=2695, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 18:57:27,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-22 18:57:27,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-12-22 18:57:27,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-22 18:57:27,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2020-12-22 18:57:27,293 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2020-12-22 18:57:27,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:27,293 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2020-12-22 18:57:27,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-22 18:57:27,294 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2020-12-22 18:57:27,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 18:57:27,294 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:27,295 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:27,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:27,509 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:57:27,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:27,509 INFO L82 PathProgramCache]: Analyzing trace with hash -215747807, now seen corresponding path program 21 times [2020-12-22 18:57:27,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:27,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44899937] [2020-12-22 18:57:27,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:28,497 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 13 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:28,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44899937] [2020-12-22 18:57:28,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876681459] [2020-12-22 18:57:28,497 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:28,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-12-22 18:57:28,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:28,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 93 conjunts are in the unsatisfiable core [2020-12-22 18:57:28,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:29,881 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 14 treesize of output 10 [2020-12-22 18:57:29,883 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:29,890 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:29,892 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 18:57:29,892 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 18:57:30,168 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 18:57:30,169 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:30,171 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:30,172 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 18:57:30,172 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-22 18:57:30,187 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 13 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:30,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:30,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 49 [2020-12-22 18:57:30,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935598641] [2020-12-22 18:57:30,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 18:57:30,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:30,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 18:57:30,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=2237, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 18:57:30,189 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 49 states. [2020-12-22 18:57:33,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:33,548 INFO L93 Difference]: Finished difference Result 118 states and 119 transitions. [2020-12-22 18:57:33,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 18:57:33,549 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 82 [2020-12-22 18:57:33,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:33,550 INFO L225 Difference]: With dead ends: 118 [2020-12-22 18:57:33,551 INFO L226 Difference]: Without dead ends: 90 [2020-12-22 18:57:33,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=295, Invalid=3995, Unknown=0, NotChecked=0, Total=4290 [2020-12-22 18:57:33,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-22 18:57:33,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-12-22 18:57:33,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-22 18:57:33,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-12-22 18:57:33,554 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 82 [2020-12-22 18:57:33,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:33,554 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-12-22 18:57:33,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 18:57:33,555 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-12-22 18:57:33,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 18:57:33,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:33,555 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:33,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:33,767 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:57:33,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:33,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1371037724, now seen corresponding path program 22 times [2020-12-22 18:57:33,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:33,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941804036] [2020-12-22 18:57:33,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:33,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:34,679 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 231 proven. 263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:34,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941804036] [2020-12-22 18:57:34,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881138049] [2020-12-22 18:57:34,680 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:34,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 18:57:34,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:34,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 88 conjunts are in the unsatisfiable core [2020-12-22 18:57:34,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:34,797 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2020-12-22 18:57:34,799 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:34,807 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:34,807 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:34,808 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-22 18:57:34,984 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-22 18:57:34,985 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:34,994 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:34,995 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:34,995 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-12-22 18:57:36,229 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:36,230 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-12-22 18:57:36,231 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 18:57:36,248 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:36,249 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:36,249 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2020-12-22 18:57:36,496 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 288 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:36,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:36,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32] total 49 [2020-12-22 18:57:36,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477435837] [2020-12-22 18:57:36,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-22 18:57:36,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:36,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-22 18:57:36,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2270, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 18:57:36,498 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 50 states. [2020-12-22 18:57:40,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:40,712 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2020-12-22 18:57:40,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 18:57:40,713 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 86 [2020-12-22 18:57:40,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:40,714 INFO L225 Difference]: With dead ends: 90 [2020-12-22 18:57:40,715 INFO L226 Difference]: Without dead ends: 90 [2020-12-22 18:57:40,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=606, Invalid=3950, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 18:57:40,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-22 18:57:40,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-12-22 18:57:40,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-22 18:57:40,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2020-12-22 18:57:40,718 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2020-12-22 18:57:40,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:40,719 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2020-12-22 18:57:40,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-22 18:57:40,719 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2020-12-22 18:57:40,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 18:57:40,720 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:40,720 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:40,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-22 18:57:40,920 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:57:40,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:40,921 INFO L82 PathProgramCache]: Analyzing trace with hash 987706525, now seen corresponding path program 23 times [2020-12-22 18:57:40,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:40,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602423321] [2020-12-22 18:57:40,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:40,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:42,086 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 14 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:42,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602423321] [2020-12-22 18:57:42,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135148097] [2020-12-22 18:57:42,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:42,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-12-22 18:57:42,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:42,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 94 conjunts are in the unsatisfiable core [2020-12-22 18:57:42,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:42,297 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2020-12-22 18:57:42,298 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:42,304 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:42,305 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:42,305 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-22 18:57:43,494 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-22 18:57:43,495 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:43,504 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:43,504 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:43,505 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2020-12-22 18:57:45,183 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:45,184 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-12-22 18:57:45,185 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 18:57:45,196 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:45,197 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:45,197 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:21 [2020-12-22 18:57:45,487 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 276 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:45,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:45,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32] total 65 [2020-12-22 18:57:45,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065395988] [2020-12-22 18:57:45,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-22 18:57:45,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:45,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-22 18:57:45,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=3954, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 18:57:45,489 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 65 states. [2020-12-22 18:57:54,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:54,684 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2020-12-22 18:57:54,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-22 18:57:54,685 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 88 [2020-12-22 18:57:54,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:54,686 INFO L225 Difference]: With dead ends: 129 [2020-12-22 18:57:54,686 INFO L226 Difference]: Without dead ends: 99 [2020-12-22 18:57:54,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1200, Invalid=11910, Unknown=0, NotChecked=0, Total=13110 [2020-12-22 18:57:54,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-22 18:57:54,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2020-12-22 18:57:54,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-22 18:57:54,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2020-12-22 18:57:54,691 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 88 [2020-12-22 18:57:54,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:54,691 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2020-12-22 18:57:54,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-22 18:57:54,691 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2020-12-22 18:57:54,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 18:57:54,692 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:54,692 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:54,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:54,907 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:57:54,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:54,907 INFO L82 PathProgramCache]: Analyzing trace with hash -759383847, now seen corresponding path program 24 times [2020-12-22 18:57:54,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:54,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126493426] [2020-12-22 18:57:54,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:54,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 15 proven. 588 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:56,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126493426] [2020-12-22 18:57:56,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612521546] [2020-12-22 18:57:56,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:56,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-12-22 18:57:56,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:56,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 105 conjunts are in the unsatisfiable core [2020-12-22 18:57:56,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:58,006 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 14 treesize of output 10 [2020-12-22 18:57:58,007 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:58,015 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:58,016 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 18:57:58,017 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 18:57:58,351 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 18:57:58,352 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:58,354 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:58,354 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 18:57:58,355 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-22 18:57:58,368 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 15 proven. 588 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:58,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:58,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 55 [2020-12-22 18:57:58,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420752405] [2020-12-22 18:57:58,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-22 18:57:58,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:58,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-22 18:57:58,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2841, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 18:57:58,370 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 55 states. [2020-12-22 18:58:03,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:58:03,067 INFO L93 Difference]: Finished difference Result 134 states and 135 transitions. [2020-12-22 18:58:03,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 18:58:03,068 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 94 [2020-12-22 18:58:03,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:58:03,069 INFO L225 Difference]: With dead ends: 134 [2020-12-22 18:58:03,069 INFO L226 Difference]: Without dead ends: 102 [2020-12-22 18:58:03,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=331, Invalid=5071, Unknown=0, NotChecked=0, Total=5402 [2020-12-22 18:58:03,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-22 18:58:03,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2020-12-22 18:58:03,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-22 18:58:03,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-12-22 18:58:03,073 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 94 [2020-12-22 18:58:03,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:58:03,073 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-12-22 18:58:03,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-22 18:58:03,073 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-12-22 18:58:03,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 18:58:03,074 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:58:03,074 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:58:03,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 18:58:03,278 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:58:03,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:58:03,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1483974372, now seen corresponding path program 25 times [2020-12-22 18:58:03,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:58:03,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943345258] [2020-12-22 18:58:03,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:58:03,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:58:04,511 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 325 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:58:04,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943345258] [2020-12-22 18:58:04,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098343148] [2020-12-22 18:58:04,511 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:58:04,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:58:04,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 90 conjunts are in the unsatisfiable core [2020-12-22 18:58:04,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:58:05,765 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 378 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:58:05,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:58:05,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35] total 53 [2020-12-22 18:58:05,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986827682] [2020-12-22 18:58:05,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-22 18:58:05,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:58:05,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-22 18:58:05,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=2434, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 18:58:05,770 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 54 states. [2020-12-22 18:58:08,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:58:08,409 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2020-12-22 18:58:08,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 18:58:08,410 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 98 [2020-12-22 18:58:08,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:58:08,411 INFO L225 Difference]: With dead ends: 102 [2020-12-22 18:58:08,411 INFO L226 Difference]: Without dead ends: 102 [2020-12-22 18:58:08,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1057, Invalid=3913, Unknown=0, NotChecked=0, Total=4970 [2020-12-22 18:58:08,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-22 18:58:08,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-12-22 18:58:08,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-22 18:58:08,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2020-12-22 18:58:08,415 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2020-12-22 18:58:08,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:58:08,416 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2020-12-22 18:58:08,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-22 18:58:08,416 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2020-12-22 18:58:08,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 18:58:08,416 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:58:08,417 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:58:08,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 18:58:08,633 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:58:08,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:58:08,634 INFO L82 PathProgramCache]: Analyzing trace with hash -170229803, now seen corresponding path program 26 times [2020-12-22 18:58:08,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:58:08,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701194860] [2020-12-22 18:58:08,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:58:08,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:58:10,212 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 16 proven. 675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:58:10,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701194860] [2020-12-22 18:58:10,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600694432] [2020-12-22 18:58:10,212 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:58:10,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 18:58:10,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:58:10,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 100 conjunts are in the unsatisfiable core [2020-12-22 18:58:10,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:58:10,343 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2020-12-22 18:58:10,344 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:10,353 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:10,354 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:58:10,354 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-22 18:58:11,992 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-22 18:58:11,993 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:12,002 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:12,003 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:58:12,003 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2020-12-22 18:58:15,204 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:15,205 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2020-12-22 18:58:15,206 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 18:58:15,225 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:15,227 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 18:58:15,229 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 18:58:15,229 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:37 [2020-12-22 18:58:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 378 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:58:15,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:58:15,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 74 [2020-12-22 18:58:15,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80901433] [2020-12-22 18:58:15,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-12-22 18:58:15,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:58:15,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-12-22 18:58:15,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=5150, Unknown=0, NotChecked=0, Total=5402 [2020-12-22 18:58:15,698 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 74 states. [2020-12-22 18:58:21,586 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-12-22 18:58:22,247 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-12-22 18:58:24,564 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-12-22 18:58:27,269 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-12-22 18:58:29,722 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-12-22 18:58:30,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:58:30,778 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2020-12-22 18:58:30,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-22 18:58:30,780 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 100 [2020-12-22 18:58:30,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:58:30,781 INFO L225 Difference]: With dead ends: 145 [2020-12-22 18:58:30,781 INFO L226 Difference]: Without dead ends: 111 [2020-12-22 18:58:30,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=1485, Invalid=15545, Unknown=0, NotChecked=0, Total=17030 [2020-12-22 18:58:30,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-22 18:58:30,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2020-12-22 18:58:30,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-22 18:58:30,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2020-12-22 18:58:30,784 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 100 [2020-12-22 18:58:30,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:58:30,784 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2020-12-22 18:58:30,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-12-22 18:58:30,785 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2020-12-22 18:58:30,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 18:58:30,785 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:58:30,785 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:58:30,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 18:58:30,986 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:58:30,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:58:30,987 INFO L82 PathProgramCache]: Analyzing trace with hash 307399057, now seen corresponding path program 27 times [2020-12-22 18:58:30,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:58:30,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141630643] [2020-12-22 18:58:30,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:58:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:58:32,821 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 17 proven. 768 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:58:32,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141630643] [2020-12-22 18:58:32,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819738118] [2020-12-22 18:58:32,822 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:58:33,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-22 18:58:33,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:58:33,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 117 conjunts are in the unsatisfiable core [2020-12-22 18:58:33,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:58:34,857 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 14 treesize of output 10 [2020-12-22 18:58:34,859 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:34,868 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:34,869 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 18:58:34,870 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 18:58:35,285 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 18:58:35,286 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:35,289 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:35,289 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 18:58:35,290 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-22 18:58:35,308 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 17 proven. 768 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:58:35,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:58:35,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 61 [2020-12-22 18:58:35,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283770131] [2020-12-22 18:58:35,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-22 18:58:35,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:58:35,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-22 18:58:35,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=3517, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 18:58:35,310 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 61 states. [2020-12-22 18:58:41,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:58:41,477 INFO L93 Difference]: Finished difference Result 150 states and 151 transitions. [2020-12-22 18:58:41,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 18:58:41,478 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 106 [2020-12-22 18:58:41,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:58:41,479 INFO L225 Difference]: With dead ends: 150 [2020-12-22 18:58:41,479 INFO L226 Difference]: Without dead ends: 114 [2020-12-22 18:58:41,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=367, Invalid=6275, Unknown=0, NotChecked=0, Total=6642 [2020-12-22 18:58:41,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-22 18:58:41,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2020-12-22 18:58:41,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-22 18:58:41,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2020-12-22 18:58:41,484 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 106 [2020-12-22 18:58:41,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:58:41,484 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2020-12-22 18:58:41,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-22 18:58:41,484 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2020-12-22 18:58:41,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 18:58:41,485 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:58:41,485 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:58:41,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 18:58:41,691 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:58:41,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:58:41,692 INFO L82 PathProgramCache]: Analyzing trace with hash 2029837652, now seen corresponding path program 28 times [2020-12-22 18:58:41,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:58:41,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627636440] [2020-12-22 18:58:41,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:58:41,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:58:43,387 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 435 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:58:43,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627636440] [2020-12-22 18:58:43,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198925364] [2020-12-22 18:58:43,388 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:58:43,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 18:58:43,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:58:43,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 108 conjunts are in the unsatisfiable core [2020-12-22 18:58:43,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:58:43,527 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2020-12-22 18:58:43,532 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:43,541 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:43,542 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:58:43,543 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-22 18:58:43,831 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-22 18:58:43,832 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:43,842 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:43,843 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:58:43,844 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-12-22 18:58:46,194 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:46,195 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-12-22 18:58:46,198 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 18:58:46,215 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:46,217 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:58:46,217 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2020-12-22 18:58:46,577 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 512 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:58:46,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:58:46,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 40] total 61 [2020-12-22 18:58:46,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987992463] [2020-12-22 18:58:46,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-22 18:58:46,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:58:46,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-22 18:58:46,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=3520, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 18:58:46,579 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 62 states. [2020-12-22 18:58:54,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:58:54,489 INFO L93 Difference]: Finished difference Result 114 states and 115 transitions. [2020-12-22 18:58:54,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 18:58:54,491 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 110 [2020-12-22 18:58:54,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:58:54,492 INFO L225 Difference]: With dead ends: 114 [2020-12-22 18:58:54,492 INFO L226 Difference]: Without dead ends: 114 [2020-12-22 18:58:54,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=876, Invalid=6096, Unknown=0, NotChecked=0, Total=6972 [2020-12-22 18:58:54,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-22 18:58:54,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-12-22 18:58:54,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-22 18:58:54,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2020-12-22 18:58:54,495 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2020-12-22 18:58:54,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:58:54,495 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2020-12-22 18:58:54,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-22 18:58:54,495 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2020-12-22 18:58:54,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 18:58:54,496 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:58:54,496 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:58:54,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 18:58:54,701 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:58:54,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:58:54,703 INFO L82 PathProgramCache]: Analyzing trace with hash 758830605, now seen corresponding path program 29 times [2020-12-22 18:58:54,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:58:54,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178035908] [2020-12-22 18:58:54,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:58:54,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:58:56,997 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 18 proven. 867 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:58:56,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178035908] [2020-12-22 18:58:56,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239296879] [2020-12-22 18:58:56,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:58:57,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-12-22 18:58:57,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:58:57,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 123 conjunts are in the unsatisfiable core [2020-12-22 18:58:57,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:58:59,338 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 14 treesize of output 10 [2020-12-22 18:58:59,339 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:59,349 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:59,350 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 18:58:59,351 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 18:58:59,776 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 18:58:59,779 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:59,782 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:59,783 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 18:58:59,783 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-22 18:58:59,809 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 18 proven. 867 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:58:59,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:58:59,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 64 [2020-12-22 18:58:59,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339960865] [2020-12-22 18:58:59,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-22 18:58:59,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:58:59,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-22 18:58:59,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=3882, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 18:58:59,811 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 64 states. [2020-12-22 18:59:06,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:06,025 INFO L93 Difference]: Finished difference Result 158 states and 159 transitions. [2020-12-22 18:59:06,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 18:59:06,026 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 112 [2020-12-22 18:59:06,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:06,027 INFO L225 Difference]: With dead ends: 158 [2020-12-22 18:59:06,028 INFO L226 Difference]: Without dead ends: 120 [2020-12-22 18:59:06,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=385, Invalid=6925, Unknown=0, NotChecked=0, Total=7310 [2020-12-22 18:59:06,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-22 18:59:06,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2020-12-22 18:59:06,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-22 18:59:06,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2020-12-22 18:59:06,030 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 112 [2020-12-22 18:59:06,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:06,031 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2020-12-22 18:59:06,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-22 18:59:06,031 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2020-12-22 18:59:06,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 18:59:06,031 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:06,031 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:06,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:59:06,232 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:59:06,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:06,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1559890832, now seen corresponding path program 30 times [2020-12-22 18:59:06,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:06,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876177969] [2020-12-22 18:59:06,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:08,083 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 496 proven. 458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:08,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876177969] [2020-12-22 18:59:08,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803440973] [2020-12-22 18:59:08,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:59:09,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-22 18:59:09,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:59:09,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-22 18:59:09,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:59:09,682 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2020-12-22 18:59:09,683 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:09,691 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:09,692 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:59:09,692 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-22 18:59:09,884 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-22 18:59:09,885 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:09,889 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:09,890 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:59:09,890 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-22 18:59:10,128 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:10,128 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-12-22 18:59:10,130 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 18:59:10,146 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:10,148 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:59:10,148 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:23 [2020-12-22 18:59:10,396 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 919 trivial. 0 not checked. [2020-12-22 18:59:10,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:59:10,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 6] total 45 [2020-12-22 18:59:10,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874507270] [2020-12-22 18:59:10,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 18:59:10,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:10,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 18:59:10,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1789, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 18:59:10,398 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 46 states. [2020-12-22 18:59:15,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:15,315 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2020-12-22 18:59:15,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 18:59:15,317 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 116 [2020-12-22 18:59:15,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:15,318 INFO L225 Difference]: With dead ends: 117 [2020-12-22 18:59:15,318 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 18:59:15,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=906, Invalid=3650, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 18:59:15,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 18:59:15,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 18:59:15,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 18:59:15,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 18:59:15,320 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 116 [2020-12-22 18:59:15,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:15,320 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 18:59:15,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 18:59:15,320 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 18:59:15,320 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 18:59:15,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 18:59:15,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 06:59:15 BoogieIcfgContainer [2020-12-22 18:59:15,532 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 18:59:15,533 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 18:59:15,533 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 18:59:15,533 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 18:59:15,534 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:56:20" (3/4) ... [2020-12-22 18:59:15,538 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-22 18:59:15,554 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-12-22 18:59:15,554 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-12-22 18:59:15,554 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-22 18:59:15,613 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/array-memsafety/cstrlen-alloca-2.i-witness.graphml [2020-12-22 18:59:15,614 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 18:59:15,615 INFO L168 Benchmark]: Toolchain (without parser) took 175974.35 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 125.1 MB in the beginning and 242.4 MB in the end (delta: -117.3 MB). Peak memory consumption was 46.9 MB. Max. memory is 8.0 GB. [2020-12-22 18:59:15,615 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 123.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 18:59:15,616 INFO L168 Benchmark]: CACSL2BoogieTranslator took 478.82 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 104.5 MB in the end (delta: 20.3 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2020-12-22 18:59:15,616 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.93 ms. Allocated memory is still 151.0 MB. Free memory was 104.5 MB in the beginning and 102.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 18:59:15,616 INFO L168 Benchmark]: Boogie Preprocessor took 73.46 ms. Allocated memory is still 151.0 MB. Free memory was 102.7 MB in the beginning and 133.6 MB in the end (delta: -30.9 MB). Peak memory consumption was 4.8 MB. Max. memory is 8.0 GB. [2020-12-22 18:59:15,617 INFO L168 Benchmark]: RCFGBuilder took 475.78 ms. Allocated memory is still 151.0 MB. Free memory was 133.6 MB in the beginning and 117.3 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-12-22 18:59:15,617 INFO L168 Benchmark]: TraceAbstraction took 174803.20 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 117.3 MB in the beginning and 245.1 MB in the end (delta: -127.8 MB). Peak memory consumption was 36.9 MB. Max. memory is 8.0 GB. [2020-12-22 18:59:15,618 INFO L168 Benchmark]: Witness Printer took 81.06 ms. Allocated memory is still 314.6 MB. Free memory was 245.1 MB in the beginning and 242.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 18:59:15,620 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 123.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 478.82 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 104.5 MB in the end (delta: 20.3 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 50.93 ms. Allocated memory is still 151.0 MB. Free memory was 104.5 MB in the beginning and 102.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 73.46 ms. Allocated memory is still 151.0 MB. Free memory was 102.7 MB in the beginning and 133.6 MB in the end (delta: -30.9 MB). Peak memory consumption was 4.8 MB. Max. memory is 8.0 GB. * RCFGBuilder took 475.78 ms. Allocated memory is still 151.0 MB. Free memory was 133.6 MB in the beginning and 117.3 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 174803.20 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 117.3 MB in the beginning and 245.1 MB in the end (delta: -127.8 MB). Peak memory consumption was 36.9 MB. Max. memory is 8.0 GB. * Witness Printer took 81.06 ms. Allocated memory is still 314.6 MB. Free memory was 245.1 MB in the beginning and 242.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 174.6s, OverallIterations: 40, TraceHistogramMax: 18, AutomataDifference: 100.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 540 SDtfs, 4947 SDslu, 11616 SDs, 0 SdLazy, 49721 SolverSat, 3187 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 41.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3206 GetRequests, 1474 SyntacticMatches, 17 SemanticMatches, 1715 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13842 ImplicationChecksByTransitivity, 94.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=117occurred in iteration=39, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 40 MinimizatonAttempts, 129 StatesRemovedByMinimization, 35 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 5.0s SatisfiabilityAnalysisTime, 60.0s InterpolantComputationTime, 3940 NumberOfCodeBlocks, 3886 NumberOfCodeBlocksAsserted, 234 NumberOfCheckSat, 3869 ConstructedInterpolants, 105 QuantifiedInterpolants, 2861933 SizeOfPredicates, 327 NumberOfNonLiveVariables, 7466 ConjunctsInSsa, 2044 ConjunctsInUnsatCore, 71 InterpolantComputations, 9 PerfectInterpolantSequences, 5997/19860 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 correct! Received shutdown request...