/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/openbsd_cstrpbrk-alloca-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 19:00:49,958 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 19:00:49,961 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 19:00:49,997 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 19:00:49,998 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 19:00:50,000 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 19:00:50,001 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 19:00:50,004 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 19:00:50,006 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 19:00:50,008 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 19:00:50,009 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 19:00:50,011 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 19:00:50,011 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 19:00:50,013 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 19:00:50,014 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 19:00:50,016 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 19:00:50,017 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 19:00:50,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 19:00:50,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 19:00:50,046 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 19:00:50,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 19:00:50,059 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 19:00:50,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 19:00:50,075 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 19:00:50,085 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 19:00:50,093 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 19:00:50,094 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 19:00:50,095 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 19:00:50,097 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 19:00:50,098 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 19:00:50,098 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 19:00:50,100 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 19:00:50,100 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 19:00:50,100 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 19:00:50,101 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 19:00:50,102 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 19:00:50,103 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-22 19:00:50,155 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 19:00:50,156 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 19:00:50,161 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 19:00:50,161 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 19:00:50,162 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 19:00:50,162 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 19:00:50,162 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-22 19:00:50,162 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 19:00:50,162 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 19:00:50,163 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-22 19:00:50,164 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-22 19:00:50,164 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-22 19:00:50,164 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 19:00:50,164 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-22 19:00:50,165 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 19:00:50,165 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 19:00:50,165 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 19:00:50,165 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 19:00:50,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 19:00:50,166 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 19:00:50,166 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 19:00:50,166 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 19:00:50,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 19:00:50,167 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 19:00:50,167 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 19:00:50,653 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 19:00:50,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 19:00:50,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 19:00:50,701 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 19:00:50,702 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 19:00:50,703 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2020-12-22 19:00:50,794 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/762023958/4914e7839dfa4334bc12879b66041be4/FLAG3a7255c86 [2020-12-22 19:00:51,628 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 19:00:51,629 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2020-12-22 19:00:51,654 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/762023958/4914e7839dfa4334bc12879b66041be4/FLAG3a7255c86 [2020-12-22 19:00:51,821 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/762023958/4914e7839dfa4334bc12879b66041be4 [2020-12-22 19:00:51,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 19:00:51,828 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 19:00:51,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 19:00:51,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 19:00:51,835 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 19:00:51,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:00:51" (1/1) ... [2020-12-22 19:00:51,839 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@463f0374 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:51, skipping insertion in model container [2020-12-22 19:00:51,839 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:00:51" (1/1) ... [2020-12-22 19:00:51,849 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 19:00:51,887 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 19:00:52,290 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:00:52,301 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 19:00:52,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:00:52,427 INFO L208 MainTranslator]: Completed translation [2020-12-22 19:00:52,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:52 WrapperNode [2020-12-22 19:00:52,428 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 19:00:52,431 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 19:00:52,431 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 19:00:52,431 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 19:00:52,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:52" (1/1) ... [2020-12-22 19:00:52,481 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:52" (1/1) ... [2020-12-22 19:00:52,542 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 19:00:52,543 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 19:00:52,543 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 19:00:52,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 19:00:52,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:52" (1/1) ... [2020-12-22 19:00:52,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:52" (1/1) ... [2020-12-22 19:00:52,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:52" (1/1) ... [2020-12-22 19:00:52,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:52" (1/1) ... [2020-12-22 19:00:52,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:52" (1/1) ... [2020-12-22 19:00:52,608 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:52" (1/1) ... [2020-12-22 19:00:52,610 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:52" (1/1) ... [2020-12-22 19:00:52,613 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 19:00:52,614 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 19:00:52,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 19:00:52,615 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 19:00:52,616 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:52" (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 19:00:52,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 19:00:52,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 19:00:52,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 19:00:52,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 19:00:52,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 19:00:52,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 19:00:53,316 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 19:00:53,317 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-22 19:00:53,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:00:53 BoogieIcfgContainer [2020-12-22 19:00:53,319 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 19:00:53,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 19:00:53,322 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 19:00:53,326 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 19:00:53,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:00:51" (1/3) ... [2020-12-22 19:00:53,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e95db56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:00:53, skipping insertion in model container [2020-12-22 19:00:53,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:52" (2/3) ... [2020-12-22 19:00:53,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e95db56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:00:53, skipping insertion in model container [2020-12-22 19:00:53,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:00:53" (3/3) ... [2020-12-22 19:00:53,331 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrpbrk-alloca-2.i [2020-12-22 19:00:53,341 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 19:00:53,349 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-12-22 19:00:53,374 INFO L253 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-12-22 19:00:53,402 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 19:00:53,402 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-22 19:00:53,402 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 19:00:53,402 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 19:00:53,403 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 19:00:53,403 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 19:00:53,403 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 19:00:53,403 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 19:00:53,423 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-12-22 19:00:53,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 19:00:53,432 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:53,433 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:53,434 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:53,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:53,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2020-12-22 19:00:53,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:53,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401671610] [2020-12-22 19:00:53,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:53,695 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 19:00:53,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401671610] [2020-12-22 19:00:53,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:53,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:00:53,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022815091] [2020-12-22 19:00:53,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:00:53,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:53,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:00:53,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:00:53,729 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-12-22 19:00:53,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:53,827 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-12-22 19:00:53,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:00:53,831 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-22 19:00:53,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:53,843 INFO L225 Difference]: With dead ends: 42 [2020-12-22 19:00:53,843 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 19:00:53,846 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 19:00:53,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 19:00:53,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-22 19:00:53,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 19:00:53,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-12-22 19:00:53,889 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 7 [2020-12-22 19:00:53,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:53,889 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-12-22 19:00:53,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:00:53,890 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-12-22 19:00:53,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 19:00:53,890 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:53,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:53,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 19:00:53,891 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:53,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:53,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029097, now seen corresponding path program 1 times [2020-12-22 19:00:53,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:53,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130172631] [2020-12-22 19:00:53,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:54,154 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 19:00:54,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130172631] [2020-12-22 19:00:54,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:54,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:00:54,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544923861] [2020-12-22 19:00:54,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:00:54,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:54,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:00:54,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:00:54,170 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 5 states. [2020-12-22 19:00:54,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:54,350 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-12-22 19:00:54,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:00:54,351 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-22 19:00:54,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:54,352 INFO L225 Difference]: With dead ends: 44 [2020-12-22 19:00:54,352 INFO L226 Difference]: Without dead ends: 44 [2020-12-22 19:00:54,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:00:54,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-22 19:00:54,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-12-22 19:00:54,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 19:00:54,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-12-22 19:00:54,361 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 7 [2020-12-22 19:00:54,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:54,361 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-12-22 19:00:54,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:00:54,362 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-12-22 19:00:54,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 19:00:54,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:54,362 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:54,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 19:00:54,363 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:54,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:54,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1906083540, now seen corresponding path program 1 times [2020-12-22 19:00:54,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:54,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610617750] [2020-12-22 19:00:54,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:54,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:54,474 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 19:00:54,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610617750] [2020-12-22 19:00:54,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378600949] [2020-12-22 19:00:54,475 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 19:00:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:54,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 19:00:54,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:54,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:00:54,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2020-12-22 19:00:54,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728653139] [2020-12-22 19:00:54,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:00:54,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:54,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:00:54,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:00:54,692 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 5 states. [2020-12-22 19:00:54,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:54,744 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2020-12-22 19:00:54,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:00:54,745 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-22 19:00:54,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:54,747 INFO L225 Difference]: With dead ends: 79 [2020-12-22 19:00:54,747 INFO L226 Difference]: Without dead ends: 79 [2020-12-22 19:00:54,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:00:54,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-22 19:00:54,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 49. [2020-12-22 19:00:54,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 19:00:54,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2020-12-22 19:00:54,756 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 11 [2020-12-22 19:00:54,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:54,756 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2020-12-22 19:00:54,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:00:54,756 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2020-12-22 19:00:54,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 19:00:54,757 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:54,757 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:54,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 19:00:54,972 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:54,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:54,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2020-12-22 19:00:54,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:54,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613271483] [2020-12-22 19:00:54,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:55,104 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 19:00:55,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613271483] [2020-12-22 19:00:55,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400862200] [2020-12-22 19:00:55,105 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 19:00:55,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:55,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 19:00:55,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:55,214 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_16|], 1=[|v_#valid_24|]} [2020-12-22 19:00:55,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:00:55,236 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 19:00:55,238 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:55,252 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:55,262 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2020-12-22 19:00:55,264 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:55,277 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:55,280 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:55,281 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-22 19:00:55,323 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 19:00:55,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:55,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 19:00:55,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895015830] [2020-12-22 19:00:55,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 19:00:55,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:55,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 19:00:55,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:00:55,326 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 6 states. [2020-12-22 19:00:55,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:55,489 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-12-22 19:00:55,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:00:55,490 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-22 19:00:55,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:55,491 INFO L225 Difference]: With dead ends: 50 [2020-12-22 19:00:55,491 INFO L226 Difference]: Without dead ends: 50 [2020-12-22 19:00:55,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 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 19:00:55,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-22 19:00:55,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-12-22 19:00:55,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 19:00:55,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-12-22 19:00:55,508 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 11 [2020-12-22 19:00:55,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:55,508 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-12-22 19:00:55,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 19:00:55,508 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-12-22 19:00:55,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 19:00:55,509 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:55,509 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:55,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:55,725 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:55,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:55,727 INFO L82 PathProgramCache]: Analyzing trace with hash -2090265437, now seen corresponding path program 1 times [2020-12-22 19:00:55,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:55,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025996922] [2020-12-22 19:00:55,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:55,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:55,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:55,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025996922] [2020-12-22 19:00:55,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:55,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:00:55,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116813323] [2020-12-22 19:00:55,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:00:55,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:55,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:00:55,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:00:55,812 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 4 states. [2020-12-22 19:00:55,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:55,876 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2020-12-22 19:00:55,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:00:55,882 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-22 19:00:55,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:55,884 INFO L225 Difference]: With dead ends: 53 [2020-12-22 19:00:55,884 INFO L226 Difference]: Without dead ends: 53 [2020-12-22 19:00:55,884 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 19:00:55,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-22 19:00:55,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-12-22 19:00:55,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 19:00:55,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-12-22 19:00:55,899 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 13 [2020-12-22 19:00:55,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:55,899 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-12-22 19:00:55,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:00:55,902 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-12-22 19:00:55,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 19:00:55,903 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:55,903 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:55,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 19:00:55,903 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:55,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:55,905 INFO L82 PathProgramCache]: Analyzing trace with hash -2090265385, now seen corresponding path program 1 times [2020-12-22 19:00:55,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:55,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703449481] [2020-12-22 19:00:55,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:55,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:55,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:55,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703449481] [2020-12-22 19:00:55,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:55,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:00:55,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408041862] [2020-12-22 19:00:55,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:00:55,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:55,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:00:55,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:00:55,979 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 3 states. [2020-12-22 19:00:56,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:56,024 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-12-22 19:00:56,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:00:56,025 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-12-22 19:00:56,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:56,026 INFO L225 Difference]: With dead ends: 46 [2020-12-22 19:00:56,026 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 19:00:56,027 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 19:00:56,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 19:00:56,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-22 19:00:56,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 19:00:56,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-12-22 19:00:56,033 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 13 [2020-12-22 19:00:56,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:56,033 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-12-22 19:00:56,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:00:56,033 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-12-22 19:00:56,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 19:00:56,034 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:56,034 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:56,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 19:00:56,035 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:56,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:56,036 INFO L82 PathProgramCache]: Analyzing trace with hash -2090265384, now seen corresponding path program 1 times [2020-12-22 19:00:56,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:56,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025234506] [2020-12-22 19:00:56,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:56,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:56,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:56,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025234506] [2020-12-22 19:00:56,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:56,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 19:00:56,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206207919] [2020-12-22 19:00:56,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 19:00:56,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:56,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 19:00:56,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:00:56,114 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 6 states. [2020-12-22 19:00:56,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:56,184 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2020-12-22 19:00:56,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:00:56,184 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-12-22 19:00:56,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:56,185 INFO L225 Difference]: With dead ends: 48 [2020-12-22 19:00:56,185 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 19:00:56,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:00:56,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 19:00:56,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-12-22 19:00:56,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 19:00:56,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-12-22 19:00:56,192 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 13 [2020-12-22 19:00:56,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:56,192 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-12-22 19:00:56,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 19:00:56,193 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-12-22 19:00:56,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 19:00:56,193 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:56,193 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:56,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 19:00:56,194 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:56,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:56,195 INFO L82 PathProgramCache]: Analyzing trace with hash -862198810, now seen corresponding path program 1 times [2020-12-22 19:00:56,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:56,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546156492] [2020-12-22 19:00:56,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:56,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:56,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:56,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546156492] [2020-12-22 19:00:56,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174800945] [2020-12-22 19:00:56,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:56,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 19:00:56,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:56,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:56,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:56,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2020-12-22 19:00:56,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310237183] [2020-12-22 19:00:56,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 19:00:56,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:56,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 19:00:56,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:00:56,493 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 8 states. [2020-12-22 19:00:56,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:56,672 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-12-22 19:00:56,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:00:56,673 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-12-22 19:00:56,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:56,674 INFO L225 Difference]: With dead ends: 74 [2020-12-22 19:00:56,675 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 19:00:56,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-22 19:00:56,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 19:00:56,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 54. [2020-12-22 19:00:56,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 19:00:56,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2020-12-22 19:00:56,681 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 17 [2020-12-22 19:00:56,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:56,682 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2020-12-22 19:00:56,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 19:00:56,682 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2020-12-22 19:00:56,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 19:00:56,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:56,683 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:56,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:56,898 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:56,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:56,899 INFO L82 PathProgramCache]: Analyzing trace with hash -862198757, now seen corresponding path program 1 times [2020-12-22 19:00:56,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:56,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584988006] [2020-12-22 19:00:56,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:56,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:56,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:56,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584988006] [2020-12-22 19:00:56,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100410051] [2020-12-22 19:00:56,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:57,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 19:00:57,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:57,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:57,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:00:57,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2020-12-22 19:00:57,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181302543] [2020-12-22 19:00:57,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:00:57,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:57,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:00:57,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:00:57,119 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand 5 states. [2020-12-22 19:00:57,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:57,150 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2020-12-22 19:00:57,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:00:57,151 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-12-22 19:00:57,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:57,154 INFO L225 Difference]: With dead ends: 100 [2020-12-22 19:00:57,154 INFO L226 Difference]: Without dead ends: 100 [2020-12-22 19:00:57,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:00:57,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-22 19:00:57,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 78. [2020-12-22 19:00:57,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-22 19:00:57,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2020-12-22 19:00:57,179 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 17 [2020-12-22 19:00:57,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:57,181 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2020-12-22 19:00:57,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:00:57,181 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2020-12-22 19:00:57,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 19:00:57,183 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:57,183 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:57,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:57,384 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:57,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:57,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1873316007, now seen corresponding path program 1 times [2020-12-22 19:00:57,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:57,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550653055] [2020-12-22 19:00:57,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:57,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:57,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:57,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550653055] [2020-12-22 19:00:57,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341972555] [2020-12-22 19:00:57,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:00:57,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:57,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 19:00:57,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:57,582 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:57,582 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:00:57,586 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:57,603 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:00:57,606 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:57,606 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 19:00:57,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:57,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:57,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 19:00:57,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885161084] [2020-12-22 19:00:57,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 19:00:57,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:57,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 19:00:57,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:00:57,649 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand 7 states. [2020-12-22 19:00:57,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:57,721 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2020-12-22 19:00:57,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:00:57,722 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-12-22 19:00:57,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:57,723 INFO L225 Difference]: With dead ends: 81 [2020-12-22 19:00:57,723 INFO L226 Difference]: Without dead ends: 81 [2020-12-22 19:00:57,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:00:57,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-22 19:00:57,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2020-12-22 19:00:57,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-22 19:00:57,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2020-12-22 19:00:57,729 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 17 [2020-12-22 19:00:57,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:57,729 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2020-12-22 19:00:57,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 19:00:57,729 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2020-12-22 19:00:57,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 19:00:57,730 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:57,730 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:57,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 19:00:57,946 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:57,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:57,947 INFO L82 PathProgramCache]: Analyzing trace with hash -2142062488, now seen corresponding path program 1 times [2020-12-22 19:00:57,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:57,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891850482] [2020-12-22 19:00:57,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:57,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:58,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:58,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891850482] [2020-12-22 19:00:58,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:58,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 19:00:58,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112629656] [2020-12-22 19:00:58,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 19:00:58,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:58,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 19:00:58,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:00:58,030 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand 7 states. [2020-12-22 19:00:58,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:58,097 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2020-12-22 19:00:58,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:00:58,097 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-12-22 19:00:58,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:58,098 INFO L225 Difference]: With dead ends: 74 [2020-12-22 19:00:58,098 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 19:00:58,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:00:58,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 19:00:58,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2020-12-22 19:00:58,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-22 19:00:58,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2020-12-22 19:00:58,102 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 17 [2020-12-22 19:00:58,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:58,103 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2020-12-22 19:00:58,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 19:00:58,103 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2020-12-22 19:00:58,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 19:00:58,104 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:58,104 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:58,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 19:00:58,105 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:58,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:58,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1835484247, now seen corresponding path program 1 times [2020-12-22 19:00:58,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:58,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732171169] [2020-12-22 19:00:58,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:58,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:58,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:58,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732171169] [2020-12-22 19:00:58,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:58,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:00:58,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218245751] [2020-12-22 19:00:58,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:00:58,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:58,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:00:58,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:00:58,167 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 5 states. [2020-12-22 19:00:58,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:58,232 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-12-22 19:00:58,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:00:58,233 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-12-22 19:00:58,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:58,233 INFO L225 Difference]: With dead ends: 60 [2020-12-22 19:00:58,233 INFO L226 Difference]: Without dead ends: 60 [2020-12-22 19:00:58,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:00:58,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-22 19:00:58,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-12-22 19:00:58,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-22 19:00:58,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2020-12-22 19:00:58,237 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 21 [2020-12-22 19:00:58,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:58,238 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2020-12-22 19:00:58,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:00:58,238 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2020-12-22 19:00:58,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 19:00:58,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:58,239 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:58,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 19:00:58,239 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:58,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:58,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1835484246, now seen corresponding path program 1 times [2020-12-22 19:00:58,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:58,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320862965] [2020-12-22 19:00:58,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:58,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:58,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320862965] [2020-12-22 19:00:58,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630311498] [2020-12-22 19:00:58,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:58,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 19:00:58,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:58,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:58,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:58,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2020-12-22 19:00:58,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358990049] [2020-12-22 19:00:58,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 19:00:58,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:58,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 19:00:58,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 19:00:58,529 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 11 states. [2020-12-22 19:00:58,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:58,757 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2020-12-22 19:00:58,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 19:00:58,757 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-12-22 19:00:58,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:58,758 INFO L225 Difference]: With dead ends: 70 [2020-12-22 19:00:58,758 INFO L226 Difference]: Without dead ends: 70 [2020-12-22 19:00:58,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-12-22 19:00:58,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-22 19:00:58,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2020-12-22 19:00:58,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 19:00:58,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2020-12-22 19:00:58,770 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 21 [2020-12-22 19:00:58,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:58,771 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2020-12-22 19:00:58,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 19:00:58,771 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2020-12-22 19:00:58,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 19:00:58,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:58,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:58,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:58,992 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:58,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:58,993 INFO L82 PathProgramCache]: Analyzing trace with hash -618546161, now seen corresponding path program 1 times [2020-12-22 19:00:58,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:58,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800721144] [2020-12-22 19:00:58,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:59,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:59,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800721144] [2020-12-22 19:00:59,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:59,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 19:00:59,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744539631] [2020-12-22 19:00:59,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 19:00:59,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:59,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 19:00:59,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:00:59,048 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 6 states. [2020-12-22 19:00:59,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:59,139 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2020-12-22 19:00:59,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:00:59,139 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-12-22 19:00:59,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:59,140 INFO L225 Difference]: With dead ends: 65 [2020-12-22 19:00:59,140 INFO L226 Difference]: Without dead ends: 65 [2020-12-22 19:00:59,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:00:59,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-22 19:00:59,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2020-12-22 19:00:59,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-22 19:00:59,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2020-12-22 19:00:59,144 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 25 [2020-12-22 19:00:59,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:59,144 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2020-12-22 19:00:59,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 19:00:59,145 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2020-12-22 19:00:59,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 19:00:59,146 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:59,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:59,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 19:00:59,146 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:59,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:59,147 INFO L82 PathProgramCache]: Analyzing trace with hash -618546160, now seen corresponding path program 1 times [2020-12-22 19:00:59,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:59,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786753175] [2020-12-22 19:00:59,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:59,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:00:59,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786753175] [2020-12-22 19:00:59,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:59,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 19:00:59,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069153302] [2020-12-22 19:00:59,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 19:00:59,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:59,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 19:00:59,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:00:59,248 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 8 states. [2020-12-22 19:00:59,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:59,360 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2020-12-22 19:00:59,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 19:00:59,361 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-12-22 19:00:59,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:59,362 INFO L225 Difference]: With dead ends: 65 [2020-12-22 19:00:59,362 INFO L226 Difference]: Without dead ends: 65 [2020-12-22 19:00:59,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-12-22 19:00:59,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-22 19:00:59,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2020-12-22 19:00:59,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 19:00:59,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2020-12-22 19:00:59,365 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 25 [2020-12-22 19:00:59,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:59,365 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2020-12-22 19:00:59,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 19:00:59,366 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2020-12-22 19:00:59,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 19:00:59,367 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:59,367 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:59,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 19:00:59,367 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:59,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:59,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1995099464, now seen corresponding path program 1 times [2020-12-22 19:00:59,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:59,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920741986] [2020-12-22 19:00:59,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:59,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:59,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:00:59,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920741986] [2020-12-22 19:00:59,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:59,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:00:59,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822285451] [2020-12-22 19:00:59,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:00:59,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:59,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:00:59,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:00:59,481 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand 4 states. [2020-12-22 19:00:59,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:59,506 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-12-22 19:00:59,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:00:59,507 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-12-22 19:00:59,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:59,508 INFO L225 Difference]: With dead ends: 62 [2020-12-22 19:00:59,508 INFO L226 Difference]: Without dead ends: 59 [2020-12-22 19:00:59,508 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 19:00:59,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-22 19:00:59,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-12-22 19:00:59,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 19:00:59,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-12-22 19:00:59,511 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 26 [2020-12-22 19:00:59,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:59,512 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-12-22 19:00:59,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:00:59,512 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-12-22 19:00:59,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 19:00:59,513 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:59,513 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:59,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 19:00:59,514 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:59,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:59,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1127339532, now seen corresponding path program 1 times [2020-12-22 19:00:59,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:59,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766028851] [2020-12-22 19:00:59,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:59,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:00:59,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766028851] [2020-12-22 19:00:59,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:59,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 19:00:59,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284600337] [2020-12-22 19:00:59,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 19:00:59,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:59,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 19:00:59,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:00:59,787 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 9 states. [2020-12-22 19:00:59,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:59,989 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2020-12-22 19:00:59,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 19:00:59,990 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-12-22 19:00:59,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:59,990 INFO L225 Difference]: With dead ends: 78 [2020-12-22 19:00:59,991 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 19:00:59,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-12-22 19:00:59,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 19:00:59,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-22 19:00:59,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 19:00:59,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-12-22 19:00:59,993 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 29 [2020-12-22 19:00:59,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:59,994 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-12-22 19:00:59,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 19:00:59,994 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-12-22 19:00:59,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 19:00:59,994 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:59,995 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:59,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 19:00:59,995 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:59,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:59,996 INFO L82 PathProgramCache]: Analyzing trace with hash 795888502, now seen corresponding path program 1 times [2020-12-22 19:00:59,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:59,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177797772] [2020-12-22 19:00:59,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:00,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:00,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:01:00,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177797772] [2020-12-22 19:01:00,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612699300] [2020-12-22 19:01:00,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:00,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:00,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-22 19:01:00,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:00,449 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 19:01:00,450 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:00,462 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:00,465 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 19:01:00,465 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:26 [2020-12-22 19:01:00,519 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:01:00,531 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:00,532 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 40 [2020-12-22 19:01:00,535 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:00,566 INFO L625 ElimStorePlain]: treesize reduction 19, result has 61.2 percent of original size [2020-12-22 19:01:00,570 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 19:01:00,570 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:30 [2020-12-22 19:01:00,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:01:00,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:00,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2020-12-22 19:01:00,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269306249] [2020-12-22 19:01:00,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 19:01:00,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:00,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 19:01:00,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-22 19:01:00,932 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 21 states. [2020-12-22 19:01:01,994 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-12-22 19:01:02,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:02,089 INFO L93 Difference]: Finished difference Result 104 states and 111 transitions. [2020-12-22 19:01:02,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 19:01:02,089 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2020-12-22 19:01:02,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:02,090 INFO L225 Difference]: With dead ends: 104 [2020-12-22 19:01:02,090 INFO L226 Difference]: Without dead ends: 78 [2020-12-22 19:01:02,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=253, Invalid=937, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 19:01:02,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-22 19:01:02,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2020-12-22 19:01:02,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 19:01:02,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-12-22 19:01:02,093 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 29 [2020-12-22 19:01:02,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:02,094 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-12-22 19:01:02,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 19:01:02,094 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-12-22 19:01:02,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 19:01:02,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:02,095 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:02,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 19:01:02,304 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:01:02,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:02,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1769750649, now seen corresponding path program 2 times [2020-12-22 19:01:02,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:02,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917410039] [2020-12-22 19:01:02,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:02,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:02,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:01:02,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917410039] [2020-12-22 19:01:02,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713520505] [2020-12-22 19:01:02,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:02,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:01:02,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:02,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 19:01:02,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:02,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:01:02,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:02,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2020-12-22 19:01:02,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506518362] [2020-12-22 19:01:02,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 19:01:02,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:02,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 19:01:02,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-12-22 19:01:02,675 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 15 states. [2020-12-22 19:01:02,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:02,985 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-12-22 19:01:02,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 19:01:02,986 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2020-12-22 19:01:02,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:02,986 INFO L225 Difference]: With dead ends: 70 [2020-12-22 19:01:02,986 INFO L226 Difference]: Without dead ends: 70 [2020-12-22 19:01:02,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-12-22 19:01:02,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-22 19:01:02,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2020-12-22 19:01:02,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-22 19:01:02,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2020-12-22 19:01:02,989 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 33 [2020-12-22 19:01:02,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:02,990 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2020-12-22 19:01:02,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 19:01:02,990 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2020-12-22 19:01:02,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 19:01:02,990 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:02,991 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:03,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:03,205 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:01:03,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:03,206 INFO L82 PathProgramCache]: Analyzing trace with hash -972218812, now seen corresponding path program 1 times [2020-12-22 19:01:03,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:03,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117629098] [2020-12-22 19:01:03,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:03,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 19:01:03,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117629098] [2020-12-22 19:01:03,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:01:03,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 19:01:03,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926045791] [2020-12-22 19:01:03,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 19:01:03,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:03,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 19:01:03,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 19:01:03,389 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 10 states. [2020-12-22 19:01:03,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:03,665 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2020-12-22 19:01:03,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 19:01:03,666 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-12-22 19:01:03,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:03,667 INFO L225 Difference]: With dead ends: 88 [2020-12-22 19:01:03,667 INFO L226 Difference]: Without dead ends: 88 [2020-12-22 19:01:03,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2020-12-22 19:01:03,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-22 19:01:03,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-12-22 19:01:03,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-22 19:01:03,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2020-12-22 19:01:03,671 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 34 [2020-12-22 19:01:03,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:03,671 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2020-12-22 19:01:03,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 19:01:03,671 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2020-12-22 19:01:03,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 19:01:03,672 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:03,672 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:03,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 19:01:03,673 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:01:03,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:03,673 INFO L82 PathProgramCache]: Analyzing trace with hash -270618938, now seen corresponding path program 1 times [2020-12-22 19:01:03,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:03,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113110610] [2020-12-22 19:01:03,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:03,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:03,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:01:03,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113110610] [2020-12-22 19:01:03,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640541857] [2020-12-22 19:01:03,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:01:03,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:03,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 19:01:03,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:04,075 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 19:01:04,076 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:04,083 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:04,086 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 19:01:04,086 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 19:01:04,148 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 19:01:04,150 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:04,152 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:04,152 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 19:01:04,153 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-22 19:01:04,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:01:04,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:04,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2020-12-22 19:01:04,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966115014] [2020-12-22 19:01:04,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 19:01:04,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:04,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 19:01:04,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-12-22 19:01:04,163 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand 17 states. [2020-12-22 19:01:04,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:04,850 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2020-12-22 19:01:04,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 19:01:04,850 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2020-12-22 19:01:04,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:04,854 INFO L225 Difference]: With dead ends: 116 [2020-12-22 19:01:04,854 INFO L226 Difference]: Without dead ends: 116 [2020-12-22 19:01:04,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2020-12-22 19:01:04,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-22 19:01:04,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 90. [2020-12-22 19:01:04,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-22 19:01:04,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2020-12-22 19:01:04,865 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 34 [2020-12-22 19:01:04,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:04,865 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2020-12-22 19:01:04,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 19:01:04,865 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2020-12-22 19:01:04,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 19:01:04,867 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:04,867 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:05,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:05,083 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:01:05,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:05,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1855891613, now seen corresponding path program 2 times [2020-12-22 19:01:05,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:05,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016948987] [2020-12-22 19:01:05,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:05,257 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:01:05,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016948987] [2020-12-22 19:01:05,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699438421] [2020-12-22 19:01:05,258 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 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 19:01:05,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:01:05,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:05,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 19:01:05,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:05,370 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:05,370 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:01:05,372 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:05,389 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:01:05,391 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:05,392 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 19:01:05,634 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:01:05,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:05,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2020-12-22 19:01:05,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926601465] [2020-12-22 19:01:05,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 19:01:05,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:05,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 19:01:05,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2020-12-22 19:01:05,636 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand 21 states. [2020-12-22 19:01:06,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:06,156 INFO L93 Difference]: Finished difference Result 112 states and 124 transitions. [2020-12-22 19:01:06,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 19:01:06,157 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 38 [2020-12-22 19:01:06,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:06,158 INFO L225 Difference]: With dead ends: 112 [2020-12-22 19:01:06,158 INFO L226 Difference]: Without dead ends: 112 [2020-12-22 19:01:06,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2020-12-22 19:01:06,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-22 19:01:06,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 100. [2020-12-22 19:01:06,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-22 19:01:06,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 111 transitions. [2020-12-22 19:01:06,162 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 111 transitions. Word has length 38 [2020-12-22 19:01:06,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:06,162 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 111 transitions. [2020-12-22 19:01:06,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 19:01:06,162 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 111 transitions. [2020-12-22 19:01:06,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 19:01:06,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:06,163 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:06,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:06,378 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:01:06,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:06,379 INFO L82 PathProgramCache]: Analyzing trace with hash 759394243, now seen corresponding path program 3 times [2020-12-22 19:01:06,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:06,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182846126] [2020-12-22 19:01:06,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:06,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:06,925 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:01:06,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182846126] [2020-12-22 19:01:06,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589024225] [2020-12-22 19:01:06,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:07,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 19:01:07,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:07,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 19:01:07,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:07,053 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_20|], 1=[|v_#valid_25|]} [2020-12-22 19:01:07,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:01:07,059 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 19:01:07,060 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:07,069 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:07,075 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2020-12-22 19:01:07,076 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:07,085 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:07,086 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:07,086 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:21 [2020-12-22 19:01:07,252 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-22 19:01:07,253 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:07,262 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:07,263 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:07,263 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2020-12-22 19:01:07,315 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2020-12-22 19:01:07,323 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:07,333 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:07,337 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 19:01:07,337 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:33 [2020-12-22 19:01:07,717 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2020-12-22 19:01:07,722 INFO L547 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 19:01:07,736 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:07,742 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:01:07,743 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 10 [2020-12-22 19:01:07,744 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:07,753 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:07,755 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:07,755 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:50, output treesize:3 [2020-12-22 19:01:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:01:07,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:07,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2020-12-22 19:01:07,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690495778] [2020-12-22 19:01:07,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 19:01:07,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:07,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 19:01:07,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2020-12-22 19:01:07,779 INFO L87 Difference]: Start difference. First operand 100 states and 111 transitions. Second operand 26 states. [2020-12-22 19:01:08,065 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2020-12-22 19:01:11,173 WARN L197 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-12-22 19:01:11,500 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2020-12-22 19:01:11,864 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-12-22 19:01:12,034 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-12-22 19:01:12,274 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-12-22 19:01:12,544 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2020-12-22 19:01:12,796 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-12-22 19:01:13,336 WARN L197 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-12-22 19:01:15,732 WARN L197 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-22 19:01:15,987 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2020-12-22 19:01:16,310 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-12-22 19:01:16,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:16,346 INFO L93 Difference]: Finished difference Result 206 states and 220 transitions. [2020-12-22 19:01:16,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 19:01:16,347 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 41 [2020-12-22 19:01:16,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:16,348 INFO L225 Difference]: With dead ends: 206 [2020-12-22 19:01:16,348 INFO L226 Difference]: Without dead ends: 166 [2020-12-22 19:01:16,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=460, Invalid=1990, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 19:01:16,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-12-22 19:01:16,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 137. [2020-12-22 19:01:16,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-22 19:01:16,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2020-12-22 19:01:16,354 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 41 [2020-12-22 19:01:16,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:16,354 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2020-12-22 19:01:16,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 19:01:16,354 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2020-12-22 19:01:16,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 19:01:16,355 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:16,355 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:16,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 19:01:16,569 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:01:16,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:16,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1122231478, now seen corresponding path program 3 times [2020-12-22 19:01:16,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:16,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169593358] [2020-12-22 19:01:16,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:16,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:16,955 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:01:16,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169593358] [2020-12-22 19:01:16,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592700230] [2020-12-22 19:01:16,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:17,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 19:01:17,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:17,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 19:01:17,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:17,065 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:17,066 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:01:17,067 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:17,086 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:01:17,088 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:17,089 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 19:01:17,262 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 19:01:17,263 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:17,271 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:17,271 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:17,272 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2020-12-22 19:01:17,555 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 25 treesize of output 19 [2020-12-22 19:01:17,557 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:01:17,571 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:17,576 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:01:17,578 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:17,578 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 10 [2020-12-22 19:01:17,579 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:17,589 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:17,592 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:17,592 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:40, output treesize:3 [2020-12-22 19:01:17,605 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:01:17,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:17,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2020-12-22 19:01:17,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397578020] [2020-12-22 19:01:17,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 19:01:17,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:17,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 19:01:17,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2020-12-22 19:01:17,608 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand 26 states. [2020-12-22 19:01:19,090 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-12-22 19:01:19,597 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-12-22 19:01:19,769 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-12-22 19:01:20,091 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-12-22 19:01:20,232 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-12-22 19:01:20,417 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-12-22 19:01:20,605 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-12-22 19:01:20,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:20,818 INFO L93 Difference]: Finished difference Result 207 states and 223 transitions. [2020-12-22 19:01:20,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 19:01:20,819 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 43 [2020-12-22 19:01:20,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:20,820 INFO L225 Difference]: With dead ends: 207 [2020-12-22 19:01:20,820 INFO L226 Difference]: Without dead ends: 191 [2020-12-22 19:01:20,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=531, Invalid=2121, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 19:01:20,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-12-22 19:01:20,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 176. [2020-12-22 19:01:20,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-12-22 19:01:20,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 194 transitions. [2020-12-22 19:01:20,827 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 194 transitions. Word has length 43 [2020-12-22 19:01:20,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:20,828 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 194 transitions. [2020-12-22 19:01:20,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 19:01:20,828 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 194 transitions. [2020-12-22 19:01:20,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 19:01:20,828 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:20,829 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:21,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 19:01:21,043 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:01:21,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:21,044 INFO L82 PathProgramCache]: Analyzing trace with hash -544147386, now seen corresponding path program 4 times [2020-12-22 19:01:21,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:21,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664921851] [2020-12-22 19:01:21,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:21,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:21,193 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:01:21,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664921851] [2020-12-22 19:01:21,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543979221] [2020-12-22 19:01:21,194 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 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 19:01:21,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:01:21,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:21,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 19:01:21,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:21,427 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:01:21,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:21,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-12-22 19:01:21,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199838823] [2020-12-22 19:01:21,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 19:01:21,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:21,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 19:01:21,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 19:01:21,429 INFO L87 Difference]: Start difference. First operand 176 states and 194 transitions. Second operand 17 states. [2020-12-22 19:01:21,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:21,875 INFO L93 Difference]: Finished difference Result 224 states and 243 transitions. [2020-12-22 19:01:21,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 19:01:21,876 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2020-12-22 19:01:21,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:21,877 INFO L225 Difference]: With dead ends: 224 [2020-12-22 19:01:21,878 INFO L226 Difference]: Without dead ends: 224 [2020-12-22 19:01:21,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2020-12-22 19:01:21,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-12-22 19:01:21,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 213. [2020-12-22 19:01:21,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-12-22 19:01:21,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 235 transitions. [2020-12-22 19:01:21,884 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 235 transitions. Word has length 45 [2020-12-22 19:01:21,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:21,884 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 235 transitions. [2020-12-22 19:01:21,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 19:01:21,885 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 235 transitions. [2020-12-22 19:01:21,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 19:01:21,885 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:21,886 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:22,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 19:01:22,099 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:01:22,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:22,100 INFO L82 PathProgramCache]: Analyzing trace with hash 921214137, now seen corresponding path program 4 times [2020-12-22 19:01:22,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:22,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175936502] [2020-12-22 19:01:22,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:01:22,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175936502] [2020-12-22 19:01:22,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558983781] [2020-12-22 19:01:22,313 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 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 19:01:22,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:01:22,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:22,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 19:01:22,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:22,424 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:22,425 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:01:22,426 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:22,444 INFO L625 ElimStorePlain]: treesize reduction 10, result has 60.0 percent of original size [2020-12-22 19:01:22,447 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:22,448 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:9, output treesize:1 [2020-12-22 19:01:22,638 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:01:22,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:22,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2020-12-22 19:01:22,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55580634] [2020-12-22 19:01:22,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 19:01:22,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:22,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 19:01:22,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-12-22 19:01:22,641 INFO L87 Difference]: Start difference. First operand 213 states and 235 transitions. Second operand 21 states. [2020-12-22 19:01:23,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:23,313 INFO L93 Difference]: Finished difference Result 265 states and 291 transitions. [2020-12-22 19:01:23,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 19:01:23,314 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 47 [2020-12-22 19:01:23,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:23,316 INFO L225 Difference]: With dead ends: 265 [2020-12-22 19:01:23,316 INFO L226 Difference]: Without dead ends: 265 [2020-12-22 19:01:23,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2020-12-22 19:01:23,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-12-22 19:01:23,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 233. [2020-12-22 19:01:23,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-12-22 19:01:23,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 258 transitions. [2020-12-22 19:01:23,325 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 258 transitions. Word has length 47 [2020-12-22 19:01:23,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:23,325 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 258 transitions. [2020-12-22 19:01:23,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 19:01:23,326 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 258 transitions. [2020-12-22 19:01:23,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 19:01:23,326 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:23,327 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:23,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:23,542 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:01:23,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:23,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1256228128, now seen corresponding path program 5 times [2020-12-22 19:01:23,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:23,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259558067] [2020-12-22 19:01:23,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:23,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:24,728 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:01:24,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259558067] [2020-12-22 19:01:24,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534330733] [2020-12-22 19:01:24,729 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 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 19:01:24,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 19:01:24,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:24,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-22 19:01:24,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:24,845 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:24,846 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:01:24,852 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:24,873 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:01:24,877 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:24,878 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 19:01:25,136 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 19:01:25,137 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:25,143 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:25,144 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:25,144 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2020-12-22 19:01:25,554 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:25,554 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 21 treesize of output 21 [2020-12-22 19:01:25,556 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 19:01:25,573 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:25,574 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:25,574 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:19 [2020-12-22 19:01:25,864 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:01:25,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:25,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 16] total 38 [2020-12-22 19:01:25,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677470745] [2020-12-22 19:01:25,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 19:01:25,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:25,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 19:01:25,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1313, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 19:01:25,867 INFO L87 Difference]: Start difference. First operand 233 states and 258 transitions. Second operand 38 states. [2020-12-22 19:01:26,292 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2020-12-22 19:01:26,619 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2020-12-22 19:01:26,789 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 19:01:27,055 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-12-22 19:01:27,331 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2020-12-22 19:01:27,853 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2020-12-22 19:01:28,613 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-12-22 19:01:28,931 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2020-12-22 19:01:29,254 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-12-22 19:01:29,421 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-22 19:01:29,745 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-12-22 19:01:30,028 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-12-22 19:01:30,241 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-12-22 19:01:30,634 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-12-22 19:01:30,981 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-12-22 19:01:31,378 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-12-22 19:01:31,738 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-12-22 19:01:31,997 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2020-12-22 19:01:32,417 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2020-12-22 19:01:32,837 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-12-22 19:01:33,280 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-12-22 19:01:33,455 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-12-22 19:01:33,741 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-12-22 19:01:33,958 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-12-22 19:01:34,223 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-12-22 19:01:34,725 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-12-22 19:01:35,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:35,174 INFO L93 Difference]: Finished difference Result 331 states and 359 transitions. [2020-12-22 19:01:35,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-22 19:01:35,175 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 52 [2020-12-22 19:01:35,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:35,177 INFO L225 Difference]: With dead ends: 331 [2020-12-22 19:01:35,178 INFO L226 Difference]: Without dead ends: 310 [2020-12-22 19:01:35,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1015, Invalid=6467, Unknown=0, NotChecked=0, Total=7482 [2020-12-22 19:01:35,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-12-22 19:01:35,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 257. [2020-12-22 19:01:35,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-12-22 19:01:35,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 285 transitions. [2020-12-22 19:01:35,187 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 285 transitions. Word has length 52 [2020-12-22 19:01:35,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:35,187 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 285 transitions. [2020-12-22 19:01:35,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 19:01:35,188 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 285 transitions. [2020-12-22 19:01:35,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 19:01:35,188 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:35,189 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:35,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 19:01:35,404 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:01:35,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:35,405 INFO L82 PathProgramCache]: Analyzing trace with hash -176289136, now seen corresponding path program 5 times [2020-12-22 19:01:35,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:35,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58612858] [2020-12-22 19:01:35,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:35,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:35,737 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:01:35,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58612858] [2020-12-22 19:01:35,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029811864] [2020-12-22 19:01:35,737 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 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 19:01:35,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 19:01:35,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:35,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-22 19:01:35,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:36,099 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 19:01:36,100 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:36,109 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:36,111 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 19:01:36,112 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:23 [2020-12-22 19:01:36,205 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:36,205 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 63 [2020-12-22 19:01:36,207 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:36,252 INFO L625 ElimStorePlain]: treesize reduction 35, result has 48.5 percent of original size [2020-12-22 19:01:36,255 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 19:01:36,255 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:33 [2020-12-22 19:01:37,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:01:37,389 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:01:37,455 INFO L348 Elim1Store]: treesize reduction 14, result has 78.8 percent of original size [2020-12-22 19:01:37,456 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 41 treesize of output 68 [2020-12-22 19:01:37,458 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:01:37,462 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:37,471 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:37,474 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:37,475 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:47, output treesize:3 [2020-12-22 19:01:37,502 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:01:37,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:37,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23] total 35 [2020-12-22 19:01:37,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749092550] [2020-12-22 19:01:37,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 19:01:37,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:37,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 19:01:37,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1103, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 19:01:37,505 INFO L87 Difference]: Start difference. First operand 257 states and 285 transitions. Second operand 35 states. [2020-12-22 19:01:39,002 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-12-22 19:01:39,206 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-12-22 19:01:39,420 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-12-22 19:01:39,638 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-12-22 19:01:39,859 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2020-12-22 19:01:40,135 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2020-12-22 19:01:40,381 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2020-12-22 19:01:40,895 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-12-22 19:01:41,757 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-12-22 19:01:42,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:42,121 INFO L93 Difference]: Finished difference Result 457 states and 499 transitions. [2020-12-22 19:01:42,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 19:01:42,122 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 53 [2020-12-22 19:01:42,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:42,124 INFO L225 Difference]: With dead ends: 457 [2020-12-22 19:01:42,124 INFO L226 Difference]: Without dead ends: 370 [2020-12-22 19:01:42,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=507, Invalid=3525, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 19:01:42,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-12-22 19:01:42,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 308. [2020-12-22 19:01:42,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-12-22 19:01:42,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 343 transitions. [2020-12-22 19:01:42,134 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 343 transitions. Word has length 53 [2020-12-22 19:01:42,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:42,135 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 343 transitions. [2020-12-22 19:01:42,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 19:01:42,135 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 343 transitions. [2020-12-22 19:01:42,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 19:01:42,136 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:42,136 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:42,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 19:01:42,351 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:01:42,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:42,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1154213523, now seen corresponding path program 6 times [2020-12-22 19:01:42,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:42,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813921922] [2020-12-22 19:01:42,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:42,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:42,552 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:01:42,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813921922] [2020-12-22 19:01:42,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739585279] [2020-12-22 19:01:42,553 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 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 19:01:42,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-22 19:01:42,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:42,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 19:01:42,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:42,888 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:01:42,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:42,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2020-12-22 19:01:42,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399705584] [2020-12-22 19:01:42,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 19:01:42,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:42,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 19:01:42,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2020-12-22 19:01:42,890 INFO L87 Difference]: Start difference. First operand 308 states and 343 transitions. Second operand 19 states. [2020-12-22 19:01:43,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:43,487 INFO L93 Difference]: Finished difference Result 394 states and 431 transitions. [2020-12-22 19:01:43,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 19:01:43,488 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 57 [2020-12-22 19:01:43,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:43,491 INFO L225 Difference]: With dead ends: 394 [2020-12-22 19:01:43,491 INFO L226 Difference]: Without dead ends: 394 [2020-12-22 19:01:43,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2020-12-22 19:01:43,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-12-22 19:01:43,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 355. [2020-12-22 19:01:43,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-12-22 19:01:43,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 396 transitions. [2020-12-22 19:01:43,501 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 396 transitions. Word has length 57 [2020-12-22 19:01:43,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:43,501 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 396 transitions. [2020-12-22 19:01:43,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 19:01:43,501 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 396 transitions. [2020-12-22 19:01:43,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 19:01:43,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:43,502 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:43,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 19:01:43,716 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:01:43,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:43,716 INFO L82 PathProgramCache]: Analyzing trace with hash 206683100, now seen corresponding path program 6 times [2020-12-22 19:01:43,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:43,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026710530] [2020-12-22 19:01:43,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:43,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:44,087 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:01:44,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026710530] [2020-12-22 19:01:44,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072417038] [2020-12-22 19:01:44,088 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 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 19:01:44,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-22 19:01:44,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:44,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-22 19:01:44,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:44,252 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:44,253 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:01:44,254 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:44,274 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:01:44,276 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:44,276 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 19:01:44,577 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 19:01:44,578 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:44,586 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:44,587 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:44,587 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2020-12-22 19:01:45,101 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 25 treesize of output 19 [2020-12-22 19:01:45,103 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:01:45,119 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:45,125 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:01:45,127 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:45,128 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 18 treesize of output 10 [2020-12-22 19:01:45,129 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:45,141 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:45,143 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:45,144 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:40, output treesize:3 [2020-12-22 19:01:45,170 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 29 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:01:45,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:45,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 34 [2020-12-22 19:01:45,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694851016] [2020-12-22 19:01:45,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 19:01:45,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:45,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 19:01:45,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1022, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 19:01:45,173 INFO L87 Difference]: Start difference. First operand 355 states and 396 transitions. Second operand 34 states. [2020-12-22 19:01:48,123 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-12-22 19:01:48,288 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-12-22 19:01:48,797 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-12-22 19:01:49,384 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-12-22 19:01:49,730 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-22 19:01:49,922 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-12-22 19:01:50,767 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-22 19:01:51,506 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-12-22 19:01:52,125 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-12-22 19:01:52,407 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-12-22 19:01:52,567 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-12-22 19:01:52,769 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-22 19:01:53,026 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-12-22 19:01:53,254 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-12-22 19:01:53,450 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-12-22 19:01:53,661 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-12-22 19:01:53,864 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-12-22 19:01:54,100 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-12-22 19:01:54,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:54,628 INFO L93 Difference]: Finished difference Result 807 states and 879 transitions. [2020-12-22 19:01:54,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-22 19:01:54,629 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 61 [2020-12-22 19:01:54,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:54,633 INFO L225 Difference]: With dead ends: 807 [2020-12-22 19:01:54,633 INFO L226 Difference]: Without dead ends: 679 [2020-12-22 19:01:54,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1911 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=1354, Invalid=7388, Unknown=0, NotChecked=0, Total=8742 [2020-12-22 19:01:54,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2020-12-22 19:01:54,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 472. [2020-12-22 19:01:54,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 472 states. [2020-12-22 19:01:54,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 528 transitions. [2020-12-22 19:01:54,649 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 528 transitions. Word has length 61 [2020-12-22 19:01:54,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:54,650 INFO L481 AbstractCegarLoop]: Abstraction has 472 states and 528 transitions. [2020-12-22 19:01:54,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 19:01:54,650 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 528 transitions. [2020-12-22 19:01:54,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 19:01:54,651 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:54,651 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:54,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:54,867 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:01:54,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:54,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1199547427, now seen corresponding path program 7 times [2020-12-22 19:01:54,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:54,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824734902] [2020-12-22 19:01:54,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:54,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:55,274 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 20 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:01:55,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824734902] [2020-12-22 19:01:55,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954699624] [2020-12-22 19:01:55,275 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 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 19:01:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:55,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-22 19:01:55,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:55,393 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2020-12-22 19:01:55,395 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:55,400 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:55,401 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:55,401 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-22 19:01:55,661 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 19:01:55,662 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:55,671 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:55,673 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 19:01:55,673 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-22 19:01:55,736 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2020-12-22 19:01:55,738 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:55,751 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:55,753 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-22 19:01:55,753 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2020-12-22 19:01:56,425 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:56,425 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2020-12-22 19:01:56,427 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 19:01:56,446 INFO L625 ElimStorePlain]: treesize reduction 5, result has 73.7 percent of original size [2020-12-22 19:01:56,449 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:56,449 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:38, output treesize:3 [2020-12-22 19:01:56,478 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 20 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:01:56,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:56,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2020-12-22 19:01:56,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352748668] [2020-12-22 19:01:56,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 19:01:56,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:56,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 19:01:56,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=915, Unknown=0, NotChecked=0, Total=992 [2020-12-22 19:01:56,480 INFO L87 Difference]: Start difference. First operand 472 states and 528 transitions. Second operand 32 states. [2020-12-22 19:02:01,811 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-12-22 19:02:05,962 WARN L197 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:02:10,206 WARN L197 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:02:14,597 WARN L197 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:02:18,856 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-12-22 19:02:23,018 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-12-22 19:02:27,193 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-12-22 19:02:27,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:27,207 INFO L93 Difference]: Finished difference Result 783 states and 865 transitions. [2020-12-22 19:02:27,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 19:02:27,208 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 65 [2020-12-22 19:02:27,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:27,212 INFO L225 Difference]: With dead ends: 783 [2020-12-22 19:02:27,212 INFO L226 Difference]: Without dead ends: 620 [2020-12-22 19:02:27,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 30.4s TimeCoverageRelationStatistics Valid=283, Invalid=2167, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 19:02:27,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2020-12-22 19:02:27,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 531. [2020-12-22 19:02:27,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 531 states. [2020-12-22 19:02:27,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 594 transitions. [2020-12-22 19:02:27,228 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 594 transitions. Word has length 65 [2020-12-22 19:02:27,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:27,228 INFO L481 AbstractCegarLoop]: Abstraction has 531 states and 594 transitions. [2020-12-22 19:02:27,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 19:02:27,229 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 594 transitions. [2020-12-22 19:02:27,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 19:02:27,230 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:27,230 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:27,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:02:27,444 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:27,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:27,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1721211167, now seen corresponding path program 7 times [2020-12-22 19:02:27,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:27,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811786862] [2020-12-22 19:02:27,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:27,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:27,802 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 15 proven. 68 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:02:27,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811786862] [2020-12-22 19:02:27,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101076921] [2020-12-22 19:02:27,803 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 19:02:27,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:27,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-22 19:02:27,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:27,924 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:27,925 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:02:27,926 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:27,947 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:02:27,949 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:27,950 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 19:02:28,564 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:02:28,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:28,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2020-12-22 19:02:28,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15808735] [2020-12-22 19:02:28,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 19:02:28,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:28,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 19:02:28,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 19:02:28,567 INFO L87 Difference]: Start difference. First operand 531 states and 594 transitions. Second operand 33 states. [2020-12-22 19:02:29,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:29,911 INFO L93 Difference]: Finished difference Result 773 states and 857 transitions. [2020-12-22 19:02:29,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 19:02:29,911 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 65 [2020-12-22 19:02:29,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:29,915 INFO L225 Difference]: With dead ends: 773 [2020-12-22 19:02:29,916 INFO L226 Difference]: Without dead ends: 773 [2020-12-22 19:02:29,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=315, Invalid=1407, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 19:02:29,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2020-12-22 19:02:29,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 566. [2020-12-22 19:02:29,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2020-12-22 19:02:29,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 635 transitions. [2020-12-22 19:02:29,938 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 635 transitions. Word has length 65 [2020-12-22 19:02:29,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:29,938 INFO L481 AbstractCegarLoop]: Abstraction has 566 states and 635 transitions. [2020-12-22 19:02:29,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 19:02:29,938 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 635 transitions. [2020-12-22 19:02:29,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 19:02:29,939 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:29,940 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:30,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-22 19:02:30,154 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:30,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:30,155 INFO L82 PathProgramCache]: Analyzing trace with hash -512930976, now seen corresponding path program 8 times [2020-12-22 19:02:30,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:30,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866885920] [2020-12-22 19:02:30,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:30,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:30,426 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:02:30,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866885920] [2020-12-22 19:02:30,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977372562] [2020-12-22 19:02:30,427 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 19:02:30,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:02:30,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:02:30,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-22 19:02:30,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:30,874 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:02:30,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:30,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2020-12-22 19:02:30,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437073178] [2020-12-22 19:02:30,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 19:02:30,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:30,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 19:02:30,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2020-12-22 19:02:30,876 INFO L87 Difference]: Start difference. First operand 566 states and 635 transitions. Second operand 24 states. [2020-12-22 19:02:31,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:31,873 INFO L93 Difference]: Finished difference Result 751 states and 831 transitions. [2020-12-22 19:02:31,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 19:02:31,874 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 69 [2020-12-22 19:02:31,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:31,878 INFO L225 Difference]: With dead ends: 751 [2020-12-22 19:02:31,879 INFO L226 Difference]: Without dead ends: 751 [2020-12-22 19:02:31,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 19:02:31,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2020-12-22 19:02:31,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 641. [2020-12-22 19:02:31,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 641 states. [2020-12-22 19:02:31,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 720 transitions. [2020-12-22 19:02:31,895 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 720 transitions. Word has length 69 [2020-12-22 19:02:31,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:31,896 INFO L481 AbstractCegarLoop]: Abstraction has 641 states and 720 transitions. [2020-12-22 19:02:31,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 19:02:31,896 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 720 transitions. [2020-12-22 19:02:31,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 19:02:31,897 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:31,897 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:32,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 19:02:32,113 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:32,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:32,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1799182458, now seen corresponding path program 8 times [2020-12-22 19:02:32,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:32,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587172890] [2020-12-22 19:02:32,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:32,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:32,560 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:02:32,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587172890] [2020-12-22 19:02:32,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569367669] [2020-12-22 19:02:32,561 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 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 19:02:32,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:02:32,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:02:32,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-22 19:02:32,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:32,970 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 19:02:32,975 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:32,982 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:32,983 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 19:02:32,983 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 19:02:33,261 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 19:02:33,263 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:33,265 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:33,265 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 19:02:33,265 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-22 19:02:33,277 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:02:33,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:33,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 33 [2020-12-22 19:02:33,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776708406] [2020-12-22 19:02:33,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 19:02:33,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:33,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 19:02:33,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 19:02:33,279 INFO L87 Difference]: Start difference. First operand 641 states and 720 transitions. Second operand 33 states. [2020-12-22 19:02:37,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:37,020 INFO L93 Difference]: Finished difference Result 1168 states and 1290 transitions. [2020-12-22 19:02:37,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 19:02:37,021 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 70 [2020-12-22 19:02:37,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:37,026 INFO L225 Difference]: With dead ends: 1168 [2020-12-22 19:02:37,026 INFO L226 Difference]: Without dead ends: 1029 [2020-12-22 19:02:37,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=538, Invalid=3884, Unknown=0, NotChecked=0, Total=4422 [2020-12-22 19:02:37,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2020-12-22 19:02:37,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 802. [2020-12-22 19:02:37,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 802 states. [2020-12-22 19:02:37,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 903 transitions. [2020-12-22 19:02:37,046 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 903 transitions. Word has length 70 [2020-12-22 19:02:37,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:37,047 INFO L481 AbstractCegarLoop]: Abstraction has 802 states and 903 transitions. [2020-12-22 19:02:37,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 19:02:37,047 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 903 transitions. [2020-12-22 19:02:37,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 19:02:37,048 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:37,048 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:37,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:02:37,263 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:37,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:37,264 INFO L82 PathProgramCache]: Analyzing trace with hash 611890839, now seen corresponding path program 9 times [2020-12-22 19:02:37,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:37,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121675425] [2020-12-22 19:02:37,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:37,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:37,653 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 28 proven. 98 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:02:37,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121675425] [2020-12-22 19:02:37,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999136440] [2020-12-22 19:02:37,654 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 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 19:02:37,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 19:02:37,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:02:37,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-22 19:02:37,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:37,795 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:37,796 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:02:37,797 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:37,816 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:02:37,818 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:37,819 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 19:02:37,875 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 19:02:37,876 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:37,879 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:37,879 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:37,880 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-22 19:02:38,054 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:38,055 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 21 treesize of output 21 [2020-12-22 19:02:38,056 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 19:02:38,069 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:38,070 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:38,071 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:19 [2020-12-22 19:02:38,303 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2020-12-22 19:02:38,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:38,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 27 [2020-12-22 19:02:38,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289494631] [2020-12-22 19:02:38,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 19:02:38,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:38,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 19:02:38,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2020-12-22 19:02:38,315 INFO L87 Difference]: Start difference. First operand 802 states and 903 transitions. Second operand 28 states. [2020-12-22 19:02:41,634 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 19:02:42,634 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 19:02:43,016 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 19:02:44,500 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 19:02:45,561 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 19:02:46,361 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 19:02:46,638 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 19:02:46,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:46,961 INFO L93 Difference]: Finished difference Result 1085 states and 1197 transitions. [2020-12-22 19:02:46,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-22 19:02:46,962 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 74 [2020-12-22 19:02:46,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:46,966 INFO L225 Difference]: With dead ends: 1085 [2020-12-22 19:02:46,966 INFO L226 Difference]: Without dead ends: 851 [2020-12-22 19:02:46,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1584 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=2210, Invalid=7102, Unknown=0, NotChecked=0, Total=9312 [2020-12-22 19:02:46,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2020-12-22 19:02:46,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 511. [2020-12-22 19:02:46,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-12-22 19:02:46,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 569 transitions. [2020-12-22 19:02:46,983 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 569 transitions. Word has length 74 [2020-12-22 19:02:46,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:46,983 INFO L481 AbstractCegarLoop]: Abstraction has 511 states and 569 transitions. [2020-12-22 19:02:46,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 19:02:46,983 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 569 transitions. [2020-12-22 19:02:46,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 19:02:46,985 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:46,985 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:47,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 19:02:47,201 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:47,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:47,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1706384470, now seen corresponding path program 9 times [2020-12-22 19:02:47,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:47,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107516833] [2020-12-22 19:02:47,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:47,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:47,759 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 26 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:02:47,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107516833] [2020-12-22 19:02:47,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953860240] [2020-12-22 19:02:47,760 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 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 19:02:47,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 19:02:47,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:02:47,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-22 19:02:47,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:47,960 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:47,962 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:02:47,963 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:47,997 INFO L625 ElimStorePlain]: treesize reduction 10, result has 70.6 percent of original size [2020-12-22 19:02:47,998 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:47,998 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:24 [2020-12-22 19:02:48,659 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 19:02:48,671 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 19:02:48,672 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:48,679 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 19:02:48,680 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:48,719 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:48,721 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 2 xjuncts. [2020-12-22 19:02:48,722 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:74, output treesize:66 [2020-12-22 19:02:48,852 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 6, 1] term [2020-12-22 19:02:48,853 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:02:48,885 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:48,886 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 58 [2020-12-22 19:02:48,888 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:48,966 INFO L625 ElimStorePlain]: treesize reduction 27, result has 74.0 percent of original size [2020-12-22 19:02:48,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:02:48,979 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2020-12-22 19:02:48,981 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:49,013 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:49,016 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2020-12-22 19:02:49,016 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:81, output treesize:73 [2020-12-22 19:02:50,176 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:02:50,178 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:02:50,182 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:02:50,184 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:02:50,187 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 19:02:50,194 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 19:02:50,210 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 24 treesize of output 18 [2020-12-22 19:02:50,212 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:02:50,224 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:50,224 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 46 treesize of output 42 [2020-12-22 19:02:50,226 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 19:02:50,227 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 19:02:50,228 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 19:02:50,232 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 19:02:50,233 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 19:02:50,234 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 19:02:50,236 INFO L547 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 19:02:50,351 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-12-22 19:02:50,351 INFO L625 ElimStorePlain]: treesize reduction 14, result has 85.6 percent of original size [2020-12-22 19:02:50,359 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:02:50,361 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:02:50,362 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2020-12-22 19:02:50,363 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:50,370 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:02:50,371 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 10 [2020-12-22 19:02:50,373 INFO L547 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:50,415 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:50,420 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:50,420 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:107, output treesize:3 [2020-12-22 19:02:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 26 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:02:50,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:50,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 37 [2020-12-22 19:02:50,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405250649] [2020-12-22 19:02:50,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 19:02:50,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:50,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 19:02:50,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1240, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 19:02:50,518 INFO L87 Difference]: Start difference. First operand 511 states and 569 transitions. Second operand 37 states. [2020-12-22 19:02:53,110 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2020-12-22 19:02:53,503 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2020-12-22 19:02:53,936 WARN L197 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 63 [2020-12-22 19:02:54,416 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2020-12-22 19:02:54,916 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2020-12-22 19:02:55,475 WARN L197 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-12-22 19:02:56,017 WARN L197 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2020-12-22 19:02:56,569 WARN L197 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-12-22 19:02:56,992 WARN L197 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 64 [2020-12-22 19:02:57,449 WARN L197 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 66 [2020-12-22 19:02:57,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:57,531 INFO L93 Difference]: Finished difference Result 1001 states and 1097 transitions. [2020-12-22 19:02:57,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-22 19:02:57,533 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 77 [2020-12-22 19:02:57,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:57,535 INFO L225 Difference]: With dead ends: 1001 [2020-12-22 19:02:57,535 INFO L226 Difference]: Without dead ends: 571 [2020-12-22 19:02:57,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=487, Invalid=4915, Unknown=0, NotChecked=0, Total=5402 [2020-12-22 19:02:57,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-12-22 19:02:57,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 519. [2020-12-22 19:02:57,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 519 states. [2020-12-22 19:02:57,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 577 transitions. [2020-12-22 19:02:57,545 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 577 transitions. Word has length 77 [2020-12-22 19:02:57,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:57,545 INFO L481 AbstractCegarLoop]: Abstraction has 519 states and 577 transitions. [2020-12-22 19:02:57,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 19:02:57,546 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 577 transitions. [2020-12-22 19:02:57,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 19:02:57,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:57,547 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:57,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:02:57,764 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:57,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:57,765 INFO L82 PathProgramCache]: Analyzing trace with hash 559244973, now seen corresponding path program 10 times [2020-12-22 19:02:57,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:57,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890723743] [2020-12-22 19:02:57,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:57,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:58,194 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 32 proven. 124 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:02:58,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890723743] [2020-12-22 19:02:58,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24876629] [2020-12-22 19:02:58,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:02:58,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:02:58,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:02:58,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-22 19:02:58,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:58,726 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 50 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:02:58,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:58,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2020-12-22 19:02:58,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958913681] [2020-12-22 19:02:58,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 19:02:58,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:58,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 19:02:58,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2020-12-22 19:02:58,730 INFO L87 Difference]: Start difference. First operand 519 states and 577 transitions. Second operand 26 states. [2020-12-22 19:02:59,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:59,701 INFO L93 Difference]: Finished difference Result 612 states and 679 transitions. [2020-12-22 19:02:59,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 19:02:59,702 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 81 [2020-12-22 19:02:59,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:59,704 INFO L225 Difference]: With dead ends: 612 [2020-12-22 19:02:59,704 INFO L226 Difference]: Without dead ends: 612 [2020-12-22 19:02:59,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=253, Invalid=937, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 19:02:59,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2020-12-22 19:02:59,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 600. [2020-12-22 19:02:59,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2020-12-22 19:02:59,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 667 transitions. [2020-12-22 19:02:59,715 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 667 transitions. Word has length 81 [2020-12-22 19:02:59,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:59,716 INFO L481 AbstractCegarLoop]: Abstraction has 600 states and 667 transitions. [2020-12-22 19:02:59,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 19:02:59,716 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 667 transitions. [2020-12-22 19:02:59,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-22 19:02:59,718 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:59,718 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:59,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 19:02:59,932 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:59,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:59,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1115496951, now seen corresponding path program 11 times [2020-12-22 19:02:59,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:59,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932800383] [2020-12-22 19:02:59,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:59,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:03:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 32 proven. 166 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:03:00,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932800383] [2020-12-22 19:03:00,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843823294] [2020-12-22 19:03:00,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:03:00,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-22 19:03:00,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:03:00,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 111 conjunts are in the unsatisfiable core [2020-12-22 19:03:00,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:03:01,405 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 19:03:01,406 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:01,423 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:01,424 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 19:03:01,425 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:23 [2020-12-22 19:03:01,564 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:01,565 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 63 [2020-12-22 19:03:01,567 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:01,615 INFO L625 ElimStorePlain]: treesize reduction 35, result has 48.5 percent of original size [2020-12-22 19:03:01,617 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 19:03:01,617 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:33 [2020-12-22 19:03:03,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:03:03,706 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:03:03,782 INFO L348 Elim1Store]: treesize reduction 14, result has 78.8 percent of original size [2020-12-22 19:03:03,782 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 41 treesize of output 68 [2020-12-22 19:03:03,785 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:03:03,787 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:03,796 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:03,799 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:03:03,799 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:47, output treesize:3 [2020-12-22 19:03:03,860 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 32 proven. 166 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:03:03,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:03:03,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 29] total 47 [2020-12-22 19:03:03,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123726821] [2020-12-22 19:03:03,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 19:03:03,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:03:03,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 19:03:03,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=2048, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 19:03:03,863 INFO L87 Difference]: Start difference. First operand 600 states and 667 transitions. Second operand 47 states. [2020-12-22 19:03:06,209 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-12-22 19:03:06,465 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-12-22 19:03:06,727 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-12-22 19:03:07,016 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-12-22 19:03:07,304 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-12-22 19:03:07,595 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-12-22 19:03:07,889 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-12-22 19:03:08,203 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2020-12-22 19:03:08,498 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-12-22 19:03:08,722 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-12-22 19:03:09,084 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-12-22 19:03:09,442 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-12-22 19:03:09,665 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-12-22 19:03:10,175 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-12-22 19:03:10,664 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-12-22 19:03:11,141 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-12-22 19:03:11,359 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-12-22 19:03:11,701 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-12-22 19:03:12,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:03:12,152 INFO L93 Difference]: Finished difference Result 1402 states and 1550 transitions. [2020-12-22 19:03:12,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 19:03:12,154 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 89 [2020-12-22 19:03:12,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:03:12,157 INFO L225 Difference]: With dead ends: 1402 [2020-12-22 19:03:12,157 INFO L226 Difference]: Without dead ends: 614 [2020-12-22 19:03:12,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=660, Invalid=6996, Unknown=0, NotChecked=0, Total=7656 [2020-12-22 19:03:12,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2020-12-22 19:03:12,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 608. [2020-12-22 19:03:12,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 608 states. [2020-12-22 19:03:12,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 675 transitions. [2020-12-22 19:03:12,168 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 675 transitions. Word has length 89 [2020-12-22 19:03:12,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:03:12,168 INFO L481 AbstractCegarLoop]: Abstraction has 608 states and 675 transitions. [2020-12-22 19:03:12,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 19:03:12,168 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 675 transitions. [2020-12-22 19:03:12,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 19:03:12,170 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:03:12,170 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:03:12,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 19:03:12,384 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:03:12,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:03:12,385 INFO L82 PathProgramCache]: Analyzing trace with hash 604272762, now seen corresponding path program 12 times [2020-12-22 19:03:12,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:03:12,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486120592] [2020-12-22 19:03:12,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:03:12,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:03:12,875 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 50 proven. 173 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:03:12,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486120592] [2020-12-22 19:03:12,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300391144] [2020-12-22 19:03:12,876 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 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 19:03:13,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-22 19:03:13,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:03:13,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-22 19:03:13,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:03:13,120 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_28|], 1=[|v_#valid_27|]} [2020-12-22 19:03:13,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:03:13,126 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 19:03:13,127 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:13,140 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:13,147 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2020-12-22 19:03:13,150 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:13,163 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:13,165 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:03:13,165 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-22 19:03:14,218 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 72 proven. 151 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:03:14,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:03:14,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2020-12-22 19:03:14,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308708433] [2020-12-22 19:03:14,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 19:03:14,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:03:14,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 19:03:14,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 19:03:14,220 INFO L87 Difference]: Start difference. First operand 608 states and 675 transitions. Second operand 36 states. [2020-12-22 19:03:16,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:03:16,824 INFO L93 Difference]: Finished difference Result 699 states and 775 transitions. [2020-12-22 19:03:16,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 19:03:16,825 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 93 [2020-12-22 19:03:16,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:03:16,827 INFO L225 Difference]: With dead ends: 699 [2020-12-22 19:03:16,827 INFO L226 Difference]: Without dead ends: 699 [2020-12-22 19:03:16,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=646, Invalid=2660, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 19:03:16,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2020-12-22 19:03:16,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 689. [2020-12-22 19:03:16,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 689 states. [2020-12-22 19:03:16,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 765 transitions. [2020-12-22 19:03:16,839 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 765 transitions. Word has length 93 [2020-12-22 19:03:16,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:03:16,840 INFO L481 AbstractCegarLoop]: Abstraction has 689 states and 765 transitions. [2020-12-22 19:03:16,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 19:03:16,840 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 765 transitions. [2020-12-22 19:03:16,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-22 19:03:16,841 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:03:16,842 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:03:17,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 19:03:17,055 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:03:17,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:03:17,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1817712324, now seen corresponding path program 13 times [2020-12-22 19:03:17,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:03:17,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472073463] [2020-12-22 19:03:17,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:03:17,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:03:17,900 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 38 proven. 235 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:03:17,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472073463] [2020-12-22 19:03:17,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725968636] [2020-12-22 19:03:17,901 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 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 19:03:18,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:03:18,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 90 conjunts are in the unsatisfiable core [2020-12-22 19:03:18,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:03:18,123 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:18,124 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:03:18,126 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:18,162 INFO L625 ElimStorePlain]: treesize reduction 10, result has 67.7 percent of original size [2020-12-22 19:03:18,165 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:03:18,165 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:12 [2020-12-22 19:03:18,961 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 19:03:18,962 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:18,976 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:18,980 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 19:03:18,980 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:25 [2020-12-22 19:03:19,157 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:19,157 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 69 [2020-12-22 19:03:19,159 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:19,199 INFO L625 ElimStorePlain]: treesize reduction 39, result has 46.6 percent of original size [2020-12-22 19:03:19,212 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-22 19:03:19,212 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:34 [2020-12-22 19:03:20,561 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:20,562 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 23 treesize of output 25 [2020-12-22 19:03:20,564 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:03:20,565 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 19:03:20,567 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 19:03:20,567 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:03:20,609 INFO L625 ElimStorePlain]: treesize reduction 4, result has 90.2 percent of original size [2020-12-22 19:03:20,612 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-22 19:03:20,613 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:42, output treesize:37 [2020-12-22 19:03:20,950 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:03:20,952 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2020-12-22 19:03:20,953 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:20,970 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:20,975 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:03:20,975 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:44, output treesize:3 [2020-12-22 19:03:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 38 proven. 235 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:03:21,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:03:21,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 27] total 47 [2020-12-22 19:03:21,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889517673] [2020-12-22 19:03:21,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 19:03:21,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:03:21,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 19:03:21,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=2044, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 19:03:21,047 INFO L87 Difference]: Start difference. First operand 689 states and 765 transitions. Second operand 47 states. [2020-12-22 19:03:24,959 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-12-22 19:03:29,398 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-12-22 19:03:29,795 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2020-12-22 19:03:33,113 WARN L197 SmtUtils]: Spent 3.20 s on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-12-22 19:03:33,532 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-12-22 19:03:33,812 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-12-22 19:03:34,131 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-12-22 19:03:34,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:03:34,242 INFO L93 Difference]: Finished difference Result 1373 states and 1505 transitions. [2020-12-22 19:03:34,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-22 19:03:34,243 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 101 [2020-12-22 19:03:34,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:03:34,247 INFO L225 Difference]: With dead ends: 1373 [2020-12-22 19:03:34,247 INFO L226 Difference]: Without dead ends: 765 [2020-12-22 19:03:34,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=643, Invalid=8476, Unknown=1, NotChecked=0, Total=9120 [2020-12-22 19:03:34,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2020-12-22 19:03:34,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 697. [2020-12-22 19:03:34,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2020-12-22 19:03:34,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 773 transitions. [2020-12-22 19:03:34,259 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 773 transitions. Word has length 101 [2020-12-22 19:03:34,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:03:34,259 INFO L481 AbstractCegarLoop]: Abstraction has 697 states and 773 transitions. [2020-12-22 19:03:34,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 19:03:34,259 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 773 transitions. [2020-12-22 19:03:34,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 19:03:34,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:03:34,261 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:03:34,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 19:03:34,476 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:03:34,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:03:34,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1285210311, now seen corresponding path program 14 times [2020-12-22 19:03:34,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:03:34,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177071988] [2020-12-22 19:03:34,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:03:34,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:03:35,000 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 72 proven. 230 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:03:35,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177071988] [2020-12-22 19:03:35,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782287315] [2020-12-22 19:03:35,000 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 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 19:03:35,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:03:35,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:03:35,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-22 19:03:35,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:03:35,779 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 91 proven. 211 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:03:35,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:03:35,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 32 [2020-12-22 19:03:35,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386121559] [2020-12-22 19:03:35,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 19:03:35,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:03:35,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 19:03:35,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 19:03:35,781 INFO L87 Difference]: Start difference. First operand 697 states and 773 transitions. Second operand 33 states. [2020-12-22 19:03:37,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:03:37,292 INFO L93 Difference]: Finished difference Result 790 states and 875 transitions. [2020-12-22 19:03:37,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 19:03:37,293 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 105 [2020-12-22 19:03:37,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:03:37,297 INFO L225 Difference]: With dead ends: 790 [2020-12-22 19:03:37,297 INFO L226 Difference]: Without dead ends: 790 [2020-12-22 19:03:37,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=424, Invalid=1556, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 19:03:37,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2020-12-22 19:03:37,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 778. [2020-12-22 19:03:37,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 778 states. [2020-12-22 19:03:37,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 863 transitions. [2020-12-22 19:03:37,307 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 863 transitions. Word has length 105 [2020-12-22 19:03:37,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:03:37,307 INFO L481 AbstractCegarLoop]: Abstraction has 778 states and 863 transitions. [2020-12-22 19:03:37,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 19:03:37,308 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 863 transitions. [2020-12-22 19:03:37,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 19:03:37,310 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:03:37,310 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:03:37,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-22 19:03:37,526 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:03:37,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:03:37,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1992016401, now seen corresponding path program 15 times [2020-12-22 19:03:37,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:03:37,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075671704] [2020-12-22 19:03:37,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:03:37,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:03:38,522 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 44 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:03:38,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075671704] [2020-12-22 19:03:38,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213644480] [2020-12-22 19:03:38,523 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 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 19:03:38,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-22 19:03:38,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:03:38,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 100 conjunts are in the unsatisfiable core [2020-12-22 19:03:38,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:03:38,752 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2020-12-22 19:03:38,754 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:38,760 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:38,760 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:03:38,761 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-22 19:03:39,460 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 19:03:39,462 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:39,474 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:39,476 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 19:03:39,476 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-22 19:03:39,594 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2020-12-22 19:03:39,595 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:39,610 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:39,612 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-22 19:03:39,612 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2020-12-22 19:03:41,518 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:41,519 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2020-12-22 19:03:41,521 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 19:03:41,545 INFO L625 ElimStorePlain]: treesize reduction 5, result has 73.7 percent of original size [2020-12-22 19:03:41,548 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:03:41,548 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:38, output treesize:3 [2020-12-22 19:03:41,625 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 44 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:03:41,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:03:41,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 48 [2020-12-22 19:03:41,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888089307] [2020-12-22 19:03:41,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 19:03:41,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:03:41,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 19:03:41,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2139, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 19:03:41,626 INFO L87 Difference]: Start difference. First operand 778 states and 863 transitions. Second operand 48 states. [2020-12-22 19:03:44,080 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2020-12-22 19:03:48,289 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-12-22 19:03:52,230 WARN L197 SmtUtils]: Spent 3.79 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:03:56,525 WARN L197 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:04:00,733 WARN L197 SmtUtils]: Spent 3.99 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:04:05,033 WARN L197 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:04:09,397 WARN L197 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:04:13,703 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:04:18,022 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:04:22,332 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:04:26,572 WARN L197 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-12-22 19:04:30,814 WARN L197 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-12-22 19:04:30,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:30,822 INFO L93 Difference]: Finished difference Result 1426 states and 1577 transitions. [2020-12-22 19:04:30,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 19:04:30,824 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 113 [2020-12-22 19:04:30,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:30,827 INFO L225 Difference]: With dead ends: 1426 [2020-12-22 19:04:30,828 INFO L226 Difference]: Without dead ends: 792 [2020-12-22 19:04:30,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 49.8s TimeCoverageRelationStatistics Valid=402, Invalid=4854, Unknown=0, NotChecked=0, Total=5256 [2020-12-22 19:04:30,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2020-12-22 19:04:30,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 786. [2020-12-22 19:04:30,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 786 states. [2020-12-22 19:04:30,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 871 transitions. [2020-12-22 19:04:30,843 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 871 transitions. Word has length 113 [2020-12-22 19:04:30,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:30,843 INFO L481 AbstractCegarLoop]: Abstraction has 786 states and 871 transitions. [2020-12-22 19:04:30,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 19:04:30,843 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 871 transitions. [2020-12-22 19:04:30,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-22 19:04:30,845 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:30,845 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:31,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:31,060 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:31,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:31,060 INFO L82 PathProgramCache]: Analyzing trace with hash -774340716, now seen corresponding path program 16 times [2020-12-22 19:04:31,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:31,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072851077] [2020-12-22 19:04:31,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:31,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:31,816 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 98 proven. 295 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:04:31,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072851077] [2020-12-22 19:04:31,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270767961] [2020-12-22 19:04:31,817 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 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 19:04:31,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:04:31,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:31,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 87 conjunts are in the unsatisfiable core [2020-12-22 19:04:31,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:32,742 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 128 proven. 265 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:04:32,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:32,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 34 [2020-12-22 19:04:32,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679104190] [2020-12-22 19:04:32,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 19:04:32,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:32,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 19:04:32,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1011, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 19:04:32,744 INFO L87 Difference]: Start difference. First operand 786 states and 871 transitions. Second operand 35 states. [2020-12-22 19:04:34,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:34,435 INFO L93 Difference]: Finished difference Result 879 states and 973 transitions. [2020-12-22 19:04:34,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 19:04:34,436 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 117 [2020-12-22 19:04:34,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:34,439 INFO L225 Difference]: With dead ends: 879 [2020-12-22 19:04:34,439 INFO L226 Difference]: Without dead ends: 879 [2020-12-22 19:04:34,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=457, Invalid=1705, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 19:04:34,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2020-12-22 19:04:34,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 867. [2020-12-22 19:04:34,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 867 states. [2020-12-22 19:04:34,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 961 transitions. [2020-12-22 19:04:34,454 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 961 transitions. Word has length 117 [2020-12-22 19:04:34,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:34,454 INFO L481 AbstractCegarLoop]: Abstraction has 867 states and 961 transitions. [2020-12-22 19:04:34,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 19:04:34,455 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 961 transitions. [2020-12-22 19:04:34,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 19:04:34,456 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:34,457 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:34,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:34,670 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:34,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:34,671 INFO L82 PathProgramCache]: Analyzing trace with hash -198679586, now seen corresponding path program 17 times [2020-12-22 19:04:34,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:34,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615207937] [2020-12-22 19:04:34,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:35,752 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 50 proven. 409 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:04:35,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615207937] [2020-12-22 19:04:35,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918846747] [2020-12-22 19:04:35,753 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:35,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-22 19:04:35,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:35,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 143 conjunts are in the unsatisfiable core [2020-12-22 19:04:35,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:36,936 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 19:04:36,938 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:36,952 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:36,954 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 19:04:36,954 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:23 [2020-12-22 19:04:37,120 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:37,121 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 63 [2020-12-22 19:04:37,127 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:37,179 INFO L625 ElimStorePlain]: treesize reduction 35, result has 48.5 percent of original size [2020-12-22 19:04:37,180 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 19:04:37,180 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:33 [2020-12-22 19:04:40,780 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:04:40,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:04:40,873 INFO L348 Elim1Store]: treesize reduction 14, result has 78.8 percent of original size [2020-12-22 19:04:40,874 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 41 treesize of output 68 [2020-12-22 19:04:40,876 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:04:40,877 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:40,889 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:40,892 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:04:40,892 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:47, output treesize:3 [2020-12-22 19:04:41,006 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 50 proven. 409 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:04:41,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:41,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 36] total 60 [2020-12-22 19:04:41,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042883083] [2020-12-22 19:04:41,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-22 19:04:41,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:41,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-22 19:04:41,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=3396, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 19:04:41,010 INFO L87 Difference]: Start difference. First operand 867 states and 961 transitions. Second operand 60 states. [2020-12-22 19:04:44,556 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-12-22 19:04:44,866 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-12-22 19:04:45,163 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-12-22 19:04:45,478 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-12-22 19:04:45,780 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-12-22 19:04:46,192 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-12-22 19:04:46,585 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-12-22 19:04:46,922 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-12-22 19:04:47,302 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-12-22 19:04:47,653 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2020-12-22 19:04:47,988 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-12-22 19:04:48,263 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-12-22 19:04:48,677 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-12-22 19:04:49,113 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-12-22 19:04:49,683 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-12-22 19:04:50,235 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-12-22 19:04:50,821 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-12-22 19:04:51,381 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-12-22 19:04:51,916 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-12-22 19:04:52,149 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-12-22 19:04:52,591 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-12-22 19:04:52,990 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2020-12-22 19:04:53,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:53,175 INFO L93 Difference]: Finished difference Result 2058 states and 2278 transitions. [2020-12-22 19:04:53,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 19:04:53,180 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 125 [2020-12-22 19:04:53,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:53,184 INFO L225 Difference]: With dead ends: 2058 [2020-12-22 19:04:53,184 INFO L226 Difference]: Without dead ends: 881 [2020-12-22 19:04:53,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2523 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=800, Invalid=11632, Unknown=0, NotChecked=0, Total=12432 [2020-12-22 19:04:53,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2020-12-22 19:04:53,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 875. [2020-12-22 19:04:53,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 875 states. [2020-12-22 19:04:53,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 969 transitions. [2020-12-22 19:04:53,201 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 969 transitions. Word has length 125 [2020-12-22 19:04:53,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:53,201 INFO L481 AbstractCegarLoop]: Abstraction has 875 states and 969 transitions. [2020-12-22 19:04:53,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-22 19:04:53,201 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 969 transitions. [2020-12-22 19:04:53,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 19:04:53,203 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:53,203 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:53,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-22 19:04:53,419 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:53,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:53,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1310586081, now seen corresponding path program 18 times [2020-12-22 19:04:53,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:53,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181222835] [2020-12-22 19:04:53,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:53,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:54,219 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 128 proven. 368 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:04:54,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181222835] [2020-12-22 19:04:54,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188313293] [2020-12-22 19:04:54,219 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:54,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-22 19:04:54,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:54,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 78 conjunts are in the unsatisfiable core [2020-12-22 19:04:54,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:56,099 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 162 proven. 334 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:04:56,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:56,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2020-12-22 19:04:56,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097326553] [2020-12-22 19:04:56,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 19:04:56,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:56,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 19:04:56,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1925, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 19:04:56,102 INFO L87 Difference]: Start difference. First operand 875 states and 969 transitions. Second operand 48 states.