/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-examples/standard_strcpy_original-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 19:04:20,217 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 19:04:20,220 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 19:04:20,260 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 19:04:20,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 19:04:20,262 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 19:04:20,264 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 19:04:20,267 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 19:04:20,269 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 19:04:20,271 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 19:04:20,272 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 19:04:20,274 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 19:04:20,275 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 19:04:20,276 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 19:04:20,278 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 19:04:20,280 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 19:04:20,281 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 19:04:20,282 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 19:04:20,285 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 19:04:20,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 19:04:20,291 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 19:04:20,293 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 19:04:20,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 19:04:20,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 19:04:20,300 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 19:04:20,317 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 19:04:20,318 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 19:04:20,319 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 19:04:20,322 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 19:04:20,324 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 19:04:20,324 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 19:04:20,326 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 19:04:20,327 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 19:04:20,327 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 19:04:20,328 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 19:04:20,331 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 19:04:20,333 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-22 19:04:20,404 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 19:04:20,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 19:04:20,406 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 19:04:20,408 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 19:04:20,408 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 19:04:20,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 19:04:20,409 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-22 19:04:20,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 19:04:20,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 19:04:20,409 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-22 19:04:20,410 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-22 19:04:20,410 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-22 19:04:20,410 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 19:04:20,410 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-22 19:04:20,410 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 19:04:20,411 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 19:04:20,411 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 19:04:20,412 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 19:04:20,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 19:04:20,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 19:04:20,413 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 19:04:20,413 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 19:04:20,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 19:04:20,414 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 19:04:20,414 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 19:04:20,869 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 19:04:20,900 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 19:04:20,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 19:04:20,905 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 19:04:20,905 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 19:04:20,907 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_strcpy_original-1.i [2020-12-22 19:04:21,035 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8967fc489/f1b691b9ce9547b1b8e465e5041406ff/FLAG8678c012c [2020-12-22 19:04:21,785 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 19:04:21,786 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_original-1.i [2020-12-22 19:04:21,794 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8967fc489/f1b691b9ce9547b1b8e465e5041406ff/FLAG8678c012c [2020-12-22 19:04:21,813 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8967fc489/f1b691b9ce9547b1b8e465e5041406ff [2020-12-22 19:04:21,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 19:04:21,819 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 19:04:21,822 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 19:04:21,822 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 19:04:21,827 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 19:04:21,828 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:04:21" (1/1) ... [2020-12-22 19:04:21,829 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51e71b4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:21, skipping insertion in model container [2020-12-22 19:04:21,829 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:04:21" (1/1) ... [2020-12-22 19:04:21,839 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 19:04:21,858 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 19:04:22,072 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_original-1.i[819,832] [2020-12-22 19:04:22,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:04:22,105 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 19:04:22,121 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_original-1.i[819,832] [2020-12-22 19:04:22,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:04:22,151 INFO L208 MainTranslator]: Completed translation [2020-12-22 19:04:22,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:22 WrapperNode [2020-12-22 19:04:22,152 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 19:04:22,153 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 19:04:22,154 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 19:04:22,154 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 19:04:22,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:22" (1/1) ... [2020-12-22 19:04:22,175 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:22" (1/1) ... [2020-12-22 19:04:22,203 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 19:04:22,203 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 19:04:22,204 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 19:04:22,204 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 19:04:22,220 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:22" (1/1) ... [2020-12-22 19:04:22,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:22" (1/1) ... [2020-12-22 19:04:22,224 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:22" (1/1) ... [2020-12-22 19:04:22,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:22" (1/1) ... [2020-12-22 19:04:22,235 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:22" (1/1) ... [2020-12-22 19:04:22,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:22" (1/1) ... [2020-12-22 19:04:22,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:22" (1/1) ... [2020-12-22 19:04:22,246 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 19:04:22,248 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 19:04:22,248 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 19:04:22,248 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 19:04:22,249 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:22" (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 19:04:22,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 19:04:22,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 19:04:22,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 19:04:22,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 19:04:22,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 19:04:22,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 19:04:22,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 19:04:22,891 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 19:04:22,896 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-22 19:04:22,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:04:22 BoogieIcfgContainer [2020-12-22 19:04:22,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 19:04:22,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 19:04:22,901 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 19:04:22,909 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 19:04:22,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:04:21" (1/3) ... [2020-12-22 19:04:22,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5049e58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:04:22, skipping insertion in model container [2020-12-22 19:04:22,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:22" (2/3) ... [2020-12-22 19:04:22,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5049e58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:04:22, skipping insertion in model container [2020-12-22 19:04:22,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:04:22" (3/3) ... [2020-12-22 19:04:22,916 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_strcpy_original-1.i [2020-12-22 19:04:22,924 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 19:04:22,930 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 16 error locations. [2020-12-22 19:04:22,955 INFO L253 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2020-12-22 19:04:23,004 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 19:04:23,005 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-22 19:04:23,005 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 19:04:23,005 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 19:04:23,005 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 19:04:23,005 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 19:04:23,005 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 19:04:23,006 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 19:04:23,039 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-12-22 19:04:23,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-22 19:04:23,052 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:23,053 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-22 19:04:23,054 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:23,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:23,063 INFO L82 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2020-12-22 19:04:23,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:23,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013602845] [2020-12-22 19:04:23,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:23,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:23,344 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 19:04:23,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013602845] [2020-12-22 19:04:23,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:04:23,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:04:23,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221644805] [2020-12-22 19:04:23,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:04:23,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:23,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:04:23,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:04:23,374 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-12-22 19:04:23,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:23,444 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-12-22 19:04:23,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:04:23,446 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-22 19:04:23,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:23,456 INFO L225 Difference]: With dead ends: 36 [2020-12-22 19:04:23,457 INFO L226 Difference]: Without dead ends: 34 [2020-12-22 19:04:23,458 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 19:04:23,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-22 19:04:23,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-22 19:04:23,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-22 19:04:23,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-12-22 19:04:23,499 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 4 [2020-12-22 19:04:23,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:23,499 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-12-22 19:04:23,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:04:23,499 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-12-22 19:04:23,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-22 19:04:23,500 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:23,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-22 19:04:23,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 19:04:23,501 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:23,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:23,502 INFO L82 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2020-12-22 19:04:23,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:23,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621940547] [2020-12-22 19:04:23,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:23,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:23,588 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 19:04:23,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621940547] [2020-12-22 19:04:23,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:04:23,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:04:23,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999492167] [2020-12-22 19:04:23,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:04:23,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:23,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:04:23,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:04:23,593 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 3 states. [2020-12-22 19:04:23,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:23,654 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-12-22 19:04:23,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:04:23,654 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-22 19:04:23,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:23,656 INFO L225 Difference]: With dead ends: 38 [2020-12-22 19:04:23,656 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 19:04:23,657 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 19:04:23,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 19:04:23,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-12-22 19:04:23,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 19:04:23,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-12-22 19:04:23,664 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 4 [2020-12-22 19:04:23,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:23,665 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-12-22 19:04:23,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:04:23,665 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-12-22 19:04:23,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 19:04:23,665 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:23,666 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:23,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 19:04:23,666 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:23,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:23,668 INFO L82 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2020-12-22 19:04:23,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:23,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044600187] [2020-12-22 19:04:23,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:23,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:23,761 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 19:04:23,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044600187] [2020-12-22 19:04:23,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449343246] [2020-12-22 19:04:23,762 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 19:04:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:23,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 19:04:23,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:23,934 INFO L348 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-12-22 19:04:23,937 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 11 [2020-12-22 19:04:23,941 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:23,951 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:23,961 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:04:23,961 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:17 [2020-12-22 19:04:24,036 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 19:04:24,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:24,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2020-12-22 19:04:24,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422966803] [2020-12-22 19:04:24,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:04:24,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:24,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:04:24,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:04:24,047 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 4 states. [2020-12-22 19:04:24,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:24,200 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-12-22 19:04:24,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:04:24,201 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-22 19:04:24,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:24,206 INFO L225 Difference]: With dead ends: 42 [2020-12-22 19:04:24,206 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 19:04:24,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 2 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 19:04:24,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 19:04:24,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-12-22 19:04:24,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 19:04:24,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-12-22 19:04:24,220 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 8 [2020-12-22 19:04:24,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:24,220 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-12-22 19:04:24,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:04:24,221 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-12-22 19:04:24,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 19:04:24,222 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:24,223 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1] [2020-12-22 19:04:24,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 19:04:24,438 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:24,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:24,440 INFO L82 PathProgramCache]: Analyzing trace with hash 276944844, now seen corresponding path program 2 times [2020-12-22 19:04:24,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:24,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004389535] [2020-12-22 19:04:24,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:24,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:24,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:04:24,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004389535] [2020-12-22 19:04:24,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201438005] [2020-12-22 19:04:24,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:24,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:04:24,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:24,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 19:04:24,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:24,625 INFO L348 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-12-22 19:04:24,626 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 11 [2020-12-22 19:04:24,627 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:24,635 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:24,638 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:04:24,639 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:17 [2020-12-22 19:04:24,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:04:24,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:04:24,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2020-12-22 19:04:24,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145354774] [2020-12-22 19:04:24,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 19:04:24,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:24,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 19:04:24,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:04:24,770 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 6 states. [2020-12-22 19:04:24,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:24,964 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-12-22 19:04:24,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:04:24,965 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-22 19:04:24,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:24,966 INFO L225 Difference]: With dead ends: 81 [2020-12-22 19:04:24,967 INFO L226 Difference]: Without dead ends: 81 [2020-12-22 19:04:24,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:04:24,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-22 19:04:24,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 57. [2020-12-22 19:04:24,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 19:04:24,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 76 transitions. [2020-12-22 19:04:24,975 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 76 transitions. Word has length 12 [2020-12-22 19:04:24,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:24,976 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 76 transitions. [2020-12-22 19:04:24,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 19:04:24,976 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 76 transitions. [2020-12-22 19:04:24,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 19:04:24,977 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:24,977 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 19:04:25,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:25,193 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:25,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:25,195 INFO L82 PathProgramCache]: Analyzing trace with hash -4646106, now seen corresponding path program 1 times [2020-12-22 19:04:25,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:25,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334082335] [2020-12-22 19:04:25,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:25,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:25,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:04:25,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334082335] [2020-12-22 19:04:25,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303999452] [2020-12-22 19:04:25,269 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 19:04:25,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:25,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 19:04:25,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:25,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:04:25,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:25,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2020-12-22 19:04:25,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190452393] [2020-12-22 19:04:25,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 19:04:25,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:25,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 19:04:25,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:04:25,369 INFO L87 Difference]: Start difference. First operand 57 states and 76 transitions. Second operand 8 states. [2020-12-22 19:04:25,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:25,544 INFO L93 Difference]: Finished difference Result 115 states and 120 transitions. [2020-12-22 19:04:25,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 19:04:25,544 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-12-22 19:04:25,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:25,547 INFO L225 Difference]: With dead ends: 115 [2020-12-22 19:04:25,548 INFO L226 Difference]: Without dead ends: 115 [2020-12-22 19:04:25,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 19:04:25,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-22 19:04:25,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 61. [2020-12-22 19:04:25,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-22 19:04:25,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2020-12-22 19:04:25,557 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 13 [2020-12-22 19:04:25,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:25,557 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2020-12-22 19:04:25,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 19:04:25,557 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2020-12-22 19:04:25,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 19:04:25,558 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:25,558 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:25,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:25,772 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:25,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:25,773 INFO L82 PathProgramCache]: Analyzing trace with hash -2110059869, now seen corresponding path program 1 times [2020-12-22 19:04:25,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:25,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009434906] [2020-12-22 19:04:25,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:25,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:25,820 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 19:04:25,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009434906] [2020-12-22 19:04:25,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:04:25,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:04:25,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516504590] [2020-12-22 19:04:25,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:04:25,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:25,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:04:25,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:04:25,824 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand 3 states. [2020-12-22 19:04:25,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:25,845 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2020-12-22 19:04:25,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:04:25,847 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-12-22 19:04:25,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:25,848 INFO L225 Difference]: With dead ends: 59 [2020-12-22 19:04:25,849 INFO L226 Difference]: Without dead ends: 59 [2020-12-22 19:04:25,849 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 19:04:25,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-22 19:04:25,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-12-22 19:04:25,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 19:04:25,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2020-12-22 19:04:25,861 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 20 [2020-12-22 19:04:25,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:25,862 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2020-12-22 19:04:25,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:04:25,862 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2020-12-22 19:04:25,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 19:04:25,863 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:25,863 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:25,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 19:04:25,863 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:25,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:25,864 INFO L82 PathProgramCache]: Analyzing trace with hash -2110059868, now seen corresponding path program 1 times [2020-12-22 19:04:25,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:25,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708028846] [2020-12-22 19:04:25,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:25,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:25,993 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:04:25,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708028846] [2020-12-22 19:04:25,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122676168] [2020-12-22 19:04:25,994 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 19:04:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:26,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 19:04:26,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:04:26,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:26,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 19:04:26,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112396412] [2020-12-22 19:04:26,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 19:04:26,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:26,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 19:04:26,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:04:26,094 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand 7 states. [2020-12-22 19:04:26,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:26,310 INFO L93 Difference]: Finished difference Result 133 states and 139 transitions. [2020-12-22 19:04:26,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:04:26,311 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-12-22 19:04:26,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:26,312 INFO L225 Difference]: With dead ends: 133 [2020-12-22 19:04:26,313 INFO L226 Difference]: Without dead ends: 133 [2020-12-22 19:04:26,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:04:26,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-22 19:04:26,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 63. [2020-12-22 19:04:26,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 19:04:26,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2020-12-22 19:04:26,319 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 20 [2020-12-22 19:04:26,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:26,320 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2020-12-22 19:04:26,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 19:04:26,320 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2020-12-22 19:04:26,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 19:04:26,324 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:26,324 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:26,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:26,525 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:26,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:26,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1143766311, now seen corresponding path program 2 times [2020-12-22 19:04:26,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:26,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952625504] [2020-12-22 19:04:26,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:26,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:26,649 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:04:26,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952625504] [2020-12-22 19:04:26,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245749018] [2020-12-22 19:04:26,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:26,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 19:04:26,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:26,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 19:04:26,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:26,727 INFO L348 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-12-22 19:04:26,727 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 11 [2020-12-22 19:04:26,729 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:26,736 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:26,738 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:04:26,738 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:14 [2020-12-22 19:04:26,804 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 19:04:26,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:04:26,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2020-12-22 19:04:26,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191235311] [2020-12-22 19:04:26,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:04:26,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:26,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:04:26,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:04:26,806 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand 4 states. [2020-12-22 19:04:26,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:26,883 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2020-12-22 19:04:26,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:04:26,884 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-12-22 19:04:26,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:26,885 INFO L225 Difference]: With dead ends: 67 [2020-12-22 19:04:26,885 INFO L226 Difference]: Without dead ends: 67 [2020-12-22 19:04:26,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:04:26,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-22 19:04:26,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2020-12-22 19:04:26,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 19:04:26,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2020-12-22 19:04:26,891 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 24 [2020-12-22 19:04:26,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:26,891 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2020-12-22 19:04:26,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:04:26,891 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2020-12-22 19:04:26,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 19:04:26,892 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:26,893 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:27,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:27,106 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:27,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:27,107 INFO L82 PathProgramCache]: Analyzing trace with hash -352203591, now seen corresponding path program 1 times [2020-12-22 19:04:27,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:27,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438713831] [2020-12-22 19:04:27,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:27,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:27,181 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:04:27,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438713831] [2020-12-22 19:04:27,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203306909] [2020-12-22 19:04:27,182 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 19:04:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:27,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 19:04:27,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:27,311 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:04:27,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:27,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 19:04:27,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222754855] [2020-12-22 19:04:27,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 19:04:27,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:27,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 19:04:27,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:04:27,314 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 8 states. [2020-12-22 19:04:27,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:27,507 INFO L93 Difference]: Finished difference Result 157 states and 164 transitions. [2020-12-22 19:04:27,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 19:04:27,508 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-12-22 19:04:27,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:27,509 INFO L225 Difference]: With dead ends: 157 [2020-12-22 19:04:27,509 INFO L226 Difference]: Without dead ends: 157 [2020-12-22 19:04:27,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:04:27,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-22 19:04:27,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 67. [2020-12-22 19:04:27,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-22 19:04:27,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2020-12-22 19:04:27,517 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 26 [2020-12-22 19:04:27,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:27,517 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2020-12-22 19:04:27,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 19:04:27,518 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2020-12-22 19:04:27,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 19:04:27,519 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:27,519 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:27,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:27,735 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:27,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:27,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1281757436, now seen corresponding path program 2 times [2020-12-22 19:04:27,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:27,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577942539] [2020-12-22 19:04:27,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:27,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:27,838 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:04:27,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577942539] [2020-12-22 19:04:27,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189786236] [2020-12-22 19:04:27,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:27,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:04:27,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:27,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 19:04:27,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:27,983 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:04:27,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:27,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 19:04:27,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725650557] [2020-12-22 19:04:27,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 19:04:27,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:27,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 19:04:27,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:04:27,986 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand 9 states. [2020-12-22 19:04:28,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:28,195 INFO L93 Difference]: Finished difference Result 183 states and 191 transitions. [2020-12-22 19:04:28,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 19:04:28,196 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-12-22 19:04:28,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:28,197 INFO L225 Difference]: With dead ends: 183 [2020-12-22 19:04:28,198 INFO L226 Difference]: Without dead ends: 183 [2020-12-22 19:04:28,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:04:28,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-12-22 19:04:28,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 71. [2020-12-22 19:04:28,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-22 19:04:28,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2020-12-22 19:04:28,205 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 30 [2020-12-22 19:04:28,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:28,205 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2020-12-22 19:04:28,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 19:04:28,205 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2020-12-22 19:04:28,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 19:04:28,206 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:28,206 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:28,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 19:04:28,422 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:28,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:28,423 INFO L82 PathProgramCache]: Analyzing trace with hash 498629567, now seen corresponding path program 3 times [2020-12-22 19:04:28,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:28,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089648637] [2020-12-22 19:04:28,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:28,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:28,522 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:04:28,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089648637] [2020-12-22 19:04:28,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517549024] [2020-12-22 19:04:28,523 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 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 19:04:28,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 19:04:28,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:28,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 19:04:28,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:28,773 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-22 19:04:28,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:28,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2020-12-22 19:04:28,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316174192] [2020-12-22 19:04:28,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 19:04:28,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:28,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 19:04:28,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-12-22 19:04:28,776 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand 15 states. [2020-12-22 19:04:29,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:29,374 INFO L93 Difference]: Finished difference Result 201 states and 221 transitions. [2020-12-22 19:04:29,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 19:04:29,375 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-12-22 19:04:29,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:29,376 INFO L225 Difference]: With dead ends: 201 [2020-12-22 19:04:29,376 INFO L226 Difference]: Without dead ends: 201 [2020-12-22 19:04:29,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=321, Unknown=0, NotChecked=0, Total=506 [2020-12-22 19:04:29,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-12-22 19:04:29,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 68. [2020-12-22 19:04:29,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-22 19:04:29,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2020-12-22 19:04:29,382 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 34 [2020-12-22 19:04:29,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:29,382 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2020-12-22 19:04:29,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 19:04:29,383 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2020-12-22 19:04:29,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 19:04:29,384 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:29,384 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:29,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-22 19:04:29,597 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:29,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:29,599 INFO L82 PathProgramCache]: Analyzing trace with hash -153043895, now seen corresponding path program 1 times [2020-12-22 19:04:29,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:29,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428925876] [2020-12-22 19:04:29,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:29,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:29,714 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:04:29,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428925876] [2020-12-22 19:04:29,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126576876] [2020-12-22 19:04:29,715 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 19:04:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:29,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 19:04:29,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:29,868 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:04:29,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:29,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 19:04:29,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334460814] [2020-12-22 19:04:29,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 19:04:29,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:29,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 19:04:29,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 19:04:29,871 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand 11 states. [2020-12-22 19:04:30,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:30,122 INFO L93 Difference]: Finished difference Result 231 states and 241 transitions. [2020-12-22 19:04:30,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 19:04:30,123 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-12-22 19:04:30,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:30,125 INFO L225 Difference]: With dead ends: 231 [2020-12-22 19:04:30,125 INFO L226 Difference]: Without dead ends: 231 [2020-12-22 19:04:30,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 19:04:30,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-12-22 19:04:30,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 72. [2020-12-22 19:04:30,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 19:04:30,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2020-12-22 19:04:30,131 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 39 [2020-12-22 19:04:30,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:30,131 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2020-12-22 19:04:30,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 19:04:30,131 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-12-22 19:04:30,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 19:04:30,132 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:30,132 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:30,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:30,347 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:30,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:30,348 INFO L82 PathProgramCache]: Analyzing trace with hash -23675674, now seen corresponding path program 2 times [2020-12-22 19:04:30,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:30,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022396622] [2020-12-22 19:04:30,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:30,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:30,516 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:04:30,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022396622] [2020-12-22 19:04:30,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336430231] [2020-12-22 19:04:30,517 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 19:04:30,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 19:04:30,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:30,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 19:04:30,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:30,741 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-22 19:04:30,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:04:30,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 13 [2020-12-22 19:04:30,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456682375] [2020-12-22 19:04:30,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:04:30,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:30,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:04:30,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-12-22 19:04:30,744 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 4 states. [2020-12-22 19:04:30,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:30,805 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2020-12-22 19:04:30,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:04:30,806 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-12-22 19:04:30,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:30,807 INFO L225 Difference]: With dead ends: 71 [2020-12-22 19:04:30,807 INFO L226 Difference]: Without dead ends: 69 [2020-12-22 19:04:30,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-12-22 19:04:30,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-22 19:04:30,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-12-22 19:04:30,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-22 19:04:30,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2020-12-22 19:04:30,811 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 43 [2020-12-22 19:04:30,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:30,811 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2020-12-22 19:04:30,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:04:30,811 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2020-12-22 19:04:30,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 19:04:30,813 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:30,813 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:31,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:31,027 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:31,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:31,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1564990626, now seen corresponding path program 1 times [2020-12-22 19:04:31,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:31,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405948556] [2020-12-22 19:04:31,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:31,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 19:04:31,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405948556] [2020-12-22 19:04:31,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801417701] [2020-12-22 19:04:31,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:31,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:31,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 19:04:31,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:31,346 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 19:04:31,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:31,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 19:04:31,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510718278] [2020-12-22 19:04:31,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 19:04:31,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:31,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 19:04:31,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 19:04:31,348 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 12 states. [2020-12-22 19:04:31,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:31,640 INFO L93 Difference]: Finished difference Result 227 states and 238 transitions. [2020-12-22 19:04:31,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 19:04:31,640 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-12-22 19:04:31,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:31,642 INFO L225 Difference]: With dead ends: 227 [2020-12-22 19:04:31,643 INFO L226 Difference]: Without dead ends: 227 [2020-12-22 19:04:31,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 19:04:31,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-12-22 19:04:31,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 73. [2020-12-22 19:04:31,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 19:04:31,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-12-22 19:04:31,648 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 45 [2020-12-22 19:04:31,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:31,648 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-12-22 19:04:31,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 19:04:31,648 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-12-22 19:04:31,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 19:04:31,649 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:31,650 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:31,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 19:04:31,866 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:31,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:31,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1246743681, now seen corresponding path program 2 times [2020-12-22 19:04:31,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:31,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444376067] [2020-12-22 19:04:31,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:32,011 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 19:04:32,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444376067] [2020-12-22 19:04:32,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605006427] [2020-12-22 19:04:32,012 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 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 19:04:32,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 19:04:32,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:32,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 19:04:32,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:32,093 INFO L348 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-12-22 19:04:32,094 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 11 [2020-12-22 19:04:32,095 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:32,103 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:32,104 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:04:32,104 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:17 [2020-12-22 19:04:32,252 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2020-12-22 19:04:32,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:32,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 3] total 14 [2020-12-22 19:04:32,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809408177] [2020-12-22 19:04:32,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 19:04:32,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:32,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 19:04:32,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-12-22 19:04:32,255 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 14 states. [2020-12-22 19:04:33,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:33,180 INFO L93 Difference]: Finished difference Result 218 states and 230 transitions. [2020-12-22 19:04:33,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 19:04:33,181 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-12-22 19:04:33,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:33,182 INFO L225 Difference]: With dead ends: 218 [2020-12-22 19:04:33,182 INFO L226 Difference]: Without dead ends: 218 [2020-12-22 19:04:33,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2020-12-22 19:04:33,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-12-22 19:04:33,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 187. [2020-12-22 19:04:33,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-22 19:04:33,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 209 transitions. [2020-12-22 19:04:33,189 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 209 transitions. Word has length 49 [2020-12-22 19:04:33,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:33,189 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 209 transitions. [2020-12-22 19:04:33,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 19:04:33,189 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 209 transitions. [2020-12-22 19:04:33,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 19:04:33,190 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:33,190 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:33,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 19:04:33,406 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:33,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:33,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1930527712, now seen corresponding path program 1 times [2020-12-22 19:04:33,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:33,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238820500] [2020-12-22 19:04:33,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:33,577 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:04:33,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238820500] [2020-12-22 19:04:33,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535288094] [2020-12-22 19:04:33,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:33,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:33,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 19:04:33,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:33,760 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:04:33,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:33,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 19:04:33,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785281844] [2020-12-22 19:04:33,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 19:04:33,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:33,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 19:04:33,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 19:04:33,763 INFO L87 Difference]: Start difference. First operand 187 states and 209 transitions. Second operand 15 states. [2020-12-22 19:04:34,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:34,091 INFO L93 Difference]: Finished difference Result 254 states and 268 transitions. [2020-12-22 19:04:34,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 19:04:34,092 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2020-12-22 19:04:34,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:34,094 INFO L225 Difference]: With dead ends: 254 [2020-12-22 19:04:34,095 INFO L226 Difference]: Without dead ends: 254 [2020-12-22 19:04:34,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 19:04:34,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-12-22 19:04:34,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 191. [2020-12-22 19:04:34,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-12-22 19:04:34,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 213 transitions. [2020-12-22 19:04:34,102 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 213 transitions. Word has length 58 [2020-12-22 19:04:34,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:34,102 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 213 transitions. [2020-12-22 19:04:34,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 19:04:34,102 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 213 transitions. [2020-12-22 19:04:34,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 19:04:34,103 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:34,103 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:34,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 19:04:34,317 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:34,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:34,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1682377629, now seen corresponding path program 2 times [2020-12-22 19:04:34,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:34,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399043369] [2020-12-22 19:04:34,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:34,568 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:04:34,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399043369] [2020-12-22 19:04:34,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205579736] [2020-12-22 19:04:34,569 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 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 19:04:34,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 19:04:34,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:34,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 19:04:34,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:34,762 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 19:04:34,763 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:34,765 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:34,766 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:04:34,766 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2020-12-22 19:04:34,799 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-12-22 19:04:34,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:04:34,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [15] total 21 [2020-12-22 19:04:34,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727332647] [2020-12-22 19:04:34,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 19:04:34,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:34,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 19:04:34,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2020-12-22 19:04:34,802 INFO L87 Difference]: Start difference. First operand 191 states and 213 transitions. Second operand 8 states. [2020-12-22 19:04:34,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:34,918 INFO L93 Difference]: Finished difference Result 196 states and 216 transitions. [2020-12-22 19:04:34,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 19:04:34,918 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-12-22 19:04:34,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:34,920 INFO L225 Difference]: With dead ends: 196 [2020-12-22 19:04:34,921 INFO L226 Difference]: Without dead ends: 193 [2020-12-22 19:04:34,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=319, Unknown=0, NotChecked=0, Total=506 [2020-12-22 19:04:34,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-12-22 19:04:34,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 191. [2020-12-22 19:04:34,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-12-22 19:04:34,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 212 transitions. [2020-12-22 19:04:34,927 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 212 transitions. Word has length 62 [2020-12-22 19:04:34,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:34,927 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 212 transitions. [2020-12-22 19:04:34,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 19:04:34,928 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 212 transitions. [2020-12-22 19:04:34,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 19:04:34,928 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:34,929 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:35,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:35,144 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:35,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:35,145 INFO L82 PathProgramCache]: Analyzing trace with hash 465497338, now seen corresponding path program 1 times [2020-12-22 19:04:35,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:35,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25941443] [2020-12-22 19:04:35,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:35,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:35,304 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:04:35,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25941443] [2020-12-22 19:04:35,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314712443] [2020-12-22 19:04:35,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:04:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:35,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 19:04:35,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:35,476 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:04:35,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:35,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 19:04:35,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937956297] [2020-12-22 19:04:35,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 19:04:35,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:35,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 19:04:35,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 19:04:35,479 INFO L87 Difference]: Start difference. First operand 191 states and 212 transitions. Second operand 16 states. [2020-12-22 19:04:35,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:35,798 INFO L93 Difference]: Finished difference Result 274 states and 288 transitions. [2020-12-22 19:04:35,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 19:04:35,799 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-12-22 19:04:35,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:35,801 INFO L225 Difference]: With dead ends: 274 [2020-12-22 19:04:35,801 INFO L226 Difference]: Without dead ends: 274 [2020-12-22 19:04:35,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 19:04:35,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-12-22 19:04:35,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 195. [2020-12-22 19:04:35,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-22 19:04:35,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 216 transitions. [2020-12-22 19:04:35,807 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 216 transitions. Word has length 67 [2020-12-22 19:04:35,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:35,808 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 216 transitions. [2020-12-22 19:04:35,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 19:04:35,808 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 216 transitions. [2020-12-22 19:04:35,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 19:04:35,808 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:35,809 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:36,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 19:04:36,024 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:36,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:36,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1819545623, now seen corresponding path program 2 times [2020-12-22 19:04:36,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:36,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706923699] [2020-12-22 19:04:36,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:36,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:36,210 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:04:36,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706923699] [2020-12-22 19:04:36,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865866113] [2020-12-22 19:04:36,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:36,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:04:36,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:36,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 19:04:36,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:36,431 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:04:36,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:36,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 19:04:36,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129749952] [2020-12-22 19:04:36,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 19:04:36,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:36,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 19:04:36,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 19:04:36,435 INFO L87 Difference]: Start difference. First operand 195 states and 216 transitions. Second operand 17 states. [2020-12-22 19:04:36,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:36,870 INFO L93 Difference]: Finished difference Result 295 states and 310 transitions. [2020-12-22 19:04:36,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 19:04:36,870 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-12-22 19:04:36,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:36,872 INFO L225 Difference]: With dead ends: 295 [2020-12-22 19:04:36,872 INFO L226 Difference]: Without dead ends: 295 [2020-12-22 19:04:36,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 19:04:36,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-12-22 19:04:36,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 199. [2020-12-22 19:04:36,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-22 19:04:36,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 220 transitions. [2020-12-22 19:04:36,879 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 220 transitions. Word has length 71 [2020-12-22 19:04:36,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:36,880 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 220 transitions. [2020-12-22 19:04:36,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 19:04:36,880 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 220 transitions. [2020-12-22 19:04:36,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 19:04:36,881 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:36,881 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:37,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:37,095 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:37,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:37,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1232624820, now seen corresponding path program 3 times [2020-12-22 19:04:37,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:37,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802484434] [2020-12-22 19:04:37,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:37,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:37,334 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:04:37,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802484434] [2020-12-22 19:04:37,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678658432] [2020-12-22 19:04:37,335 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 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 19:04:37,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 19:04:37,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:37,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 19:04:37,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:37,525 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-22 19:04:37,525 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 15 treesize of output 15 [2020-12-22 19:04:37,526 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:37,533 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:37,533 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:04:37,534 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-12-22 19:04:37,628 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:37,629 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 26 treesize of output 18 [2020-12-22 19:04:37,631 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:37,633 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:37,633 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 19:04:37,634 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:3 [2020-12-22 19:04:37,684 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-12-22 19:04:37,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:37,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 25 [2020-12-22 19:04:37,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222081893] [2020-12-22 19:04:37,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 19:04:37,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:37,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 19:04:37,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=381, Unknown=0, NotChecked=0, Total=600 [2020-12-22 19:04:37,686 INFO L87 Difference]: Start difference. First operand 199 states and 220 transitions. Second operand 25 states. [2020-12-22 19:04:39,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:39,015 INFO L93 Difference]: Finished difference Result 463 states and 479 transitions. [2020-12-22 19:04:39,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 19:04:39,016 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 75 [2020-12-22 19:04:39,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:39,019 INFO L225 Difference]: With dead ends: 463 [2020-12-22 19:04:39,019 INFO L226 Difference]: Without dead ends: 463 [2020-12-22 19:04:39,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1124, Invalid=2182, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 19:04:39,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2020-12-22 19:04:39,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 210. [2020-12-22 19:04:39,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-12-22 19:04:39,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 231 transitions. [2020-12-22 19:04:39,029 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 231 transitions. Word has length 75 [2020-12-22 19:04:39,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:39,029 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 231 transitions. [2020-12-22 19:04:39,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 19:04:39,029 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 231 transitions. [2020-12-22 19:04:39,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 19:04:39,030 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:39,030 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:39,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:39,244 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:39,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:39,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1437901644, now seen corresponding path program 4 times [2020-12-22 19:04:39,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:39,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439972088] [2020-12-22 19:04:39,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:39,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:39,500 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 19:04:39,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439972088] [2020-12-22 19:04:39,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291426631] [2020-12-22 19:04:39,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:40,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:04:40,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:40,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 19:04:40,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:40,223 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 19:04:40,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:40,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 19:04:40,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734790393] [2020-12-22 19:04:40,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 19:04:40,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:40,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 19:04:40,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 19:04:40,225 INFO L87 Difference]: Start difference. First operand 210 states and 231 transitions. Second operand 19 states. [2020-12-22 19:04:40,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:40,683 INFO L93 Difference]: Finished difference Result 343 states and 360 transitions. [2020-12-22 19:04:40,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 19:04:40,684 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 84 [2020-12-22 19:04:40,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:40,686 INFO L225 Difference]: With dead ends: 343 [2020-12-22 19:04:40,686 INFO L226 Difference]: Without dead ends: 343 [2020-12-22 19:04:40,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 19:04:40,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-12-22 19:04:40,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 214. [2020-12-22 19:04:40,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-12-22 19:04:40,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 235 transitions. [2020-12-22 19:04:40,694 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 235 transitions. Word has length 84 [2020-12-22 19:04:40,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:40,694 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 235 transitions. [2020-12-22 19:04:40,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 19:04:40,694 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 235 transitions. [2020-12-22 19:04:40,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 19:04:40,695 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:40,695 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:40,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 19:04:40,909 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:40,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:40,910 INFO L82 PathProgramCache]: Analyzing trace with hash 470842831, now seen corresponding path program 5 times [2020-12-22 19:04:40,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:40,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399388070] [2020-12-22 19:04:40,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 19:04:41,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399388070] [2020-12-22 19:04:41,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292382879] [2020-12-22 19:04:41,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:41,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-12-22 19:04:41,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:41,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 19:04:41,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:41,518 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 19:04:41,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:41,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 19:04:41,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860336980] [2020-12-22 19:04:41,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 19:04:41,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:41,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 19:04:41,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 19:04:41,521 INFO L87 Difference]: Start difference. First operand 214 states and 235 transitions. Second operand 20 states. [2020-12-22 19:04:42,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:42,046 INFO L93 Difference]: Finished difference Result 364 states and 382 transitions. [2020-12-22 19:04:42,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 19:04:42,048 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 88 [2020-12-22 19:04:42,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:42,050 INFO L225 Difference]: With dead ends: 364 [2020-12-22 19:04:42,050 INFO L226 Difference]: Without dead ends: 364 [2020-12-22 19:04:42,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 19:04:42,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-12-22 19:04:42,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 218. [2020-12-22 19:04:42,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-12-22 19:04:42,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 239 transitions. [2020-12-22 19:04:42,059 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 239 transitions. Word has length 88 [2020-12-22 19:04:42,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:42,060 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 239 transitions. [2020-12-22 19:04:42,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 19:04:42,060 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 239 transitions. [2020-12-22 19:04:42,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 19:04:42,061 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:42,061 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:42,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:42,275 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:42,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:42,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1143299794, now seen corresponding path program 6 times [2020-12-22 19:04:42,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:42,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165901390] [2020-12-22 19:04:42,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:42,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:42,631 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 19:04:42,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165901390] [2020-12-22 19:04:42,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028713657] [2020-12-22 19:04:42,632 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 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 19:04:42,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-22 19:04:42,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:42,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 19:04:42,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:42,764 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 19:04:42,767 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:42,776 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:42,778 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:04:42,778 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-22 19:04:42,950 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2020-12-22 19:04:42,951 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:42,962 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:42,963 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:04:42,963 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2020-12-22 19:04:43,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:04:43,041 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2020-12-22 19:04:43,042 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:43,054 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:43,056 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 19:04:43,056 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:22 [2020-12-22 19:04:43,150 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 26 treesize of output 10 [2020-12-22 19:04:43,152 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:43,157 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:43,159 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 19:04:43,159 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2020-12-22 19:04:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2020-12-22 19:04:43,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:43,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 29 [2020-12-22 19:04:43,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857454265] [2020-12-22 19:04:43,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 19:04:43,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:43,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 19:04:43,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=523, Unknown=0, NotChecked=0, Total=812 [2020-12-22 19:04:43,251 INFO L87 Difference]: Start difference. First operand 218 states and 239 transitions. Second operand 29 states. [2020-12-22 19:04:45,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:45,274 INFO L93 Difference]: Finished difference Result 383 states and 402 transitions. [2020-12-22 19:04:45,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 19:04:45,274 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 92 [2020-12-22 19:04:45,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:45,276 INFO L225 Difference]: With dead ends: 383 [2020-12-22 19:04:45,277 INFO L226 Difference]: Without dead ends: 383 [2020-12-22 19:04:45,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1438, Invalid=3118, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 19:04:45,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-12-22 19:04:45,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 215. [2020-12-22 19:04:45,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-12-22 19:04:45,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 235 transitions. [2020-12-22 19:04:45,285 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 235 transitions. Word has length 92 [2020-12-22 19:04:45,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:45,286 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 235 transitions. [2020-12-22 19:04:45,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 19:04:45,286 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 235 transitions. [2020-12-22 19:04:45,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 19:04:45,287 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:45,287 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:45,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 19:04:45,501 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:45,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:45,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1283478130, now seen corresponding path program 1 times [2020-12-22 19:04:45,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:45,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122072287] [2020-12-22 19:04:45,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:45,823 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 19:04:45,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122072287] [2020-12-22 19:04:45,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127982926] [2020-12-22 19:04:45,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:04:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:45,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 19:04:45,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:46,040 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 19:04:46,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:46,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 19:04:46,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340536523] [2020-12-22 19:04:46,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 19:04:46,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:46,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 19:04:46,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 19:04:46,045 INFO L87 Difference]: Start difference. First operand 215 states and 235 transitions. Second operand 22 states. [2020-12-22 19:04:46,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:46,543 INFO L93 Difference]: Finished difference Result 398 states and 418 transitions. [2020-12-22 19:04:46,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 19:04:46,544 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 98 [2020-12-22 19:04:46,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:46,546 INFO L225 Difference]: With dead ends: 398 [2020-12-22 19:04:46,546 INFO L226 Difference]: Without dead ends: 398 [2020-12-22 19:04:46,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 19:04:46,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-12-22 19:04:46,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 219. [2020-12-22 19:04:46,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-12-22 19:04:46,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 239 transitions. [2020-12-22 19:04:46,552 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 239 transitions. Word has length 98 [2020-12-22 19:04:46,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:46,552 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 239 transitions. [2020-12-22 19:04:46,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 19:04:46,552 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 239 transitions. [2020-12-22 19:04:46,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-22 19:04:46,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:46,553 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:46,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 19:04:46,767 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:46,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:46,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1839372591, now seen corresponding path program 2 times [2020-12-22 19:04:46,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:46,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246629662] [2020-12-22 19:04:46,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:47,112 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 19:04:47,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246629662] [2020-12-22 19:04:47,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945771200] [2020-12-22 19:04:47,112 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 19:04:47,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:04:47,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:47,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 19:04:47,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:47,348 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 19:04:47,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:47,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 19:04:47,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862898876] [2020-12-22 19:04:47,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 19:04:47,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:47,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 19:04:47,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 19:04:47,350 INFO L87 Difference]: Start difference. First operand 219 states and 239 transitions. Second operand 23 states. [2020-12-22 19:04:47,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:47,858 INFO L93 Difference]: Finished difference Result 419 states and 440 transitions. [2020-12-22 19:04:47,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 19:04:47,859 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 102 [2020-12-22 19:04:47,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:47,862 INFO L225 Difference]: With dead ends: 419 [2020-12-22 19:04:47,862 INFO L226 Difference]: Without dead ends: 419 [2020-12-22 19:04:47,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 19:04:47,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2020-12-22 19:04:47,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 223. [2020-12-22 19:04:47,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-12-22 19:04:47,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 243 transitions. [2020-12-22 19:04:47,869 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 243 transitions. Word has length 102 [2020-12-22 19:04:47,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:47,869 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 243 transitions. [2020-12-22 19:04:47,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 19:04:47,869 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 243 transitions. [2020-12-22 19:04:47,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 19:04:47,870 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:47,870 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:48,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:48,071 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:48,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:48,072 INFO L82 PathProgramCache]: Analyzing trace with hash -312031596, now seen corresponding path program 3 times [2020-12-22 19:04:48,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:48,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563029896] [2020-12-22 19:04:48,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:48,414 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 19:04:48,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563029896] [2020-12-22 19:04:48,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602988302] [2020-12-22 19:04:48,415 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 19:04:48,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 19:04:48,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:48,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 19:04:48,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:48,630 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 19 treesize of output 7 [2020-12-22 19:04:48,631 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:48,633 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:48,634 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 19:04:48,634 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-12-22 19:04:48,662 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-12-22 19:04:48,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:48,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 9] total 29 [2020-12-22 19:04:48,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531542187] [2020-12-22 19:04:48,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 19:04:48,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:48,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 19:04:48,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=483, Unknown=0, NotChecked=0, Total=812 [2020-12-22 19:04:48,665 INFO L87 Difference]: Start difference. First operand 223 states and 243 transitions. Second operand 29 states. [2020-12-22 19:04:49,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:49,343 INFO L93 Difference]: Finished difference Result 449 states and 470 transitions. [2020-12-22 19:04:49,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 19:04:49,343 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 106 [2020-12-22 19:04:49,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:49,346 INFO L225 Difference]: With dead ends: 449 [2020-12-22 19:04:49,346 INFO L226 Difference]: Without dead ends: 439 [2020-12-22 19:04:49,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=551, Unknown=0, NotChecked=0, Total=930 [2020-12-22 19:04:49,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2020-12-22 19:04:49,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 227. [2020-12-22 19:04:49,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-12-22 19:04:49,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 246 transitions. [2020-12-22 19:04:49,354 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 246 transitions. Word has length 106 [2020-12-22 19:04:49,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:49,354 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 246 transitions. [2020-12-22 19:04:49,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 19:04:49,354 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 246 transitions. [2020-12-22 19:04:49,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 19:04:49,355 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:49,355 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:49,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 19:04:49,570 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:49,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:49,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1189609704, now seen corresponding path program 4 times [2020-12-22 19:04:49,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:49,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810506479] [2020-12-22 19:04:49,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:49,946 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 19:04:49,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810506479] [2020-12-22 19:04:49,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972807318] [2020-12-22 19:04:49,947 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 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 19:04:50,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:04:50,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:50,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 19:04:50,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:50,138 INFO L348 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2020-12-22 19:04:50,139 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 19 treesize of output 19 [2020-12-22 19:04:50,140 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:50,143 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:50,143 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:04:50,143 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-12-22 19:04:50,278 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:50,278 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 34 treesize of output 26 [2020-12-22 19:04:50,279 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:50,281 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:50,282 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 19:04:50,282 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:34, output treesize:3 [2020-12-22 19:04:50,337 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2020-12-22 19:04:50,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:50,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 12] total 33 [2020-12-22 19:04:50,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333525402] [2020-12-22 19:04:50,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 19:04:50,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:50,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 19:04:50,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=627, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 19:04:50,339 INFO L87 Difference]: Start difference. First operand 227 states and 246 transitions. Second operand 33 states. [2020-12-22 19:04:51,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:51,908 INFO L93 Difference]: Finished difference Result 675 states and 697 transitions. [2020-12-22 19:04:51,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 19:04:51,909 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 115 [2020-12-22 19:04:51,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:51,912 INFO L225 Difference]: With dead ends: 675 [2020-12-22 19:04:51,913 INFO L226 Difference]: Without dead ends: 675 [2020-12-22 19:04:51,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1239, Invalid=2183, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 19:04:51,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2020-12-22 19:04:51,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 245. [2020-12-22 19:04:51,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-12-22 19:04:51,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 264 transitions. [2020-12-22 19:04:51,923 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 264 transitions. Word has length 115 [2020-12-22 19:04:51,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:51,923 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 264 transitions. [2020-12-22 19:04:51,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 19:04:51,924 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 264 transitions. [2020-12-22 19:04:51,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 19:04:51,924 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:51,924 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:52,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:52,138 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:52,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:52,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1635851654, now seen corresponding path program 5 times [2020-12-22 19:04:52,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:52,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447858527] [2020-12-22 19:04:52,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:52,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:52,559 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-22 19:04:52,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447858527] [2020-12-22 19:04:52,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992194522] [2020-12-22 19:04:52,560 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 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 19:04:53,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2020-12-22 19:04:53,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:53,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 19:04:53,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:54,055 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-22 19:04:54,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:54,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-22 19:04:54,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375032029] [2020-12-22 19:04:54,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 19:04:54,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:54,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 19:04:54,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 19:04:54,057 INFO L87 Difference]: Start difference. First operand 245 states and 264 transitions. Second operand 26 states. [2020-12-22 19:04:54,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:54,711 INFO L93 Difference]: Finished difference Result 494 states and 517 transitions. [2020-12-22 19:04:54,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 19:04:54,712 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 124 [2020-12-22 19:04:54,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:54,714 INFO L225 Difference]: With dead ends: 494 [2020-12-22 19:04:54,715 INFO L226 Difference]: Without dead ends: 494 [2020-12-22 19:04:54,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 19:04:54,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2020-12-22 19:04:54,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 249. [2020-12-22 19:04:54,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-12-22 19:04:54,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 268 transitions. [2020-12-22 19:04:54,723 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 268 transitions. Word has length 124 [2020-12-22 19:04:54,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:54,724 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 268 transitions. [2020-12-22 19:04:54,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 19:04:54,724 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 268 transitions. [2020-12-22 19:04:54,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-22 19:04:54,725 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:54,725 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:54,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 19:04:54,939 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:54,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:54,940 INFO L82 PathProgramCache]: Analyzing trace with hash 141475325, now seen corresponding path program 6 times [2020-12-22 19:04:54,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:54,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859621462] [2020-12-22 19:04:54,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:55,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-22 19:04:55,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859621462] [2020-12-22 19:04:55,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533358962] [2020-12-22 19:04:55,379 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 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 19:04:55,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 19:04:55,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:55,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-22 19:04:55,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:55,533 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_25|], 1=[|v_#valid_31|]} [2020-12-22 19:04:55,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:04:55,537 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 19:04:55,539 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:55,548 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:55,552 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 19:04:55,554 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:55,563 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:55,563 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:04:55,564 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:21 [2020-12-22 19:04:55,725 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 21 treesize of output 15 [2020-12-22 19:04:55,727 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:55,735 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:55,736 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:04:55,736 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:18 [2020-12-22 19:04:55,910 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2020-12-22 19:04:55,911 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:55,921 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:55,922 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:04:55,922 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2020-12-22 19:04:56,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:04:56,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:04:56,022 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 50 [2020-12-22 19:04:56,024 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:56,040 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:56,041 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:04:56,042 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:61 [2020-12-22 19:04:56,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:04:56,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:04:56,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:04:56,825 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:56,826 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 5 case distinctions, treesize of input 70 treesize of output 78 [2020-12-22 19:04:56,830 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-12-22 19:04:56,831 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:04:56,832 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-12-22 19:04:56,832 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:04:56,834 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:56,858 INFO L625 ElimStorePlain]: treesize reduction 17, result has 60.5 percent of original size [2020-12-22 19:04:56,861 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:04:56,862 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:82, output treesize:8 [2020-12-22 19:04:57,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2020-12-22 19:04:57,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:57,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 48 [2020-12-22 19:04:57,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028465470] [2020-12-22 19:04:57,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 19:04:57,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:57,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 19:04:57,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=754, Invalid=1502, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 19:04:57,055 INFO L87 Difference]: Start difference. First operand 249 states and 268 transitions. Second operand 48 states. [2020-12-22 19:05:00,246 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-12-22 19:05:00,925 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2020-12-22 19:05:01,359 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2020-12-22 19:05:05,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:05,679 INFO L93 Difference]: Finished difference Result 728 states and 791 transitions. [2020-12-22 19:05:05,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-12-22 19:05:05,679 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 128 [2020-12-22 19:05:05,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:05,683 INFO L225 Difference]: With dead ends: 728 [2020-12-22 19:05:05,683 INFO L226 Difference]: Without dead ends: 728 [2020-12-22 19:05:05,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5549 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=5036, Invalid=11994, Unknown=0, NotChecked=0, Total=17030 [2020-12-22 19:05:05,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2020-12-22 19:05:05,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 257. [2020-12-22 19:05:05,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-12-22 19:05:05,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 276 transitions. [2020-12-22 19:05:05,699 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 276 transitions. Word has length 128 [2020-12-22 19:05:05,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:05,699 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 276 transitions. [2020-12-22 19:05:05,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 19:05:05,699 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 276 transitions. [2020-12-22 19:05:05,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 19:05:05,700 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:05,700 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:05,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 19:05:05,914 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:05:05,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:05,915 INFO L82 PathProgramCache]: Analyzing trace with hash -659990870, now seen corresponding path program 7 times [2020-12-22 19:05:05,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:05,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926474117] [2020-12-22 19:05:05,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:05,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:06,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1253 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 19:05:06,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926474117] [2020-12-22 19:05:06,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256238309] [2020-12-22 19:05:06,450 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:06,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:06,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 19:05:06,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:06,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1253 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 19:05:06,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:06,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-22 19:05:06,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134985486] [2020-12-22 19:05:06,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 19:05:06,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:06,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 19:05:06,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 19:05:06,726 INFO L87 Difference]: Start difference. First operand 257 states and 276 transitions. Second operand 29 states. [2020-12-22 19:05:07,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:07,479 INFO L93 Difference]: Finished difference Result 557 states and 583 transitions. [2020-12-22 19:05:07,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 19:05:07,479 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 138 [2020-12-22 19:05:07,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:07,482 INFO L225 Difference]: With dead ends: 557 [2020-12-22 19:05:07,482 INFO L226 Difference]: Without dead ends: 557 [2020-12-22 19:05:07,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 19:05:07,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2020-12-22 19:05:07,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 261. [2020-12-22 19:05:07,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-12-22 19:05:07,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 280 transitions. [2020-12-22 19:05:07,491 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 280 transitions. Word has length 138 [2020-12-22 19:05:07,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:07,491 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 280 transitions. [2020-12-22 19:05:07,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 19:05:07,491 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 280 transitions. [2020-12-22 19:05:07,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-22 19:05:07,492 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:07,492 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:07,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:07,707 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:05:07,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:07,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1669681389, now seen corresponding path program 8 times [2020-12-22 19:05:07,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:07,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477677763] [2020-12-22 19:05:07,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:07,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:08,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 19:05:08,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477677763] [2020-12-22 19:05:08,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326368255] [2020-12-22 19:05:08,296 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 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 19:05:08,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:05:08,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:08,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 19:05:08,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:08,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 19:05:08,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:08,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-22 19:05:08,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024295644] [2020-12-22 19:05:08,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 19:05:08,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:08,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 19:05:08,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 19:05:08,588 INFO L87 Difference]: Start difference. First operand 261 states and 280 transitions. Second operand 30 states. [2020-12-22 19:05:09,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:09,354 INFO L93 Difference]: Finished difference Result 578 states and 605 transitions. [2020-12-22 19:05:09,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 19:05:09,357 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 142 [2020-12-22 19:05:09,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:09,359 INFO L225 Difference]: With dead ends: 578 [2020-12-22 19:05:09,359 INFO L226 Difference]: Without dead ends: 578 [2020-12-22 19:05:09,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 19:05:09,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2020-12-22 19:05:09,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 265. [2020-12-22 19:05:09,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-12-22 19:05:09,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 284 transitions. [2020-12-22 19:05:09,366 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 284 transitions. Word has length 142 [2020-12-22 19:05:09,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:09,367 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 284 transitions. [2020-12-22 19:05:09,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 19:05:09,367 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 284 transitions. [2020-12-22 19:05:09,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-22 19:05:09,368 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:09,368 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:09,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:09,582 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:05:09,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:09,582 INFO L82 PathProgramCache]: Analyzing trace with hash -813403728, now seen corresponding path program 9 times [2020-12-22 19:05:09,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:09,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131265789] [2020-12-22 19:05:09,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:09,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1459 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 19:05:10,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131265789] [2020-12-22 19:05:10,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500195984] [2020-12-22 19:05:10,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:10,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 19:05:10,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:10,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 19:05:10,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:10,466 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 19 treesize of output 7 [2020-12-22 19:05:10,467 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:10,469 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:10,469 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 19:05:10,470 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-12-22 19:05:10,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1459 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 1431 trivial. 0 not checked. [2020-12-22 19:05:10,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:10,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 11] total 38 [2020-12-22 19:05:10,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578631578] [2020-12-22 19:05:10,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 19:05:10,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:10,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 19:05:10,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=590, Invalid=816, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 19:05:10,518 INFO L87 Difference]: Start difference. First operand 265 states and 284 transitions. Second operand 38 states. [2020-12-22 19:05:11,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:11,542 INFO L93 Difference]: Finished difference Result 615 states and 642 transitions. [2020-12-22 19:05:11,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 19:05:11,543 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 146 [2020-12-22 19:05:11,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:11,545 INFO L225 Difference]: With dead ends: 615 [2020-12-22 19:05:11,545 INFO L226 Difference]: Without dead ends: 598 [2020-12-22 19:05:11,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=652, Invalid=908, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 19:05:11,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2020-12-22 19:05:11,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 269. [2020-12-22 19:05:11,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-12-22 19:05:11,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 287 transitions. [2020-12-22 19:05:11,553 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 287 transitions. Word has length 146 [2020-12-22 19:05:11,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:11,553 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 287 transitions. [2020-12-22 19:05:11,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 19:05:11,553 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 287 transitions. [2020-12-22 19:05:11,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 19:05:11,554 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:11,554 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:11,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-22 19:05:11,771 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:05:11,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:11,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1109523459, now seen corresponding path program 10 times [2020-12-22 19:05:11,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:11,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774456049] [2020-12-22 19:05:11,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:12,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-12-22 19:05:12,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774456049] [2020-12-22 19:05:12,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492846961] [2020-12-22 19:05:12,426 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 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 19:05:13,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:05:13,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:13,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 19:05:13,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:13,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-12-22 19:05:13,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:13,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-22 19:05:13,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318700761] [2020-12-22 19:05:13,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 19:05:13,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:13,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 19:05:13,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 19:05:13,525 INFO L87 Difference]: Start difference. First operand 269 states and 287 transitions. Second operand 32 states. [2020-12-22 19:05:14,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:14,336 INFO L93 Difference]: Finished difference Result 619 states and 647 transitions. [2020-12-22 19:05:14,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 19:05:14,337 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 153 [2020-12-22 19:05:14,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:14,339 INFO L225 Difference]: With dead ends: 619 [2020-12-22 19:05:14,339 INFO L226 Difference]: Without dead ends: 619 [2020-12-22 19:05:14,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 19:05:14,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2020-12-22 19:05:14,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 273. [2020-12-22 19:05:14,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-12-22 19:05:14,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 291 transitions. [2020-12-22 19:05:14,348 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 291 transitions. Word has length 153 [2020-12-22 19:05:14,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:14,348 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 291 transitions. [2020-12-22 19:05:14,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 19:05:14,348 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 291 transitions. [2020-12-22 19:05:14,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-12-22 19:05:14,349 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:14,349 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:14,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:14,563 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:05:14,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:14,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1044393120, now seen corresponding path program 11 times [2020-12-22 19:05:14,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:14,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066109485] [2020-12-22 19:05:14,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:14,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:15,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1697 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-12-22 19:05:15,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066109485] [2020-12-22 19:05:15,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726537703] [2020-12-22 19:05:15,248 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 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 19:05:17,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-22 19:05:17,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:17,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 19:05:17,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:17,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1697 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-12-22 19:05:17,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:17,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-22 19:05:17,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872601357] [2020-12-22 19:05:17,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 19:05:17,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:17,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 19:05:17,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 19:05:17,466 INFO L87 Difference]: Start difference. First operand 273 states and 291 transitions. Second operand 33 states. [2020-12-22 19:05:18,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:18,352 INFO L93 Difference]: Finished difference Result 640 states and 669 transitions. [2020-12-22 19:05:18,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 19:05:18,352 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 157 [2020-12-22 19:05:18,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:18,355 INFO L225 Difference]: With dead ends: 640 [2020-12-22 19:05:18,355 INFO L226 Difference]: Without dead ends: 640 [2020-12-22 19:05:18,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 19:05:18,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2020-12-22 19:05:18,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 277. [2020-12-22 19:05:18,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-12-22 19:05:18,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 295 transitions. [2020-12-22 19:05:18,362 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 295 transitions. Word has length 157 [2020-12-22 19:05:18,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:18,363 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 295 transitions. [2020-12-22 19:05:18,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 19:05:18,363 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 295 transitions. [2020-12-22 19:05:18,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-22 19:05:18,364 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:18,364 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:18,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 19:05:18,579 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:05:18,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:18,579 INFO L82 PathProgramCache]: Analyzing trace with hash 95990845, now seen corresponding path program 12 times [2020-12-22 19:05:18,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:18,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292435284] [2020-12-22 19:05:18,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1814 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-12-22 19:05:19,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292435284] [2020-12-22 19:05:19,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687145523] [2020-12-22 19:05:19,245 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 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 19:05:19,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-22 19:05:19,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:19,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 19:05:19,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:19,514 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 19:05:19,516 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:19,521 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:19,522 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:19,522 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-22 19:05:19,740 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2020-12-22 19:05:19,741 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:19,752 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:19,753 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:19,753 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2020-12-22 19:05:19,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:19,828 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2020-12-22 19:05:19,829 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:19,842 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:19,843 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:19,843 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:29 [2020-12-22 19:05:19,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:19,902 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2020-12-22 19:05:19,904 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:19,917 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:19,919 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 19:05:19,919 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:26 [2020-12-22 19:05:20,087 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 26 treesize of output 10 [2020-12-22 19:05:20,089 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:20,094 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:20,095 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 19:05:20,096 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2020-12-22 19:05:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1814 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2020-12-22 19:05:20,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:20,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 15] total 46 [2020-12-22 19:05:20,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647400895] [2020-12-22 19:05:20,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 19:05:20,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:20,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 19:05:20,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=1283, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 19:05:20,251 INFO L87 Difference]: Start difference. First operand 277 states and 295 transitions. Second operand 46 states. [2020-12-22 19:05:24,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:24,264 INFO L93 Difference]: Finished difference Result 659 states and 689 transitions. [2020-12-22 19:05:24,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-12-22 19:05:24,264 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 161 [2020-12-22 19:05:24,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:24,268 INFO L225 Difference]: With dead ends: 659 [2020-12-22 19:05:24,268 INFO L226 Difference]: Without dead ends: 659 [2020-12-22 19:05:24,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3713, Invalid=8277, Unknown=0, NotChecked=0, Total=11990 [2020-12-22 19:05:24,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2020-12-22 19:05:24,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 267. [2020-12-22 19:05:24,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-12-22 19:05:24,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 284 transitions. [2020-12-22 19:05:24,277 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 284 transitions. Word has length 161 [2020-12-22 19:05:24,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:24,277 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 284 transitions. [2020-12-22 19:05:24,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 19:05:24,277 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 284 transitions. [2020-12-22 19:05:24,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-12-22 19:05:24,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:24,278 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:24,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 19:05:24,494 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:05:24,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:24,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1368343297, now seen corresponding path program 13 times [2020-12-22 19:05:24,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:24,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752523693] [2020-12-22 19:05:24,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:24,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:25,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1931 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-22 19:05:25,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752523693] [2020-12-22 19:05:25,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427393600] [2020-12-22 19:05:25,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:25,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:25,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 19:05:25,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:25,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1931 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-22 19:05:25,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:25,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-22 19:05:25,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644733283] [2020-12-22 19:05:25,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 19:05:25,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:25,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 19:05:25,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 19:05:25,561 INFO L87 Difference]: Start difference. First operand 267 states and 284 transitions. Second operand 35 states. [2020-12-22 19:05:26,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:26,516 INFO L93 Difference]: Finished difference Result 667 states and 698 transitions. [2020-12-22 19:05:26,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 19:05:26,517 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 167 [2020-12-22 19:05:26,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:26,522 INFO L225 Difference]: With dead ends: 667 [2020-12-22 19:05:26,522 INFO L226 Difference]: Without dead ends: 667 [2020-12-22 19:05:26,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 19:05:26,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2020-12-22 19:05:26,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 271. [2020-12-22 19:05:26,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-12-22 19:05:26,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 288 transitions. [2020-12-22 19:05:26,530 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 288 transitions. Word has length 167 [2020-12-22 19:05:26,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:26,531 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 288 transitions. [2020-12-22 19:05:26,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 19:05:26,531 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 288 transitions. [2020-12-22 19:05:26,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 19:05:26,532 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:26,532 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:26,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 19:05:26,746 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:05:26,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:26,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1520536674, now seen corresponding path program 14 times [2020-12-22 19:05:26,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:26,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932775989] [2020-12-22 19:05:26,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:27,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2056 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-22 19:05:27,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932775989] [2020-12-22 19:05:27,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467691465] [2020-12-22 19:05:27,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:27,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:05:27,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:27,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 19:05:27,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:27,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2056 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-22 19:05:27,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:27,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-22 19:05:27,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129711478] [2020-12-22 19:05:27,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 19:05:27,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:27,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 19:05:27,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 19:05:27,879 INFO L87 Difference]: Start difference. First operand 271 states and 288 transitions. Second operand 36 states. [2020-12-22 19:05:28,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:28,925 INFO L93 Difference]: Finished difference Result 688 states and 720 transitions. [2020-12-22 19:05:28,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 19:05:28,926 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 171 [2020-12-22 19:05:28,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:28,928 INFO L225 Difference]: With dead ends: 688 [2020-12-22 19:05:28,928 INFO L226 Difference]: Without dead ends: 688 [2020-12-22 19:05:28,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 19:05:28,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2020-12-22 19:05:28,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 275. [2020-12-22 19:05:28,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-12-22 19:05:28,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 292 transitions. [2020-12-22 19:05:28,939 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 292 transitions. Word has length 171 [2020-12-22 19:05:28,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:28,939 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 292 transitions. [2020-12-22 19:05:28,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 19:05:28,939 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 292 transitions. [2020-12-22 19:05:28,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-12-22 19:05:28,940 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:28,940 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:29,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 19:05:29,154 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:05:29,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:29,155 INFO L82 PathProgramCache]: Analyzing trace with hash 649727419, now seen corresponding path program 15 times [2020-12-22 19:05:29,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:29,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855351549] [2020-12-22 19:05:29,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:29,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-22 19:05:29,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855351549] [2020-12-22 19:05:29,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379195598] [2020-12-22 19:05:29,993 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:30,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 19:05:30,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:30,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 19:05:30,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:30,102 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 19:05:30,104 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:30,105 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:30,106 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:30,106 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:8, output treesize:4 [2020-12-22 19:05:30,287 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 19 treesize of output 19 [2020-12-22 19:05:30,288 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:30,294 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:30,294 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:30,294 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2020-12-22 19:05:30,502 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 34 treesize of output 10 [2020-12-22 19:05:30,503 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:30,507 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:30,508 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 19:05:30,508 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:38, output treesize:3 [2020-12-22 19:05:30,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2020-12-22 19:05:30,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:30,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 15] total 49 [2020-12-22 19:05:30,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702199696] [2020-12-22 19:05:30,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 19:05:30,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:30,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 19:05:30,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=970, Invalid=1382, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 19:05:30,632 INFO L87 Difference]: Start difference. First operand 275 states and 292 transitions. Second operand 49 states. [2020-12-22 19:05:34,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:34,935 INFO L93 Difference]: Finished difference Result 1042 states and 1075 transitions. [2020-12-22 19:05:34,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-12-22 19:05:34,936 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 175 [2020-12-22 19:05:34,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:34,939 INFO L225 Difference]: With dead ends: 1042 [2020-12-22 19:05:34,940 INFO L226 Difference]: Without dead ends: 1042 [2020-12-22 19:05:34,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3839 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4592, Invalid=8980, Unknown=0, NotChecked=0, Total=13572 [2020-12-22 19:05:34,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2020-12-22 19:05:34,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 300. [2020-12-22 19:05:34,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-12-22 19:05:34,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 317 transitions. [2020-12-22 19:05:34,949 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 317 transitions. Word has length 175 [2020-12-22 19:05:34,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:34,950 INFO L481 AbstractCegarLoop]: Abstraction has 300 states and 317 transitions. [2020-12-22 19:05:34,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 19:05:34,950 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 317 transitions. [2020-12-22 19:05:34,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-12-22 19:05:34,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:34,951 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:35,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 19:05:35,165 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:05:35,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:35,166 INFO L82 PathProgramCache]: Analyzing trace with hash -2091759387, now seen corresponding path program 16 times [2020-12-22 19:05:35,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:35,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173328776] [2020-12-22 19:05:35,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:35,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:36,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2335 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-22 19:05:36,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173328776] [2020-12-22 19:05:36,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41417565] [2020-12-22 19:05:36,104 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:37,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:05:37,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:37,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 19:05:37,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:37,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2335 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-22 19:05:37,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:37,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-22 19:05:37,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464269089] [2020-12-22 19:05:37,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 19:05:37,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:37,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 19:05:37,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 19:05:37,410 INFO L87 Difference]: Start difference. First operand 300 states and 317 transitions. Second operand 38 states. [2020-12-22 19:05:38,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:38,474 INFO L93 Difference]: Finished difference Result 750 states and 784 transitions. [2020-12-22 19:05:38,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 19:05:38,476 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 184 [2020-12-22 19:05:38,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:38,479 INFO L225 Difference]: With dead ends: 750 [2020-12-22 19:05:38,479 INFO L226 Difference]: Without dead ends: 750 [2020-12-22 19:05:38,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 19:05:38,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2020-12-22 19:05:38,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 304. [2020-12-22 19:05:38,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-12-22 19:05:38,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 321 transitions. [2020-12-22 19:05:38,485 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 321 transitions. Word has length 184 [2020-12-22 19:05:38,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:38,486 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 321 transitions. [2020-12-22 19:05:38,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 19:05:38,486 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 321 transitions. [2020-12-22 19:05:38,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-12-22 19:05:38,487 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:38,487 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:38,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 19:05:38,702 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:05:38,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:38,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1329645032, now seen corresponding path program 17 times [2020-12-22 19:05:38,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:38,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069872576] [2020-12-22 19:05:38,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:38,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2472 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-22 19:05:39,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069872576] [2020-12-22 19:05:39,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799121925] [2020-12-22 19:05:39,800 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:06:04,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2020-12-22 19:06:04,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:06:04,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 19:06:04,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:06:05,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2472 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-22 19:06:05,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:06:05,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-22 19:06:05,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694458018] [2020-12-22 19:06:05,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 19:06:05,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:05,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 19:06:05,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 19:06:05,090 INFO L87 Difference]: Start difference. First operand 304 states and 321 transitions. Second operand 39 states. [2020-12-22 19:06:06,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:06,327 INFO L93 Difference]: Finished difference Result 771 states and 806 transitions. [2020-12-22 19:06:06,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 19:06:06,327 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 188 [2020-12-22 19:06:06,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:06,330 INFO L225 Difference]: With dead ends: 771 [2020-12-22 19:06:06,330 INFO L226 Difference]: Without dead ends: 771 [2020-12-22 19:06:06,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 19:06:06,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2020-12-22 19:06:06,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 308. [2020-12-22 19:06:06,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-12-22 19:06:06,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 325 transitions. [2020-12-22 19:06:06,335 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 325 transitions. Word has length 188 [2020-12-22 19:06:06,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:06,335 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 325 transitions. [2020-12-22 19:06:06,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 19:06:06,335 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 325 transitions. [2020-12-22 19:06:06,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-12-22 19:06:06,336 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:06,336 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:06:06,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 19:06:06,537 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:06:06,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:06,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1439893867, now seen corresponding path program 18 times [2020-12-22 19:06:06,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:06,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502691508] [2020-12-22 19:06:06,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:06,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:07,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2613 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-22 19:06:07,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502691508] [2020-12-22 19:06:07,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114049503] [2020-12-22 19:06:07,576 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:06:07,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-22 19:06:07,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:06:07,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 19:06:07,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:06:07,776 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 19:06:07,779 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:06:07,785 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:06:07,786 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:06:07,786 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-22 19:06:08,088 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2020-12-22 19:06:08,089 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:06:08,101 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:06:08,102 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:06:08,102 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2020-12-22 19:06:08,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:06:08,190 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2020-12-22 19:06:08,191 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:06:08,214 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:06:08,215 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 19:06:08,216 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:26 [2020-12-22 19:06:08,452 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 26 treesize of output 10 [2020-12-22 19:06:08,453 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:06:08,457 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:06:08,458 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 19:06:08,459 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2020-12-22 19:06:08,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2613 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 2556 trivial. 0 not checked. [2020-12-22 19:06:08,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:06:08,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 16] total 53 [2020-12-22 19:06:08,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703388999] [2020-12-22 19:06:08,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-22 19:06:08,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:08,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-22 19:06:08,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1112, Invalid=1644, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 19:06:08,655 INFO L87 Difference]: Start difference. First operand 308 states and 325 transitions. Second operand 53 states. [2020-12-22 19:06:13,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:13,966 INFO L93 Difference]: Finished difference Result 790 states and 826 transitions. [2020-12-22 19:06:13,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-12-22 19:06:13,967 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 192 [2020-12-22 19:06:13,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:13,971 INFO L225 Difference]: With dead ends: 790 [2020-12-22 19:06:13,971 INFO L226 Difference]: Without dead ends: 790 [2020-12-22 19:06:13,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4328 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5059, Invalid=10943, Unknown=0, NotChecked=0, Total=16002 [2020-12-22 19:06:13,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2020-12-22 19:06:13,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 291. [2020-12-22 19:06:13,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-12-22 19:06:13,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 307 transitions. [2020-12-22 19:06:13,980 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 307 transitions. Word has length 192 [2020-12-22 19:06:13,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:13,981 INFO L481 AbstractCegarLoop]: Abstraction has 291 states and 307 transitions. [2020-12-22 19:06:13,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-22 19:06:13,981 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 307 transitions. [2020-12-22 19:06:13,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-12-22 19:06:13,982 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:13,983 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:06:14,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:06:14,197 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:06:14,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:14,198 INFO L82 PathProgramCache]: Analyzing trace with hash 2077401255, now seen corresponding path program 19 times [2020-12-22 19:06:14,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:14,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770389011] [2020-12-22 19:06:14,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:14,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:15,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2761 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-12-22 19:06:15,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770389011] [2020-12-22 19:06:15,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108778694] [2020-12-22 19:06:15,285 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:06:15,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:15,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 19:06:15,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:06:15,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2761 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-12-22 19:06:15,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:06:15,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-22 19:06:15,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441148974] [2020-12-22 19:06:15,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 19:06:15,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:15,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 19:06:15,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 19:06:15,676 INFO L87 Difference]: Start difference. First operand 291 states and 307 transitions. Second operand 41 states. [2020-12-22 19:06:16,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:16,997 INFO L93 Difference]: Finished difference Result 791 states and 828 transitions. [2020-12-22 19:06:16,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 19:06:16,997 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 198 [2020-12-22 19:06:17,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:17,005 INFO L225 Difference]: With dead ends: 791 [2020-12-22 19:06:17,005 INFO L226 Difference]: Without dead ends: 791 [2020-12-22 19:06:17,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 19:06:17,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2020-12-22 19:06:17,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 295. [2020-12-22 19:06:17,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-12-22 19:06:17,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 311 transitions. [2020-12-22 19:06:17,012 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 311 transitions. Word has length 198 [2020-12-22 19:06:17,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:17,013 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 311 transitions. [2020-12-22 19:06:17,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 19:06:17,013 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 311 transitions. [2020-12-22 19:06:17,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-12-22 19:06:17,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:17,014 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:06:17,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:06:17,229 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:06:17,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:17,229 INFO L82 PathProgramCache]: Analyzing trace with hash -4940694, now seen corresponding path program 20 times [2020-12-22 19:06:17,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:17,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364514628] [2020-12-22 19:06:17,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:17,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:18,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2910 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-12-22 19:06:18,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364514628] [2020-12-22 19:06:18,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995033210] [2020-12-22 19:06:18,433 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:06:18,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:06:18,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:06:18,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 19:06:18,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:06:18,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2910 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-12-22 19:06:18,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:06:18,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-22 19:06:18,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097546609] [2020-12-22 19:06:18,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 19:06:18,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:18,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 19:06:18,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 19:06:18,840 INFO L87 Difference]: Start difference. First operand 295 states and 311 transitions. Second operand 42 states. [2020-12-22 19:06:20,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:20,196 INFO L93 Difference]: Finished difference Result 812 states and 850 transitions. [2020-12-22 19:06:20,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 19:06:20,197 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 202 [2020-12-22 19:06:20,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:20,199 INFO L225 Difference]: With dead ends: 812 [2020-12-22 19:06:20,199 INFO L226 Difference]: Without dead ends: 812 [2020-12-22 19:06:20,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 19:06:20,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2020-12-22 19:06:20,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 299. [2020-12-22 19:06:20,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-12-22 19:06:20,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 315 transitions. [2020-12-22 19:06:20,205 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 315 transitions. Word has length 202 [2020-12-22 19:06:20,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:20,206 INFO L481 AbstractCegarLoop]: Abstraction has 299 states and 315 transitions. [2020-12-22 19:06:20,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 19:06:20,206 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 315 transitions. [2020-12-22 19:06:20,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-12-22 19:06:20,207 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:20,207 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:06:20,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:06:20,421 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:06:20,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:20,422 INFO L82 PathProgramCache]: Analyzing trace with hash -2032337235, now seen corresponding path program 21 times [2020-12-22 19:06:20,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:20,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675300359] [2020-12-22 19:06:20,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:21,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3063 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-12-22 19:06:21,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675300359] [2020-12-22 19:06:21,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085274596] [2020-12-22 19:06:21,618 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:06:21,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 19:06:21,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:06:21,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 19:06:21,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:06:22,112 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 19 treesize of output 7 [2020-12-22 19:06:22,116 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:06:22,119 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:06:22,119 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:06:22,119 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-12-22 19:06:22,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3063 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 3003 trivial. 0 not checked. [2020-12-22 19:06:22,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:06:22,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 13] total 52 [2020-12-22 19:06:22,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263443300] [2020-12-22 19:06:22,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-22 19:06:22,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:22,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-22 19:06:22,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1156, Invalid=1496, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 19:06:22,191 INFO L87 Difference]: Start difference. First operand 299 states and 315 transitions. Second operand 52 states. [2020-12-22 19:06:23,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:23,905 INFO L93 Difference]: Finished difference Result 856 states and 894 transitions. [2020-12-22 19:06:23,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-22 19:06:23,906 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 206 [2020-12-22 19:06:23,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:23,909 INFO L225 Difference]: With dead ends: 856 [2020-12-22 19:06:23,909 INFO L226 Difference]: Without dead ends: 832 [2020-12-22 19:06:23,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1240, Invalid=1622, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 19:06:23,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2020-12-22 19:06:23,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 303. [2020-12-22 19:06:23,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-12-22 19:06:23,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 318 transitions. [2020-12-22 19:06:23,916 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 318 transitions. Word has length 206 [2020-12-22 19:06:23,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:23,917 INFO L481 AbstractCegarLoop]: Abstraction has 303 states and 318 transitions. [2020-12-22 19:06:23,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-22 19:06:23,917 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 318 transitions. [2020-12-22 19:06:23,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-12-22 19:06:23,918 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:23,918 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:06:24,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-22 19:06:24,133 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:06:24,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:24,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1563073631, now seen corresponding path program 22 times [2020-12-22 19:06:24,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:24,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734826188] [2020-12-22 19:06:24,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:24,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3237 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-22 19:06:25,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734826188] [2020-12-22 19:06:25,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339260431] [2020-12-22 19:06:25,434 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:06:25,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:06:25,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:06:25,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 19:06:25,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:06:25,780 INFO L348 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2020-12-22 19:06:25,781 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 19 treesize of output 19 [2020-12-22 19:06:25,783 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:06:25,785 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:06:25,786 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:06:25,786 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-12-22 19:06:26,028 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:06:26,028 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 34 treesize of output 26 [2020-12-22 19:06:26,030 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:06:26,032 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:06:26,032 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 19:06:26,033 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:34, output treesize:3 [2020-12-22 19:06:26,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3237 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 3160 trivial. 0 not checked. [2020-12-22 19:06:26,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:06:26,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 16] total 56 [2020-12-22 19:06:26,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264294889] [2020-12-22 19:06:26,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-22 19:06:26,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:26,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-22 19:06:26,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1332, Invalid=1748, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 19:06:26,211 INFO L87 Difference]: Start difference. First operand 303 states and 318 transitions. Second operand 56 states. [2020-12-22 19:06:30,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:30,185 INFO L93 Difference]: Finished difference Result 1254 states and 1293 transitions. [2020-12-22 19:06:30,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-12-22 19:06:30,185 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 215 [2020-12-22 19:06:30,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:30,189 INFO L225 Difference]: With dead ends: 1254 [2020-12-22 19:06:30,189 INFO L226 Difference]: Without dead ends: 1254 [2020-12-22 19:06:30,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2670 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3575, Invalid=6325, Unknown=0, NotChecked=0, Total=9900 [2020-12-22 19:06:30,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2020-12-22 19:06:30,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 335. [2020-12-22 19:06:30,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2020-12-22 19:06:30,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 350 transitions. [2020-12-22 19:06:30,198 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 350 transitions. Word has length 215 [2020-12-22 19:06:30,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:30,198 INFO L481 AbstractCegarLoop]: Abstraction has 335 states and 350 transitions. [2020-12-22 19:06:30,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-22 19:06:30,199 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 350 transitions. [2020-12-22 19:06:30,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-12-22 19:06:30,200 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:30,200 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1] [2020-12-22 19:06:30,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:06:30,416 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:06:30,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:30,416 INFO L82 PathProgramCache]: Analyzing trace with hash 868122504, now seen corresponding path program 4 times [2020-12-22 19:06:30,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:30,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843949303] [2020-12-22 19:06:30,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:31,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3607 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2020-12-22 19:06:31,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843949303] [2020-12-22 19:06:31,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251603577] [2020-12-22 19:06:31,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:06:38,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:06:38,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:06:38,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 19:06:38,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:06:39,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3607 backedges. 242 proven. 1654 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2020-12-22 19:06:39,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:06:39,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 27] total 70 [2020-12-22 19:06:39,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174482279] [2020-12-22 19:06:39,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-22 19:06:39,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:39,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-22 19:06:39,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1557, Invalid=3273, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 19:06:39,872 INFO L87 Difference]: Start difference. First operand 335 states and 350 transitions. Second operand 70 states. [2020-12-22 19:06:45,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:45,619 INFO L93 Difference]: Finished difference Result 900 states and 940 transitions. [2020-12-22 19:06:45,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 19:06:45,620 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 224 [2020-12-22 19:06:45,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:45,624 INFO L225 Difference]: With dead ends: 900 [2020-12-22 19:06:45,624 INFO L226 Difference]: Without dead ends: 900 [2020-12-22 19:06:45,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3275 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3596, Invalid=9286, Unknown=0, NotChecked=0, Total=12882 [2020-12-22 19:06:45,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2020-12-22 19:06:45,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 351. [2020-12-22 19:06:45,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-12-22 19:06:45,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 368 transitions. [2020-12-22 19:06:45,631 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 368 transitions. Word has length 224 [2020-12-22 19:06:45,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:45,631 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 368 transitions. [2020-12-22 19:06:45,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-22 19:06:45,632 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 368 transitions. [2020-12-22 19:06:45,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-12-22 19:06:45,633 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:45,633 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:06:45,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:06:45,847 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:06:45,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:45,847 INFO L82 PathProgramCache]: Analyzing trace with hash 808499798, now seen corresponding path program 23 times [2020-12-22 19:06:45,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:45,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777269339] [2020-12-22 19:06:45,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:45,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:47,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3585 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2020-12-22 19:06:47,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777269339] [2020-12-22 19:06:47,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460664702] [2020-12-22 19:06:47,327 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:07:48,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2020-12-22 19:07:48,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:07:48,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-22 19:07:48,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:07:49,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3585 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2020-12-22 19:07:49,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:07:49,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-22 19:07:49,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549675179] [2020-12-22 19:07:49,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 19:07:49,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:07:49,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 19:07:49,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 19:07:49,173 INFO L87 Difference]: Start difference. First operand 351 states and 368 transitions. Second operand 46 states. [2020-12-22 19:07:50,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:07:50,797 INFO L93 Difference]: Finished difference Result 920 states and 961 transitions. [2020-12-22 19:07:50,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-22 19:07:50,798 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 228 [2020-12-22 19:07:50,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:07:50,801 INFO L225 Difference]: With dead ends: 920 [2020-12-22 19:07:50,801 INFO L226 Difference]: Without dead ends: 920 [2020-12-22 19:07:50,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 19:07:50,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2020-12-22 19:07:50,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 355. [2020-12-22 19:07:50,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-12-22 19:07:50,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 372 transitions. [2020-12-22 19:07:50,806 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 372 transitions. Word has length 228 [2020-12-22 19:07:50,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:07:50,806 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 372 transitions. [2020-12-22 19:07:50,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 19:07:50,806 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 372 transitions. [2020-12-22 19:07:50,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-12-22 19:07:50,807 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:07:50,807 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:07:51,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-22 19:07:51,008 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:07:51,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:07:51,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1644560679, now seen corresponding path program 24 times [2020-12-22 19:07:51,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:07:51,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531562074] [2020-12-22 19:07:51,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:07:51,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:07:52,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3754 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2020-12-22 19:07:52,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531562074] [2020-12-22 19:07:52,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059182971] [2020-12-22 19:07:52,429 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:07:52,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-22 19:07:52,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:07:52,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 19:07:52,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:07:52,908 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 19:07:52,910 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:07:52,918 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:07:52,918 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:07:52,919 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-22 19:07:53,309 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2020-12-22 19:07:53,311 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:07:53,324 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:07:53,324 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:07:53,325 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2020-12-22 19:07:53,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:07:53,442 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2020-12-22 19:07:53,444 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:07:53,460 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:07:53,462 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 19:07:53,462 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:26 [2020-12-22 19:07:53,791 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 26 treesize of output 10 [2020-12-22 19:07:53,792 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:07:53,797 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:07:53,799 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 19:07:53,799 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2020-12-22 19:07:54,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3754 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 3655 trivial. 0 not checked. [2020-12-22 19:07:54,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:07:54,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 18] total 62 [2020-12-22 19:07:54,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054345854] [2020-12-22 19:07:54,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-22 19:07:54,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:07:54,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-22 19:07:54,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1556, Invalid=2226, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 19:07:54,079 INFO L87 Difference]: Start difference. First operand 355 states and 372 transitions. Second operand 62 states. [2020-12-22 19:08:01,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:08:01,990 INFO L93 Difference]: Finished difference Result 939 states and 981 transitions. [2020-12-22 19:08:01,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-12-22 19:08:01,990 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 232 [2020-12-22 19:08:01,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:08:01,994 INFO L225 Difference]: With dead ends: 939 [2020-12-22 19:08:01,994 INFO L226 Difference]: Without dead ends: 939 [2020-12-22 19:08:01,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5967 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=6870, Invalid=14886, Unknown=0, NotChecked=0, Total=21756 [2020-12-22 19:08:01,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2020-12-22 19:08:02,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 331. [2020-12-22 19:08:02,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-12-22 19:08:02,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 347 transitions. [2020-12-22 19:08:02,002 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 347 transitions. Word has length 232 [2020-12-22 19:08:02,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:08:02,002 INFO L481 AbstractCegarLoop]: Abstraction has 331 states and 347 transitions. [2020-12-22 19:08:02,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-22 19:08:02,003 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 347 transitions. [2020-12-22 19:08:02,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-12-22 19:08:02,004 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:08:02,004 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:08:02,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-22 19:08:02,218 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:08:02,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:08:02,218 INFO L82 PathProgramCache]: Analyzing trace with hash -872213117, now seen corresponding path program 25 times [2020-12-22 19:08:02,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:08:02,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312032016] [2020-12-22 19:08:02,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:08:02,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:08:03,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3932 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-12-22 19:08:03,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312032016] [2020-12-22 19:08:03,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683776516] [2020-12-22 19:08:03,894 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:08:04,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:08:04,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 19:08:04,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:08:04,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3932 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-12-22 19:08:04,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:08:04,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-22 19:08:04,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390901208] [2020-12-22 19:08:04,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 19:08:04,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:08:04,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 19:08:04,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 19:08:04,381 INFO L87 Difference]: Start difference. First operand 331 states and 347 transitions. Second operand 48 states. [2020-12-22 19:08:06,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:08:06,195 INFO L93 Difference]: Finished difference Result 933 states and 976 transitions. [2020-12-22 19:08:06,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 19:08:06,196 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 238 [2020-12-22 19:08:06,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:08:06,199 INFO L225 Difference]: With dead ends: 933 [2020-12-22 19:08:06,199 INFO L226 Difference]: Without dead ends: 933 [2020-12-22 19:08:06,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 19:08:06,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2020-12-22 19:08:06,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 335. [2020-12-22 19:08:06,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2020-12-22 19:08:06,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 351 transitions. [2020-12-22 19:08:06,209 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 351 transitions. Word has length 238 [2020-12-22 19:08:06,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:08:06,210 INFO L481 AbstractCegarLoop]: Abstraction has 335 states and 351 transitions. [2020-12-22 19:08:06,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 19:08:06,210 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 351 transitions. [2020-12-22 19:08:06,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-12-22 19:08:06,211 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:08:06,211 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:08:06,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-22 19:08:06,426 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:08:06,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:08:06,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1125044806, now seen corresponding path program 26 times [2020-12-22 19:08:06,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:08:06,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585260885] [2020-12-22 19:08:06,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:08:06,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:08:08,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4109 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-12-22 19:08:08,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585260885] [2020-12-22 19:08:08,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304933732] [2020-12-22 19:08:08,089 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:08:08,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:08:08,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:08:08,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 19:08:08,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:08:08,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4109 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-12-22 19:08:08,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:08:08,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-22 19:08:08,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554908805] [2020-12-22 19:08:08,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 19:08:08,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:08:08,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 19:08:08,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 19:08:08,572 INFO L87 Difference]: Start difference. First operand 335 states and 351 transitions. Second operand 49 states. [2020-12-22 19:08:10,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:08:10,520 INFO L93 Difference]: Finished difference Result 954 states and 998 transitions. [2020-12-22 19:08:10,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-22 19:08:10,520 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 242 [2020-12-22 19:08:10,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:08:10,523 INFO L225 Difference]: With dead ends: 954 [2020-12-22 19:08:10,524 INFO L226 Difference]: Without dead ends: 954 [2020-12-22 19:08:10,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 19:08:10,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2020-12-22 19:08:10,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 339. [2020-12-22 19:08:10,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-12-22 19:08:10,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 355 transitions. [2020-12-22 19:08:10,531 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 355 transitions. Word has length 242 [2020-12-22 19:08:10,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:08:10,532 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 355 transitions. [2020-12-22 19:08:10,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 19:08:10,532 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 355 transitions. [2020-12-22 19:08:10,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-12-22 19:08:10,533 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:08:10,533 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:08:10,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:08:10,749 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:08:10,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:08:10,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1600621175, now seen corresponding path program 27 times [2020-12-22 19:08:10,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:08:10,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356704662] [2020-12-22 19:08:10,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:08:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:08:12,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-12-22 19:08:12,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356704662] [2020-12-22 19:08:12,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230047535] [2020-12-22 19:08:12,535 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:08:12,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-22 19:08:12,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:08:12,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 19:08:12,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:08:13,280 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 19:08:13,281 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:08:13,283 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:08:13,284 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:08:13,284 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2020-12-22 19:08:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 16 proven. 88 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2020-12-22 19:08:13,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:08:13,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 16] total 63 [2020-12-22 19:08:13,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143795450] [2020-12-22 19:08:13,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-22 19:08:13,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:08:13,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-22 19:08:13,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1676, Invalid=2230, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 19:08:13,425 INFO L87 Difference]: Start difference. First operand 339 states and 355 transitions. Second operand 63 states. [2020-12-22 19:08:17,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:08:17,960 INFO L93 Difference]: Finished difference Result 1005 states and 1049 transitions. [2020-12-22 19:08:17,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-22 19:08:17,961 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 246 [2020-12-22 19:08:17,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:08:17,965 INFO L225 Difference]: With dead ends: 1005 [2020-12-22 19:08:17,965 INFO L226 Difference]: Without dead ends: 974 [2020-12-22 19:08:17,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2645 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4168, Invalid=7174, Unknown=0, NotChecked=0, Total=11342 [2020-12-22 19:08:17,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2020-12-22 19:08:17,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 343. [2020-12-22 19:08:17,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-12-22 19:08:17,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 358 transitions. [2020-12-22 19:08:17,972 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 358 transitions. Word has length 246 [2020-12-22 19:08:17,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:08:17,972 INFO L481 AbstractCegarLoop]: Abstraction has 343 states and 358 transitions. [2020-12-22 19:08:17,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-22 19:08:17,972 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 358 transitions. [2020-12-22 19:08:17,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-12-22 19:08:17,974 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:08:17,974 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1] [2020-12-22 19:08:18,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:08:18,188 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:08:18,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:08:18,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1107208641, now seen corresponding path program 5 times [2020-12-22 19:08:18,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:08:18,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994906689] [2020-12-22 19:08:18,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:08:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:08:19,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4713 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2020-12-22 19:08:19,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994906689] [2020-12-22 19:08:19,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674336936] [2020-12-22 19:08:19,971 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true