/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/memsafety-ext3/getNumbers2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 17:36:00,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 17:36:00,068 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 17:36:00,126 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 17:36:00,127 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 17:36:00,131 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 17:36:00,134 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 17:36:00,140 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 17:36:00,143 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 17:36:00,149 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 17:36:00,154 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 17:36:00,156 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 17:36:00,156 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 17:36:00,159 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 17:36:00,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 17:36:00,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 17:36:00,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 17:36:00,168 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 17:36:00,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 17:36:00,183 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 17:36:00,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 17:36:00,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 17:36:00,208 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 17:36:00,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 17:36:00,216 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 17:36:00,221 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 17:36:00,222 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 17:36:00,223 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 17:36:00,224 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 17:36:00,225 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 17:36:00,226 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 17:36:00,226 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 17:36:00,227 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 17:36:00,227 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 17:36:00,228 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 17:36:00,229 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 17:36:00,230 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-23 17:36:00,256 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 17:36:00,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 17:36:00,258 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 17:36:00,258 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 17:36:00,258 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 17:36:00,259 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 17:36:00,259 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 17:36:00,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 17:36:00,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 17:36:00,260 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 17:36:00,260 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 17:36:00,260 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 17:36:00,261 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 17:36:00,261 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 17:36:00,261 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 17:36:00,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 17:36:00,262 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 17:36:00,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 17:36:00,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 17:36:00,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 17:36:00,263 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 17:36:00,263 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 17:36:00,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 17:36:00,264 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 17:36:00,264 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 17:36:00,617 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 17:36:00,648 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 17:36:00,651 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 17:36:00,652 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 17:36:00,653 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 17:36:00,654 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext3/getNumbers2.c [2020-12-23 17:36:00,724 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/06aa83ee2/4880db29d2c642418af5ac4a4fa41260/FLAGb9307f1e5 [2020-12-23 17:36:01,276 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 17:36:01,276 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/memsafety-ext3/getNumbers2.c [2020-12-23 17:36:01,284 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/06aa83ee2/4880db29d2c642418af5ac4a4fa41260/FLAGb9307f1e5 [2020-12-23 17:36:01,645 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/06aa83ee2/4880db29d2c642418af5ac4a4fa41260 [2020-12-23 17:36:01,650 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 17:36:01,653 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 17:36:01,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 17:36:01,658 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 17:36:01,663 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 17:36:01,666 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 05:36:01" (1/1) ... [2020-12-23 17:36:01,669 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25643409 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:36:01, skipping insertion in model container [2020-12-23 17:36:01,670 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 05:36:01" (1/1) ... [2020-12-23 17:36:01,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 17:36:01,697 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~array~0,GLOBAL],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~numbers2~0,],[IdentifierExpression[~i~1,]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~numbers~1,],base],StructAccessExpression[IdentifierExpression[~numbers~1,],offset]]] [2020-12-23 17:36:01,937 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 17:36:01,961 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#array~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#array~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#numbers2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#numbers2~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~1,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~numbers~1,],base],StructAccessExpression[IdentifierExpression[~numbers~1,],offset]]] [2020-12-23 17:36:01,986 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 17:36:02,008 INFO L208 MainTranslator]: Completed translation [2020-12-23 17:36:02,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:36:02 WrapperNode [2020-12-23 17:36:02,009 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 17:36:02,011 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 17:36:02,011 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 17:36:02,011 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 17:36:02,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:36:02" (1/1) ... [2020-12-23 17:36:02,032 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:36:02" (1/1) ... [2020-12-23 17:36:02,057 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 17:36:02,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 17:36:02,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 17:36:02,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 17:36:02,068 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:36:02" (1/1) ... [2020-12-23 17:36:02,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:36:02" (1/1) ... [2020-12-23 17:36:02,080 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:36:02" (1/1) ... [2020-12-23 17:36:02,080 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:36:02" (1/1) ... [2020-12-23 17:36:02,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:36:02" (1/1) ... [2020-12-23 17:36:02,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:36:02" (1/1) ... [2020-12-23 17:36:02,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:36:02" (1/1) ... [2020-12-23 17:36:02,112 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 17:36:02,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 17:36:02,115 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 17:36:02,115 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 17:36:02,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:36:02" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 17:36:02,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 17:36:02,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 17:36:02,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 17:36:02,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 17:36:02,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 17:36:02,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 17:36:02,507 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 17:36:02,507 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-23 17:36:02,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:36:02 BoogieIcfgContainer [2020-12-23 17:36:02,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 17:36:02,511 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 17:36:02,512 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 17:36:02,517 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 17:36:02,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 05:36:01" (1/3) ... [2020-12-23 17:36:02,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76e3e2a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 05:36:02, skipping insertion in model container [2020-12-23 17:36:02,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:36:02" (2/3) ... [2020-12-23 17:36:02,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76e3e2a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 05:36:02, skipping insertion in model container [2020-12-23 17:36:02,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:36:02" (3/3) ... [2020-12-23 17:36:02,525 INFO L111 eAbstractionObserver]: Analyzing ICFG getNumbers2.c [2020-12-23 17:36:02,540 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 17:36:02,552 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2020-12-23 17:36:02,594 INFO L253 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2020-12-23 17:36:02,634 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 17:36:02,634 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 17:36:02,634 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 17:36:02,634 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 17:36:02,635 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 17:36:02,635 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 17:36:02,635 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 17:36:02,635 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 17:36:02,654 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-12-23 17:36:02,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-23 17:36:02,664 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:02,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-23 17:36:02,668 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:02,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:02,677 INFO L82 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2020-12-23 17:36:02,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:02,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553147428] [2020-12-23 17:36:02,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:02,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:02,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:36:02,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553147428] [2020-12-23 17:36:02,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:36:02,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-23 17:36:02,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388453038] [2020-12-23 17:36:02,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:36:02,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:02,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:36:02,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:36:02,940 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2020-12-23 17:36:03,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:03,039 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-12-23 17:36:03,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:36:03,045 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-23 17:36:03,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:03,062 INFO L225 Difference]: With dead ends: 27 [2020-12-23 17:36:03,062 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 17:36:03,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:36:03,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 17:36:03,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-23 17:36:03,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 17:36:03,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-12-23 17:36:03,106 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 4 [2020-12-23 17:36:03,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:03,107 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-12-23 17:36:03,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:36:03,107 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-12-23 17:36:03,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-23 17:36:03,108 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:03,108 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-23 17:36:03,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 17:36:03,110 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:03,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:03,114 INFO L82 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2020-12-23 17:36:03,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:03,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235904570] [2020-12-23 17:36:03,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:03,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:03,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:36:03,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235904570] [2020-12-23 17:36:03,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:36:03,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 17:36:03,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015725181] [2020-12-23 17:36:03,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 17:36:03,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:03,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 17:36:03,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 17:36:03,299 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 4 states. [2020-12-23 17:36:03,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:03,355 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-12-23 17:36:03,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 17:36:03,356 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-12-23 17:36:03,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:03,357 INFO L225 Difference]: With dead ends: 28 [2020-12-23 17:36:03,357 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 17:36:03,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 17:36:03,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 17:36:03,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-12-23 17:36:03,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 17:36:03,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-12-23 17:36:03,363 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 4 [2020-12-23 17:36:03,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:03,363 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-12-23 17:36:03,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 17:36:03,364 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-12-23 17:36:03,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 17:36:03,364 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:03,364 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2020-12-23 17:36:03,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 17:36:03,365 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:03,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:03,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1809646286, now seen corresponding path program 1 times [2020-12-23 17:36:03,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:03,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782922519] [2020-12-23 17:36:03,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:03,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:03,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:36:03,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782922519] [2020-12-23 17:36:03,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428741459] [2020-12-23 17:36:03,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 17:36:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:03,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 17:36:03,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:36:03,625 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 17:36:03,626 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:36:03,634 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:36:03,637 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 17:36:03,637 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-23 17:36:03,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:36:03,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:36:03,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2020-12-23 17:36:03,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56303920] [2020-12-23 17:36:03,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 17:36:03,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:03,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 17:36:03,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 17:36:03,732 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 7 states. [2020-12-23 17:36:03,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:03,880 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-12-23 17:36:03,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 17:36:03,881 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2020-12-23 17:36:03,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:03,882 INFO L225 Difference]: With dead ends: 31 [2020-12-23 17:36:03,882 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 17:36:03,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-23 17:36:03,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 17:36:03,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-23 17:36:03,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 17:36:03,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-12-23 17:36:03,887 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 7 [2020-12-23 17:36:03,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:03,888 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-12-23 17:36:03,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 17:36:03,888 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-12-23 17:36:03,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 17:36:03,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:03,889 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:36:04,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 17:36:04,104 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:04,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:04,106 INFO L82 PathProgramCache]: Analyzing trace with hash -118451422, now seen corresponding path program 1 times [2020-12-23 17:36:04,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:04,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527575247] [2020-12-23 17:36:04,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:04,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:04,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:36:04,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527575247] [2020-12-23 17:36:04,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957920217] [2020-12-23 17:36:04,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 17:36:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:04,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 17:36:04,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:36:04,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:36:04,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:36:04,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 17:36:04,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394146551] [2020-12-23 17:36:04,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 17:36:04,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:04,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 17:36:04,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 17:36:04,301 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 7 states. [2020-12-23 17:36:04,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:04,332 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-12-23 17:36:04,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 17:36:04,333 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-23 17:36:04,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:04,334 INFO L225 Difference]: With dead ends: 36 [2020-12-23 17:36:04,334 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 17:36:04,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 17:36:04,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 17:36:04,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-12-23 17:36:04,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 17:36:04,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-12-23 17:36:04,339 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 16 [2020-12-23 17:36:04,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:04,339 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-12-23 17:36:04,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 17:36:04,339 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-12-23 17:36:04,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 17:36:04,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:04,340 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:36:04,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:36:04,556 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:04,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:04,558 INFO L82 PathProgramCache]: Analyzing trace with hash -2129139286, now seen corresponding path program 2 times [2020-12-23 17:36:04,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:04,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845470924] [2020-12-23 17:36:04,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:04,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:04,678 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:36:04,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845470924] [2020-12-23 17:36:04,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223957629] [2020-12-23 17:36:04,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 17:36:04,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 17:36:04,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:36:04,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 17:36:04,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:36:04,761 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 17:36:04,763 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:36:04,769 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:36:04,771 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 17:36:04,771 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-23 17:36:04,905 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:36:04,906 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 28 [2020-12-23 17:36:04,910 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:36:04,932 INFO L625 ElimStorePlain]: treesize reduction 14, result has 54.8 percent of original size [2020-12-23 17:36:04,935 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. [2020-12-23 17:36:04,936 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:17 [2020-12-23 17:36:04,971 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 17:36:04,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 17:36:04,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2020-12-23 17:36:04,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055599916] [2020-12-23 17:36:04,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 17:36:04,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:04,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 17:36:04,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-23 17:36:04,974 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 5 states. [2020-12-23 17:36:05,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:05,067 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2020-12-23 17:36:05,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 17:36:05,068 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-12-23 17:36:05,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:05,069 INFO L225 Difference]: With dead ends: 42 [2020-12-23 17:36:05,069 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 17:36:05,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-12-23 17:36:05,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 17:36:05,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2020-12-23 17:36:05,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 17:36:05,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-12-23 17:36:05,074 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 19 [2020-12-23 17:36:05,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:05,074 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-12-23 17:36:05,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 17:36:05,074 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-12-23 17:36:05,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 17:36:05,075 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:05,075 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:36:05,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:36:05,290 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:05,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:05,291 INFO L82 PathProgramCache]: Analyzing trace with hash -2129139287, now seen corresponding path program 1 times [2020-12-23 17:36:05,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:05,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303496175] [2020-12-23 17:36:05,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:05,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:05,361 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:36:05,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303496175] [2020-12-23 17:36:05,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340091897] [2020-12-23 17:36:05,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 17:36:05,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:05,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 17:36:05,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:36:05,450 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:36:05,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:36:05,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 17:36:05,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847288198] [2020-12-23 17:36:05,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 17:36:05,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:05,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 17:36:05,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:36:05,453 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 8 states. [2020-12-23 17:36:05,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:05,488 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-12-23 17:36:05,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 17:36:05,489 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-12-23 17:36:05,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:05,490 INFO L225 Difference]: With dead ends: 41 [2020-12-23 17:36:05,490 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 17:36:05,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:36:05,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 17:36:05,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-12-23 17:36:05,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 17:36:05,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-12-23 17:36:05,496 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 19 [2020-12-23 17:36:05,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:05,497 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-12-23 17:36:05,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 17:36:05,497 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-12-23 17:36:05,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 17:36:05,497 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:05,498 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:36:05,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:36:05,712 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:05,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:05,713 INFO L82 PathProgramCache]: Analyzing trace with hash -622418399, now seen corresponding path program 2 times [2020-12-23 17:36:05,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:05,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77217249] [2020-12-23 17:36:05,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:05,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:36:05,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77217249] [2020-12-23 17:36:05,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865384892] [2020-12-23 17:36:05,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 17:36:05,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 17:36:05,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:36:05,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 17:36:05,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:36:05,925 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:36:05,926 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-23 17:36:05,928 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:36:05,943 INFO L625 ElimStorePlain]: treesize reduction 10, result has 60.0 percent of original size [2020-12-23 17:36:05,944 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 17:36:05,944 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:9, output treesize:15 [2020-12-23 17:36:06,010 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 17:36:06,083 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:36:06,083 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 58 [2020-12-23 17:36:06,087 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:36:06,108 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:36:06,108 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 28 [2020-12-23 17:36:06,112 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 17:36:06,167 INFO L625 ElimStorePlain]: treesize reduction 42, result has 45.5 percent of original size [2020-12-23 17:36:06,177 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 17:36:06,179 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2020-12-23 17:36:06,180 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:33, output treesize:35 [2020-12-23 17:36:06,185 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 17:36:06,232 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 17:36:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 17:36:06,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 17:36:06,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 11 [2020-12-23 17:36:06,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095210929] [2020-12-23 17:36:06,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 17:36:06,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:06,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 17:36:06,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-23 17:36:06,261 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 5 states. [2020-12-23 17:36:06,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:06,376 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-12-23 17:36:06,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 17:36:06,376 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-12-23 17:36:06,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:06,377 INFO L225 Difference]: With dead ends: 38 [2020-12-23 17:36:06,377 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 17:36:06,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-12-23 17:36:06,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 17:36:06,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-23 17:36:06,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 17:36:06,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-12-23 17:36:06,382 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 22 [2020-12-23 17:36:06,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:06,382 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-12-23 17:36:06,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 17:36:06,382 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-12-23 17:36:06,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 17:36:06,383 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:06,383 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:36:06,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 17:36:06,597 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:06,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:06,598 INFO L82 PathProgramCache]: Analyzing trace with hash -2115101182, now seen corresponding path program 1 times [2020-12-23 17:36:06,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:06,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181116527] [2020-12-23 17:36:06,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:06,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:06,635 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 17:36:06,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181116527] [2020-12-23 17:36:06,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:36:06,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 17:36:06,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724861218] [2020-12-23 17:36:06,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:36:06,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:06,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:36:06,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:36:06,638 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 3 states. [2020-12-23 17:36:06,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:06,654 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-12-23 17:36:06,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:36:06,655 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-12-23 17:36:06,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:06,656 INFO L225 Difference]: With dead ends: 37 [2020-12-23 17:36:06,656 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 17:36:06,656 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 [2020-12-23 17:36:06,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 17:36:06,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-23 17:36:06,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 17:36:06,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-12-23 17:36:06,660 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 23 [2020-12-23 17:36:06,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:06,660 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-12-23 17:36:06,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:36:06,660 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-12-23 17:36:06,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 17:36:06,661 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:06,661 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:36:06,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-23 17:36:06,661 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:06,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:06,662 INFO L82 PathProgramCache]: Analyzing trace with hash -2115101181, now seen corresponding path program 1 times [2020-12-23 17:36:06,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:06,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222364815] [2020-12-23 17:36:06,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:36:06,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222364815] [2020-12-23 17:36:06,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813784734] [2020-12-23 17:36:06,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 17:36:06,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:06,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 17:36:06,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:36:06,823 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:36:06,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:36:06,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 17:36:06,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677776868] [2020-12-23 17:36:06,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 17:36:06,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:06,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 17:36:06,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 17:36:06,825 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 9 states. [2020-12-23 17:36:06,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:06,864 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2020-12-23 17:36:06,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 17:36:06,865 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-12-23 17:36:06,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:06,865 INFO L225 Difference]: With dead ends: 42 [2020-12-23 17:36:06,865 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 17:36:06,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 17:36:06,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 17:36:06,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-12-23 17:36:06,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 17:36:06,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-12-23 17:36:06,870 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 23 [2020-12-23 17:36:06,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:06,870 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-12-23 17:36:06,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 17:36:06,870 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-12-23 17:36:06,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 17:36:06,871 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:06,871 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:36:07,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:36:07,086 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:07,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:07,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1533419909, now seen corresponding path program 2 times [2020-12-23 17:36:07,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:07,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579562474] [2020-12-23 17:36:07,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:07,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:36:07,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579562474] [2020-12-23 17:36:07,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696935665] [2020-12-23 17:36:07,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 17:36:07,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 17:36:07,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:36:07,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 17:36:07,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:36:07,291 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 17:36:07,292 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:36:07,298 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:36:07,298 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 17:36:07,300 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 17:36:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-23 17:36:07,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 17:36:07,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [9] total 10 [2020-12-23 17:36:07,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080391618] [2020-12-23 17:36:07,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:36:07,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:07,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:36:07,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-12-23 17:36:07,322 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 3 states. [2020-12-23 17:36:07,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:07,357 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-12-23 17:36:07,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:36:07,357 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-12-23 17:36:07,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:07,360 INFO L225 Difference]: With dead ends: 43 [2020-12-23 17:36:07,360 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 17:36:07,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-12-23 17:36:07,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 17:36:07,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-12-23 17:36:07,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 17:36:07,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-12-23 17:36:07,365 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 26 [2020-12-23 17:36:07,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:07,366 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-12-23 17:36:07,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:36:07,366 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-12-23 17:36:07,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 17:36:07,367 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:07,367 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:36:07,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 17:36:07,583 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:07,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:07,584 INFO L82 PathProgramCache]: Analyzing trace with hash -281744994, now seen corresponding path program 1 times [2020-12-23 17:36:07,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:07,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662787481] [2020-12-23 17:36:07,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:07,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:07,681 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 17:36:07,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662787481] [2020-12-23 17:36:07,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766644531] [2020-12-23 17:36:07,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 17:36:07,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:07,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 17:36:07,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:36:07,783 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 17:36:07,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:36:07,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 17:36:07,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534589860] [2020-12-23 17:36:07,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 17:36:07,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:07,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 17:36:07,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 17:36:07,786 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 10 states. [2020-12-23 17:36:07,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:07,827 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-12-23 17:36:07,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 17:36:07,829 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-12-23 17:36:07,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:07,830 INFO L225 Difference]: With dead ends: 46 [2020-12-23 17:36:07,830 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 17:36:07,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 17:36:07,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 17:36:07,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-12-23 17:36:07,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 17:36:07,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-12-23 17:36:07,834 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 30 [2020-12-23 17:36:07,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:07,835 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-12-23 17:36:07,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 17:36:07,835 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-12-23 17:36:07,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 17:36:07,836 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:07,836 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:36:08,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 17:36:08,050 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:08,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:08,051 INFO L82 PathProgramCache]: Analyzing trace with hash 425603622, now seen corresponding path program 2 times [2020-12-23 17:36:08,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:08,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454625490] [2020-12-23 17:36:08,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:08,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:08,138 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 17:36:08,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454625490] [2020-12-23 17:36:08,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249699099] [2020-12-23 17:36:08,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 17:36:08,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 17:36:08,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:36:08,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 17:36:08,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:36:08,286 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 17:36:08,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:36:08,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 17:36:08,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882635572] [2020-12-23 17:36:08,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 17:36:08,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:08,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 17:36:08,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 17:36:08,290 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 11 states. [2020-12-23 17:36:08,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:08,342 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-12-23 17:36:08,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 17:36:08,342 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-12-23 17:36:08,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:08,343 INFO L225 Difference]: With dead ends: 49 [2020-12-23 17:36:08,343 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 17:36:08,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 17:36:08,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 17:36:08,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-12-23 17:36:08,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 17:36:08,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-12-23 17:36:08,347 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 33 [2020-12-23 17:36:08,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:08,348 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-12-23 17:36:08,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 17:36:08,348 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-12-23 17:36:08,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 17:36:08,349 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:08,349 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:36:08,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:36:08,555 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:08,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:08,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1938668702, now seen corresponding path program 3 times [2020-12-23 17:36:08,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:08,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381554997] [2020-12-23 17:36:08,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:08,652 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 17:36:08,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381554997] [2020-12-23 17:36:08,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310762651] [2020-12-23 17:36:08,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 17:36:08,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 17:36:08,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:36:08,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 17:36:08,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:36:08,739 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 17:36:08,739 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:36:08,744 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:36:08,745 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 17:36:08,746 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-23 17:36:08,915 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:36:08,916 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 38 [2020-12-23 17:36:08,919 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:36:08,947 INFO L625 ElimStorePlain]: treesize reduction 14, result has 65.0 percent of original size [2020-12-23 17:36:08,949 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. [2020-12-23 17:36:08,949 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:26 [2020-12-23 17:36:09,041 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-23 17:36:09,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:36:09,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2020-12-23 17:36:09,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240958673] [2020-12-23 17:36:09,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 17:36:09,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:09,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 17:36:09,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-12-23 17:36:09,043 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 18 states. [2020-12-23 17:36:09,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:09,807 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-12-23 17:36:09,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 17:36:09,808 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2020-12-23 17:36:09,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:09,809 INFO L225 Difference]: With dead ends: 61 [2020-12-23 17:36:09,809 INFO L226 Difference]: Without dead ends: 61 [2020-12-23 17:36:09,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=263, Invalid=729, Unknown=0, NotChecked=0, Total=992 [2020-12-23 17:36:09,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-23 17:36:09,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-12-23 17:36:09,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 17:36:09,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-12-23 17:36:09,814 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 36 [2020-12-23 17:36:09,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:09,814 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-12-23 17:36:09,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 17:36:09,815 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-12-23 17:36:09,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 17:36:09,816 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:09,816 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:36:10,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:36:10,031 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:10,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:10,032 INFO L82 PathProgramCache]: Analyzing trace with hash -20077561, now seen corresponding path program 1 times [2020-12-23 17:36:10,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:10,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980575404] [2020-12-23 17:36:10,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:10,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:10,142 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 17:36:10,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980575404] [2020-12-23 17:36:10,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064395813] [2020-12-23 17:36:10,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 17:36:10,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:10,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 17:36:10,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:36:10,271 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 17:36:10,272 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:36:10,277 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:36:10,278 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 17:36:10,278 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 17:36:10,302 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 17:36:10,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:36:10,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2020-12-23 17:36:10,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087238719] [2020-12-23 17:36:10,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 17:36:10,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:10,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 17:36:10,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 17:36:10,304 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 4 states. [2020-12-23 17:36:10,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:10,340 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2020-12-23 17:36:10,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 17:36:10,341 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-12-23 17:36:10,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:10,342 INFO L225 Difference]: With dead ends: 60 [2020-12-23 17:36:10,342 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 17:36:10,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 17:36:10,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 17:36:10,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-12-23 17:36:10,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 17:36:10,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-12-23 17:36:10,347 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 43 [2020-12-23 17:36:10,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:10,347 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-12-23 17:36:10,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 17:36:10,347 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-12-23 17:36:10,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 17:36:10,348 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:10,348 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 17:36:10,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 17:36:10,562 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:10,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:10,563 INFO L82 PathProgramCache]: Analyzing trace with hash -676132566, now seen corresponding path program 4 times [2020-12-23 17:36:10,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:10,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509775012] [2020-12-23 17:36:10,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:10,723 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-23 17:36:10,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509775012] [2020-12-23 17:36:10,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664192741] [2020-12-23 17:36:10,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 17:36:10,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 17:36:10,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:36:10,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 17:36:10,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:36:10,829 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 17:36:10,829 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:36:10,833 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:36:10,834 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 17:36:10,834 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-23 17:36:10,942 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:36:10,943 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 28 [2020-12-23 17:36:10,946 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:36:10,967 INFO L625 ElimStorePlain]: treesize reduction 14, result has 54.8 percent of original size [2020-12-23 17:36:10,969 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. [2020-12-23 17:36:10,969 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:17 [2020-12-23 17:36:11,075 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 17:36:11,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:36:11,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-23 17:36:11,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720748285] [2020-12-23 17:36:11,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 17:36:11,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:11,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 17:36:11,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-12-23 17:36:11,077 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 13 states. [2020-12-23 17:36:11,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:11,331 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2020-12-23 17:36:11,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 17:36:11,332 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-12-23 17:36:11,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:11,333 INFO L225 Difference]: With dead ends: 66 [2020-12-23 17:36:11,333 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 17:36:11,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-12-23 17:36:11,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 17:36:11,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2020-12-23 17:36:11,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 17:36:11,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-12-23 17:36:11,340 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 47 [2020-12-23 17:36:11,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:11,340 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-12-23 17:36:11,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 17:36:11,341 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-12-23 17:36:11,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 17:36:11,341 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:11,342 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 17:36:11,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 17:36:11,553 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:11,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:11,554 INFO L82 PathProgramCache]: Analyzing trace with hash 514726907, now seen corresponding path program 2 times [2020-12-23 17:36:11,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:11,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202323141] [2020-12-23 17:36:11,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:11,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:11,631 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 17:36:11,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202323141] [2020-12-23 17:36:11,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65891899] [2020-12-23 17:36:11,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 17:36:11,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 17:36:11,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:36:11,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 17:36:11,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:36:11,733 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 17:36:11,733 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:36:11,739 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:36:11,740 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 17:36:11,740 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 17:36:11,847 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2020-12-23 17:36:11,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:36:11,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2020-12-23 17:36:11,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104388966] [2020-12-23 17:36:11,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 17:36:11,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:11,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 17:36:11,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-12-23 17:36:11,849 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 10 states. [2020-12-23 17:36:12,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:12,112 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-12-23 17:36:12,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 17:36:12,113 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2020-12-23 17:36:12,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:12,114 INFO L225 Difference]: With dead ends: 67 [2020-12-23 17:36:12,114 INFO L226 Difference]: Without dead ends: 67 [2020-12-23 17:36:12,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-12-23 17:36:12,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-23 17:36:12,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-12-23 17:36:12,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 17:36:12,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-12-23 17:36:12,119 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 48 [2020-12-23 17:36:12,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:12,119 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-12-23 17:36:12,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 17:36:12,120 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-12-23 17:36:12,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 17:36:12,120 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:12,120 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 17:36:12,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 17:36:12,335 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:12,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:12,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1578211554, now seen corresponding path program 5 times [2020-12-23 17:36:12,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:12,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939265910] [2020-12-23 17:36:12,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:12,532 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-23 17:36:12,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939265910] [2020-12-23 17:36:12,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311071780] [2020-12-23 17:36:12,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 17:36:12,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-23 17:36:12,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:36:12,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 17:36:12,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:36:12,714 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 17:36:12,715 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:36:12,719 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:36:12,720 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 17:36:12,720 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-23 17:36:12,802 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:36:12,802 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 28 [2020-12-23 17:36:12,807 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:36:12,829 INFO L625 ElimStorePlain]: treesize reduction 14, result has 58.8 percent of original size [2020-12-23 17:36:12,830 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. [2020-12-23 17:36:12,830 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:20 [2020-12-23 17:36:12,956 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 17:36:12,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:36:12,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-12-23 17:36:12,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416364825] [2020-12-23 17:36:12,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 17:36:12,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:12,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 17:36:12,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-12-23 17:36:12,960 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 13 states. [2020-12-23 17:36:13,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:13,245 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2020-12-23 17:36:13,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 17:36:13,245 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-12-23 17:36:13,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:13,246 INFO L225 Difference]: With dead ends: 69 [2020-12-23 17:36:13,246 INFO L226 Difference]: Without dead ends: 69 [2020-12-23 17:36:13,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-12-23 17:36:13,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-23 17:36:13,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2020-12-23 17:36:13,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 17:36:13,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-12-23 17:36:13,252 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 52 [2020-12-23 17:36:13,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:13,254 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-12-23 17:36:13,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 17:36:13,254 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-12-23 17:36:13,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 17:36:13,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:13,260 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 17:36:13,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:36:13,476 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:13,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:13,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1470341546, now seen corresponding path program 6 times [2020-12-23 17:36:13,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:13,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538650962] [2020-12-23 17:36:13,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:13,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:13,665 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 19 proven. 38 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-23 17:36:13,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538650962] [2020-12-23 17:36:13,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240714488] [2020-12-23 17:36:13,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 17:36:13,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 17:36:13,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:36:13,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 17:36:13,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:36:13,717 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 17:36:13,718 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:36:13,723 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:36:13,723 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 17:36:13,724 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-23 17:36:13,862 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:36:13,862 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 28 [2020-12-23 17:36:13,866 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:36:13,882 INFO L625 ElimStorePlain]: treesize reduction 14, result has 50.0 percent of original size [2020-12-23 17:36:13,883 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. [2020-12-23 17:36:13,883 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:14 [2020-12-23 17:36:14,042 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2020-12-23 17:36:14,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 17:36:14,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 14 [2020-12-23 17:36:14,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346499318] [2020-12-23 17:36:14,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 17:36:14,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:14,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 17:36:14,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-12-23 17:36:14,044 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 8 states. [2020-12-23 17:36:14,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:14,192 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2020-12-23 17:36:14,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 17:36:14,193 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-12-23 17:36:14,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:14,193 INFO L225 Difference]: With dead ends: 65 [2020-12-23 17:36:14,194 INFO L226 Difference]: Without dead ends: 65 [2020-12-23 17:36:14,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-12-23 17:36:14,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-23 17:36:14,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-12-23 17:36:14,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 17:36:14,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-12-23 17:36:14,197 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 57 [2020-12-23 17:36:14,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:14,197 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-12-23 17:36:14,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 17:36:14,198 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-12-23 17:36:14,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 17:36:14,198 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:14,198 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:36:14,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 17:36:14,412 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:14,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:14,413 INFO L82 PathProgramCache]: Analyzing trace with hash -46063240, now seen corresponding path program 1 times [2020-12-23 17:36:14,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:14,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184404993] [2020-12-23 17:36:14,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:14,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:14,501 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 17:36:14,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184404993] [2020-12-23 17:36:14,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47623575] [2020-12-23 17:36:14,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 17:36:14,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:14,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 17:36:14,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:36:14,647 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 17:36:14,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:36:14,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 17:36:14,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763220999] [2020-12-23 17:36:14,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 17:36:14,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:14,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 17:36:14,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:36:14,650 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 8 states. [2020-12-23 17:36:14,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:14,698 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-12-23 17:36:14,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 17:36:14,698 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-12-23 17:36:14,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:14,699 INFO L225 Difference]: With dead ends: 73 [2020-12-23 17:36:14,699 INFO L226 Difference]: Without dead ends: 73 [2020-12-23 17:36:14,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:36:14,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-23 17:36:14,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2020-12-23 17:36:14,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-23 17:36:14,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-12-23 17:36:14,703 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 59 [2020-12-23 17:36:14,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:14,704 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-12-23 17:36:14,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 17:36:14,704 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-12-23 17:36:14,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 17:36:14,707 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:14,708 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:36:14,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:36:14,922 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:14,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:14,922 INFO L82 PathProgramCache]: Analyzing trace with hash 893071724, now seen corresponding path program 2 times [2020-12-23 17:36:14,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:14,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539058385] [2020-12-23 17:36:14,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:14,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:15,009 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 17:36:15,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539058385] [2020-12-23 17:36:15,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049440202] [2020-12-23 17:36:15,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 17:36:15,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 17:36:15,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:36:15,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 17:36:15,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:36:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 17:36:15,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:36:15,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 17:36:15,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386707644] [2020-12-23 17:36:15,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 17:36:15,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:15,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 17:36:15,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 17:36:15,168 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 9 states. [2020-12-23 17:36:15,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:15,208 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2020-12-23 17:36:15,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 17:36:15,209 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 64 [2020-12-23 17:36:15,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:15,209 INFO L225 Difference]: With dead ends: 78 [2020-12-23 17:36:15,210 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 17:36:15,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 17:36:15,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 17:36:15,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2020-12-23 17:36:15,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-23 17:36:15,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-12-23 17:36:15,216 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 64 [2020-12-23 17:36:15,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:15,216 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-12-23 17:36:15,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 17:36:15,217 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-12-23 17:36:15,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 17:36:15,218 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:15,218 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:36:15,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:36:15,433 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:15,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:15,434 INFO L82 PathProgramCache]: Analyzing trace with hash 579926520, now seen corresponding path program 3 times [2020-12-23 17:36:15,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:15,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424627149] [2020-12-23 17:36:15,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:15,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:15,511 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 17:36:15,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424627149] [2020-12-23 17:36:15,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972581593] [2020-12-23 17:36:15,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 17:36:15,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 17:36:15,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:36:15,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 17:36:15,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:36:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 17:36:15,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:36:15,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 17:36:15,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375525798] [2020-12-23 17:36:15,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 17:36:15,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:15,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 17:36:15,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 17:36:15,747 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 10 states. [2020-12-23 17:36:15,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:15,804 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2020-12-23 17:36:15,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 17:36:15,804 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-12-23 17:36:15,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:15,805 INFO L225 Difference]: With dead ends: 83 [2020-12-23 17:36:15,805 INFO L226 Difference]: Without dead ends: 83 [2020-12-23 17:36:15,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 17:36:15,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-23 17:36:15,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2020-12-23 17:36:15,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 17:36:15,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-12-23 17:36:15,808 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 69 [2020-12-23 17:36:15,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:15,809 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-12-23 17:36:15,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 17:36:15,809 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-12-23 17:36:15,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-23 17:36:15,810 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:15,810 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:36:16,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 17:36:16,024 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:16,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:16,025 INFO L82 PathProgramCache]: Analyzing trace with hash 2055121132, now seen corresponding path program 4 times [2020-12-23 17:36:16,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:16,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415687993] [2020-12-23 17:36:16,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:16,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:16,113 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 17:36:16,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415687993] [2020-12-23 17:36:16,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181843338] [2020-12-23 17:36:16,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 17:36:16,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 17:36:16,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:36:16,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 17:36:16,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:36:16,583 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 17:36:16,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:36:16,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 17:36:16,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407315029] [2020-12-23 17:36:16,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 17:36:16,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:16,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 17:36:16,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 17:36:16,585 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 11 states. [2020-12-23 17:36:16,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:16,645 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-12-23 17:36:16,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 17:36:16,646 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 74 [2020-12-23 17:36:16,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:16,646 INFO L225 Difference]: With dead ends: 88 [2020-12-23 17:36:16,647 INFO L226 Difference]: Without dead ends: 88 [2020-12-23 17:36:16,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 17:36:16,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-23 17:36:16,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-12-23 17:36:16,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-23 17:36:16,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-12-23 17:36:16,650 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 74 [2020-12-23 17:36:16,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:16,650 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-12-23 17:36:16,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 17:36:16,650 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-12-23 17:36:16,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-23 17:36:16,651 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:16,651 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:36:16,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:36:16,866 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:16,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:16,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1706282376, now seen corresponding path program 5 times [2020-12-23 17:36:16,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:16,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157384144] [2020-12-23 17:36:16,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:16,979 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 17:36:16,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157384144] [2020-12-23 17:36:16,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498039953] [2020-12-23 17:36:16,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 17:36:17,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-23 17:36:17,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:36:17,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 17:36:17,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:36:17,876 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 17:36:17,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:36:17,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 17:36:17,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816955511] [2020-12-23 17:36:17,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 17:36:17,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:17,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 17:36:17,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 17:36:17,878 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 12 states. [2020-12-23 17:36:17,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:17,944 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2020-12-23 17:36:17,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 17:36:17,945 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2020-12-23 17:36:17,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:17,947 INFO L225 Difference]: With dead ends: 93 [2020-12-23 17:36:17,947 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 17:36:17,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 17:36:17,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 17:36:17,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2020-12-23 17:36:17,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-23 17:36:17,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2020-12-23 17:36:17,949 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 79 [2020-12-23 17:36:17,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:17,950 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2020-12-23 17:36:17,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 17:36:17,950 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2020-12-23 17:36:17,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-23 17:36:17,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:17,951 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:36:18,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 17:36:18,165 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:18,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:18,166 INFO L82 PathProgramCache]: Analyzing trace with hash 158515308, now seen corresponding path program 6 times [2020-12-23 17:36:18,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:18,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441945554] [2020-12-23 17:36:18,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:18,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:36:18,283 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 17:36:18,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441945554] [2020-12-23 17:36:18,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629721421] [2020-12-23 17:36:18,284 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 17:36:19,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-23 17:36:19,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:36:19,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 17:36:19,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:36:19,348 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 17:36:19,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:36:19,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 17:36:19,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402283311] [2020-12-23 17:36:19,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 17:36:19,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:36:19,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 17:36:19,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 17:36:19,350 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 13 states. [2020-12-23 17:36:19,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:36:19,424 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-12-23 17:36:19,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 17:36:19,425 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 84 [2020-12-23 17:36:19,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:36:19,426 INFO L225 Difference]: With dead ends: 94 [2020-12-23 17:36:19,426 INFO L226 Difference]: Without dead ends: 94 [2020-12-23 17:36:19,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 17:36:19,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-23 17:36:19,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-12-23 17:36:19,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-23 17:36:19,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2020-12-23 17:36:19,429 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 84 [2020-12-23 17:36:19,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:36:19,429 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2020-12-23 17:36:19,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 17:36:19,429 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2020-12-23 17:36:19,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-23 17:36:19,430 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:36:19,430 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:36:19,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 17:36:19,645 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:36:19,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:36:19,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1572522744, now seen corresponding path program 7 times [2020-12-23 17:36:19,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:36:19,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194192015] [2020-12-23 17:36:19,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:36:19,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 17:36:19,699 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 17:36:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 17:36:19,746 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 17:36:19,777 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 17:36:19,778 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 17:36:19,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-23 17:36:19,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 05:36:19 BoogieIcfgContainer [2020-12-23 17:36:19,842 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 17:36:19,843 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 17:36:19,843 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 17:36:19,843 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 17:36:19,843 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:36:02" (3/4) ... [2020-12-23 17:36:19,845 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-23 17:36:19,928 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/memsafety-ext3/getNumbers2.c-witness.graphml [2020-12-23 17:36:19,928 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 17:36:19,930 INFO L168 Benchmark]: Toolchain (without parser) took 18277.06 ms. Allocated memory was 151.0 MB in the beginning and 274.7 MB in the end (delta: 123.7 MB). Free memory was 126.8 MB in the beginning and 176.4 MB in the end (delta: -49.6 MB). Peak memory consumption was 74.8 MB. Max. memory is 8.0 GB. [2020-12-23 17:36:19,930 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 124.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 17:36:19,930 INFO L168 Benchmark]: CACSL2BoogieTranslator took 351.65 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 117.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 17:36:19,931 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.66 ms. Allocated memory is still 151.0 MB. Free memory was 117.1 MB in the beginning and 115.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 17:36:19,931 INFO L168 Benchmark]: Boogie Preprocessor took 53.45 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 114.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 17:36:19,931 INFO L168 Benchmark]: RCFGBuilder took 394.95 ms. Allocated memory is still 151.0 MB. Free memory was 114.5 MB in the beginning and 99.7 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-12-23 17:36:19,932 INFO L168 Benchmark]: TraceAbstraction took 17330.63 ms. Allocated memory was 151.0 MB in the beginning and 274.7 MB in the end (delta: 123.7 MB). Free memory was 99.2 MB in the beginning and 181.1 MB in the end (delta: -81.9 MB). Peak memory consumption was 43.4 MB. Max. memory is 8.0 GB. [2020-12-23 17:36:19,932 INFO L168 Benchmark]: Witness Printer took 86.03 ms. Allocated memory is still 274.7 MB. Free memory was 180.6 MB in the beginning and 176.4 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2020-12-23 17:36:19,938 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 124.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 351.65 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 117.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 46.66 ms. Allocated memory is still 151.0 MB. Free memory was 117.1 MB in the beginning and 115.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 53.45 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 114.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 394.95 ms. Allocated memory is still 151.0 MB. Free memory was 114.5 MB in the beginning and 99.7 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 17330.63 ms. Allocated memory was 151.0 MB in the beginning and 274.7 MB in the end (delta: 123.7 MB). Free memory was 99.2 MB in the beginning and 181.1 MB in the end (delta: -81.9 MB). Peak memory consumption was 43.4 MB. Max. memory is 8.0 GB. * Witness Printer took 86.03 ms. Allocated memory is still 274.7 MB. Free memory was 180.6 MB in the beginning and 176.4 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 26]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L1] int array[10]; VAL [array={11:0}] [L5] int i = 0; VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i VAL [array={11:0}] [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i VAL [array={11:0}] [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i VAL [array={11:0}] [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i VAL [array={11:0}] [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i VAL [array={11:0}] [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i VAL [array={11:0}] [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i VAL [array={11:0}] [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i VAL [array={11:0}] [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i VAL [array={11:0}] [L5] ++i VAL [array={11:0}] [L5] COND TRUE i < 10 VAL [array={11:0}] [L6] array[i] = i VAL [array={11:0}] [L5] ++i VAL [array={11:0}] [L5] COND FALSE !(i < 10) VAL [array={11:0}] [L9] return array; VAL [array={11:0}] [L13] int* numbers = getNumbers(); [L15] int numbers2[10]; [L17] int i = 0; VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] VAL [array={11:0}] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] VAL [array={11:0}] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] VAL [array={11:0}] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] VAL [array={11:0}] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] VAL [array={11:0}] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] VAL [array={11:0}] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] VAL [array={11:0}] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] VAL [array={11:0}] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] VAL [array={11:0}] [L17] ++i VAL [array={11:0}] [L17] COND TRUE i < 10 VAL [array={11:0}] [L18] EXPR numbers[i] VAL [array={11:0}] [L18] numbers2[i] = numbers[i] VAL [array={11:0}] [L17] ++i VAL [array={11:0}] [L17] COND FALSE !(i < 10) VAL [array={11:0}] [L21] return numbers2; [L21] return numbers2; VAL [array={11:0}] [L25] int *numbers = getNumbers2(); [L26] numbers[0] = 100 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 9 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 17.1s, OverallIterations: 25, TraceHistogramMax: 10, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 400 SDtfs, 920 SDslu, 1401 SDs, 0 SdLazy, 1217 SolverSat, 137 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1099 GetRequests, 868 SyntacticMatches, 6 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 24 MinimizatonAttempts, 55 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 3.0s SatisfiabilityAnalysisTime, 4.9s InterpolantComputationTime, 1934 NumberOfCodeBlocks, 1777 NumberOfCodeBlocksAsserted, 89 NumberOfCheckSat, 1800 ConstructedInterpolants, 2 QuantifiedInterpolants, 424007 SizeOfPredicates, 32 NumberOfNonLiveVariables, 2554 ConjunctsInSsa, 208 ConjunctsInUnsatCore, 45 InterpolantComputations, 7 PerfectInterpolantSequences, 3482/5423 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...