/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/nla-digbench/prodbin-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:20:33,168 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:20:33,170 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:20:33,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:20:33,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:20:33,208 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:20:33,210 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:20:33,222 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:20:33,224 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:20:33,225 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:20:33,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:20:33,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:20:33,228 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:20:33,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:20:33,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:20:33,232 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:20:33,233 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:20:33,234 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:20:33,236 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:20:33,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:20:33,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:20:33,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:20:33,245 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:20:33,246 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:20:33,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:20:33,252 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 07:20:33,253 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 07:20:33,254 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 07:20:33,255 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 07:20:33,256 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 07:20:33,256 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 07:20:33,257 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 07:20:33,257 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 07:20:33,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:20:33,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:20:33,259 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:20:33,263 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 07:20:33,289 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:20:33,290 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:20:33,291 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:20:33,291 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:20:33,291 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:20:33,292 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:20:33,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:20:33,292 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:20:33,292 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:20:33,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:20:33,293 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:20:33,293 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:20:33,293 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:20:33,293 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:20:33,294 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:20:33,294 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:20:33,294 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:20:33,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:20:33,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:20:33,295 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:20:33,295 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:20:33,295 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:20:33,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:20:33,295 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:20:33,296 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:20:33,296 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:20:33,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:20:33,695 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:20:33,698 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:20:33,700 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:20:33,700 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:20:33,701 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/prodbin-ll.c [2020-12-23 07:20:33,788 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2002c3e92/09707da69f70444a89d35f1632c81810/FLAGa6be4bf79 [2020-12-23 07:20:34,405 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:20:34,406 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench/prodbin-ll.c [2020-12-23 07:20:34,415 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2002c3e92/09707da69f70444a89d35f1632c81810/FLAGa6be4bf79 [2020-12-23 07:20:34,764 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2002c3e92/09707da69f70444a89d35f1632c81810 [2020-12-23 07:20:34,767 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:20:34,769 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:20:34,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:20:34,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:20:34,775 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:20:34,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:20:34" (1/1) ... [2020-12-23 07:20:34,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@414bbf6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:20:34, skipping insertion in model container [2020-12-23 07:20:34,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:20:34" (1/1) ... [2020-12-23 07:20:34,786 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:20:34,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:20:34,952 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench/prodbin-ll.c[537,550] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2020-12-23 07:20:34,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:20:34,978 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:20:34,993 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench/prodbin-ll.c[537,550] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2020-12-23 07:20:34,999 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:20:35,015 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:20:35,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:20:35 WrapperNode [2020-12-23 07:20:35,016 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:20:35,017 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:20:35,018 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:20:35,018 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:20:35,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:20:35" (1/1) ... [2020-12-23 07:20:35,034 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:20:35" (1/1) ... [2020-12-23 07:20:35,055 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:20:35,056 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:20:35,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:20:35,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:20:35,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:20:35" (1/1) ... [2020-12-23 07:20:35,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:20:35" (1/1) ... [2020-12-23 07:20:35,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:20:35" (1/1) ... [2020-12-23 07:20:35,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:20:35" (1/1) ... [2020-12-23 07:20:35,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:20:35" (1/1) ... [2020-12-23 07:20:35,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:20:35" (1/1) ... [2020-12-23 07:20:35,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:20:35" (1/1) ... [2020-12-23 07:20:35,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:20:35,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:20:35,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:20:35,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:20:35,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:20:35" (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 07:20:35,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:20:35,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:20:35,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:20:35,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:20:35,584 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:20:35,584 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-23 07:20:35,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:20:35 BoogieIcfgContainer [2020-12-23 07:20:35,586 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:20:35,588 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:20:35,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:20:35,592 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:20:35,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:20:34" (1/3) ... [2020-12-23 07:20:35,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37ca2ec6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:20:35, skipping insertion in model container [2020-12-23 07:20:35,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:20:35" (2/3) ... [2020-12-23 07:20:35,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37ca2ec6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:20:35, skipping insertion in model container [2020-12-23 07:20:35,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:20:35" (3/3) ... [2020-12-23 07:20:35,596 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll.c [2020-12-23 07:20:35,605 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:20:35,611 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 07:20:35,634 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 07:20:35,707 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:20:35,708 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:20:35,708 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:20:35,708 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:20:35,708 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:20:35,708 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:20:35,708 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:20:35,709 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:20:35,755 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-23 07:20:35,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 07:20:35,765 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:20:35,768 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:20:35,769 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:20:35,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:20:35,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1804972333, now seen corresponding path program 1 times [2020-12-23 07:20:35,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:20:35,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699433953] [2020-12-23 07:20:35,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:20:35,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:20:35,941 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 07:20:35,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699433953] [2020-12-23 07:20:35,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:20:35,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 07:20:35,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497648259] [2020-12-23 07:20:35,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 07:20:35,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:20:35,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 07:20:35,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:20:35,967 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-12-23 07:20:35,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:20:35,985 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2020-12-23 07:20:35,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 07:20:35,987 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-23 07:20:35,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:20:35,996 INFO L225 Difference]: With dead ends: 35 [2020-12-23 07:20:35,996 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 07:20:35,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:20:36,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 07:20:36,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-23 07:20:36,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 07:20:36,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-23 07:20:36,035 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 7 [2020-12-23 07:20:36,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:20:36,036 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-23 07:20:36,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 07:20:36,036 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-23 07:20:36,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 07:20:36,036 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:20:36,037 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:20:36,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:20:36,037 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:20:36,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:20:36,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1806819375, now seen corresponding path program 1 times [2020-12-23 07:20:36,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:20:36,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753868568] [2020-12-23 07:20:36,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:20:36,058 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:20:36,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1069242250] [2020-12-23 07:20:36,059 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 07:20:36,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:20:36,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 07:20:36,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:20:36,276 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 07:20:36,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753868568] [2020-12-23 07:20:36,277 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:20:36,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069242250] [2020-12-23 07:20:36,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:20:36,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 07:20:36,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746400927] [2020-12-23 07:20:36,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:20:36,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:20:36,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:20:36,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:20:36,282 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 6 states. [2020-12-23 07:20:36,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:20:36,522 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-12-23 07:20:36,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 07:20:36,523 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-12-23 07:20:36,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:20:36,524 INFO L225 Difference]: With dead ends: 28 [2020-12-23 07:20:36,524 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 07:20:36,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:20:36,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 07:20:36,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2020-12-23 07:20:36,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 07:20:36,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-23 07:20:36,531 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 7 [2020-12-23 07:20:36,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:20:36,531 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-23 07:20:36,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:20:36,531 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-23 07:20:36,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 07:20:36,532 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:20:36,532 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:20:36,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 07:20:36,747 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:20:36,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:20:36,749 INFO L82 PathProgramCache]: Analyzing trace with hash -464828708, now seen corresponding path program 1 times [2020-12-23 07:20:36,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:20:36,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855767468] [2020-12-23 07:20:36,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:20:36,765 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:20:36,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1242052535] [2020-12-23 07:20:36,766 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 07:20:36,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:20:36,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 07:20:36,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:20:37,125 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:20:37,175 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:20:37,213 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:20:39,284 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 07:20:39,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855767468] [2020-12-23 07:20:39,285 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:20:39,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242052535] [2020-12-23 07:20:39,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:20:39,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 07:20:39,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559980468] [2020-12-23 07:20:39,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:20:39,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:20:39,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:20:39,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:20:39,291 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-12-23 07:20:39,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:20:39,889 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-12-23 07:20:39,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:20:39,890 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-12-23 07:20:39,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:20:39,891 INFO L225 Difference]: With dead ends: 34 [2020-12-23 07:20:39,891 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 07:20:39,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:20:39,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 07:20:39,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 22. [2020-12-23 07:20:39,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 07:20:39,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-23 07:20:39,899 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 12 [2020-12-23 07:20:39,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:20:39,899 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-23 07:20:39,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:20:39,900 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-23 07:20:39,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 07:20:39,900 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:20:39,901 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:20:40,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:20:40,115 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:20:40,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:20:40,117 INFO L82 PathProgramCache]: Analyzing trace with hash -462981666, now seen corresponding path program 1 times [2020-12-23 07:20:40,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:20:40,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796791626] [2020-12-23 07:20:40,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:20:40,132 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:20:40,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1831164550] [2020-12-23 07:20:40,133 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 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 07:20:40,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:20:40,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 07:20:40,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:20:40,356 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:20:40,386 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:20:40,403 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:20:42,445 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 07:20:42,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796791626] [2020-12-23 07:20:42,448 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:20:42,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831164550] [2020-12-23 07:20:42,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:20:42,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 07:20:42,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557297367] [2020-12-23 07:20:42,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:20:42,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:20:42,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:20:42,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:20:42,453 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 8 states. [2020-12-23 07:20:43,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:20:43,402 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-12-23 07:20:43,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:20:43,402 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-12-23 07:20:43,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:20:43,403 INFO L225 Difference]: With dead ends: 36 [2020-12-23 07:20:43,403 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 07:20:43,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:20:43,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 07:20:43,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2020-12-23 07:20:43,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 07:20:43,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-12-23 07:20:43,411 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 12 [2020-12-23 07:20:43,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:20:43,412 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-12-23 07:20:43,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:20:43,412 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-12-23 07:20:43,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 07:20:43,413 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:20:43,413 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:20:43,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:20:43,617 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:20:43,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:20:43,618 INFO L82 PathProgramCache]: Analyzing trace with hash -732578001, now seen corresponding path program 1 times [2020-12-23 07:20:43,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:20:43,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622616280] [2020-12-23 07:20:43,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:20:43,634 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:20:43,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195168889] [2020-12-23 07:20:43,634 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 07:20:43,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:20:43,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 07:20:43,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:20:44,698 WARN L197 SmtUtils]: Spent 849.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2020-12-23 07:20:44,710 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2020-12-23 07:20:44,710 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:20:44,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:20:44,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622616280] [2020-12-23 07:20:44,803 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:20:44,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195168889] [2020-12-23 07:20:44,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:20:44,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 07:20:44,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815529447] [2020-12-23 07:20:44,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:20:44,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:20:44,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:20:44,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:20:44,808 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 10 states. [2020-12-23 07:20:47,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:20:47,666 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-12-23 07:20:47,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:20:47,667 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2020-12-23 07:20:47,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:20:47,668 INFO L225 Difference]: With dead ends: 27 [2020-12-23 07:20:47,668 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 07:20:47,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:20:47,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 07:20:47,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2020-12-23 07:20:47,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 07:20:47,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-12-23 07:20:47,673 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2020-12-23 07:20:47,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:20:47,673 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-12-23 07:20:47,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:20:47,674 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-12-23 07:20:47,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 07:20:47,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:20:47,674 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:20:47,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:20:47,888 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:20:47,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:20:47,889 INFO L82 PathProgramCache]: Analyzing trace with hash 416810063, now seen corresponding path program 2 times [2020-12-23 07:20:47,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:20:47,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684633519] [2020-12-23 07:20:47,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:20:47,904 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:20:47,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108334497] [2020-12-23 07:20:47,904 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 07:20:47,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:20:47,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:20:47,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 07:20:47,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:20:48,447 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:20:48,494 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:20:48,524 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 07:20:48,585 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:20:48,607 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 07:20:48,780 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:20:48,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:20:48,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684633519] [2020-12-23 07:20:48,811 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:20:48,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108334497] [2020-12-23 07:20:48,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:20:48,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-23 07:20:48,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075326953] [2020-12-23 07:20:48,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 07:20:48,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:20:48,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 07:20:48,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:20:48,821 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 13 states. [2020-12-23 07:20:49,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:20:49,933 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-12-23 07:20:49,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 07:20:49,934 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-12-23 07:20:49,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:20:49,935 INFO L225 Difference]: With dead ends: 34 [2020-12-23 07:20:49,935 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 07:20:49,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2020-12-23 07:20:49,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 07:20:49,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2020-12-23 07:20:49,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 07:20:49,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-12-23 07:20:49,941 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 17 [2020-12-23 07:20:49,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:20:49,942 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-12-23 07:20:49,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 07:20:49,942 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-12-23 07:20:49,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 07:20:49,943 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:20:49,943 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:20:50,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 07:20:50,154 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:20:50,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:20:50,155 INFO L82 PathProgramCache]: Analyzing trace with hash 418657105, now seen corresponding path program 1 times [2020-12-23 07:20:50,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:20:50,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379922149] [2020-12-23 07:20:50,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:20:50,171 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:20:50,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [475540775] [2020-12-23 07:20:50,172 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 07:20:50,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:20:50,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 07:20:50,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:20:50,340 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:20:50,355 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:20:52,441 WARN L838 $PredicateComparison]: unable to prove that (and (= c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~z~0) (< c_ULTIMATE.start_main_~b~0 (+ (* 2 c_ULTIMATE.start_main_~y~0) 3)) (<= 1 (mod c_ULTIMATE.start_main_~b~0 2)) (= c_ULTIMATE.start_main_~x~0 (* 2 c_ULTIMATE.start_main_~z~0)) (let ((.cse0 (= (+ c_ULTIMATE.start_main_~z~0 (* c_ULTIMATE.start_main_~x~0 c_ULTIMATE.start_main_~y~0)) (* c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~b~0)))) (or (and (= 1 c_ULTIMATE.start___VERIFIER_assert_~cond) .cse0) (and (= 0 c_ULTIMATE.start___VERIFIER_assert_~cond) (not .cse0)))) (<= 1 c_ULTIMATE.start_main_~b~0)) is different from false [2020-12-23 07:20:55,983 WARN L197 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 22 [2020-12-23 07:20:57,245 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2020-12-23 07:20:57,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379922149] [2020-12-23 07:20:57,253 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:20:57,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475540775] [2020-12-23 07:20:57,253 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-23 07:20:57,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:20:57,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-23 07:20:57,254 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-23 07:20:57,254 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 07:20:57,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:20:57,487 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-23 07:20:57,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 07:20:57 BoogieIcfgContainer [2020-12-23 07:20:57,488 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 07:20:57,488 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 07:20:57,488 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 07:20:57,489 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 07:20:57,489 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:20:35" (3/4) ... [2020-12-23 07:20:57,492 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 07:20:57,492 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 07:20:57,494 INFO L168 Benchmark]: Toolchain (without parser) took 22724.34 ms. Allocated memory was 165.7 MB in the beginning and 215.0 MB in the end (delta: 49.3 MB). Free memory was 140.5 MB in the beginning and 115.7 MB in the end (delta: 24.8 MB). Peak memory consumption was 74.7 MB. Max. memory is 8.0 GB. [2020-12-23 07:20:57,494 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 165.7 MB. Free memory is still 137.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:20:57,495 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.64 ms. Allocated memory is still 165.7 MB. Free memory was 140.3 MB in the beginning and 130.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 07:20:57,496 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.32 ms. Allocated memory is still 165.7 MB. Free memory was 130.4 MB in the beginning and 129.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:20:57,496 INFO L168 Benchmark]: Boogie Preprocessor took 22.85 ms. Allocated memory is still 165.7 MB. Free memory was 129.0 MB in the beginning and 127.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:20:57,497 INFO L168 Benchmark]: RCFGBuilder took 506.32 ms. Allocated memory is still 165.7 MB. Free memory was 127.9 MB in the beginning and 115.1 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-12-23 07:20:57,498 INFO L168 Benchmark]: TraceAbstraction took 21899.63 ms. Allocated memory was 165.7 MB in the beginning and 215.0 MB in the end (delta: 49.3 MB). Free memory was 114.7 MB in the beginning and 116.2 MB in the end (delta: -1.5 MB). Peak memory consumption was 48.5 MB. Max. memory is 8.0 GB. [2020-12-23 07:20:57,498 INFO L168 Benchmark]: Witness Printer took 4.31 ms. Allocated memory is still 215.0 MB. Free memory was 116.2 MB in the beginning and 115.7 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:20:57,502 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 165.7 MB. Free memory is still 137.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 245.64 ms. Allocated memory is still 165.7 MB. Free memory was 140.3 MB in the beginning and 130.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 38.32 ms. Allocated memory is still 165.7 MB. Free memory was 130.4 MB in the beginning and 129.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 22.85 ms. Allocated memory is still 165.7 MB. Free memory was 129.0 MB in the beginning and 127.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 506.32 ms. Allocated memory is still 165.7 MB. Free memory was 127.9 MB in the beginning and 115.1 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 21899.63 ms. Allocated memory was 165.7 MB in the beginning and 215.0 MB in the end (delta: 49.3 MB). Free memory was 114.7 MB in the beginning and 116.2 MB in the end (delta: -1.5 MB). Peak memory consumption was 48.5 MB. Max. memory is 8.0 GB. * Witness Printer took 4.31 ms. Allocated memory is still 215.0 MB. Free memory was 116.2 MB in the beginning and 115.7 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L21] int a, b; [L22] long long x, y, z; [L24] a = __VERIFIER_nondet_int() [L25] b = __VERIFIER_nondet_int() [L10] COND FALSE !(!cond) [L28] x = a [L29] y = b [L30] z = 0 [L32] COND TRUE 1 [L13] COND FALSE !(!(cond)) [L34] COND FALSE !(!(y != 0)) [L37] COND TRUE y % 2 == 1 [L38] z = z + x [L39] y = y - 1 [L41] x = 2 * x [L42] y = y / 2 [L32] COND TRUE 1 [L13] COND FALSE !(!(cond)) [L34] COND FALSE !(!(y != 0)) [L37] COND FALSE !(y % 2 == 1) [L41] x = 2 * x [L42] y = y / 2 [L32] COND TRUE 1 [L13] COND TRUE !(cond) [L15] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 21.7s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 5.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 50 SDtfs, 248 SDslu, 94 SDs, 0 SdLazy, 356 SolverSat, 70 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 3.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 95 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 32 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 6.7s InterpolantComputationTime, 70 NumberOfCodeBlocks, 70 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 64 ConstructedInterpolants, 1 QuantifiedInterpolants, 9926 SizeOfPredicates, 44 NumberOfNonLiveVariables, 367 ConjunctsInSsa, 137 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 0/16 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...