/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-scaling/prodbin-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 08:02:57,803 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 08:02:57,808 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 08:02:57,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 08:02:57,868 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 08:02:57,872 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 08:02:57,876 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 08:02:57,882 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 08:02:57,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 08:02:57,906 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 08:02:57,912 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 08:02:57,914 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 08:02:57,914 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 08:02:57,917 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 08:02:57,919 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 08:02:57,921 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 08:02:57,922 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 08:02:57,926 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 08:02:57,942 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 08:02:57,950 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 08:02:57,954 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 08:02:57,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 08:02:57,958 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 08:02:57,961 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 08:02:57,969 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 08:02:57,970 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 08:02:57,970 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 08:02:57,972 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 08:02:57,973 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 08:02:57,974 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 08:02:57,975 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 08:02:57,976 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 08:02:57,978 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 08:02:57,979 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 08:02:57,981 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 08:02:57,981 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 08:02:57,982 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 08:02:57,990 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 08:02:57,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 08:02:57,992 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 08:02:57,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 08:02:57,994 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 08:02:58,038 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 08:02:58,039 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 08:02:58,042 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 08:02:58,043 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 08:02:58,043 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 08:02:58,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 08:02:58,043 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 08:02:58,043 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 08:02:58,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 08:02:58,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 08:02:58,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 08:02:58,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 08:02:58,045 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 08:02:58,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 08:02:58,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 08:02:58,046 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 08:02:58,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 08:02:58,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 08:02:58,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 08:02:58,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 08:02:58,047 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 08:02:58,047 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 08:02:58,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 08:02:58,048 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 08:02:58,048 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 08:02:58,048 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 08:02:58,420 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 08:02:58,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 08:02:58,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 08:02:58,450 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 08:02:58,451 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 08:02:58,452 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound100.c [2020-12-23 08:02:58,528 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2c800b5a2/60a582d533d2466e8c523d6fab715028/FLAGe2d357864 [2020-12-23 08:02:59,127 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 08:02:59,128 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound100.c [2020-12-23 08:02:59,136 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2c800b5a2/60a582d533d2466e8c523d6fab715028/FLAGe2d357864 [2020-12-23 08:02:59,487 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2c800b5a2/60a582d533d2466e8c523d6fab715028 [2020-12-23 08:02:59,490 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 08:02:59,492 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 08:02:59,494 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 08:02:59,494 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 08:02:59,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 08:02:59,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 08:02:59" (1/1) ... [2020-12-23 08:02:59,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73b37025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:02:59, skipping insertion in model container [2020-12-23 08:02:59,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 08:02:59" (1/1) ... [2020-12-23 08:02:59,514 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 08:02:59,533 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 08:02:59,692 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-scaling/prodbin-ll_unwindbound100.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 08:02:59,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 08:02:59,723 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 08:02:59,739 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-scaling/prodbin-ll_unwindbound100.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 08:02:59,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 08:02:59,763 INFO L208 MainTranslator]: Completed translation [2020-12-23 08:02:59,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:02:59 WrapperNode [2020-12-23 08:02:59,764 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 08:02:59,765 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 08:02:59,765 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 08:02:59,765 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 08:02:59,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:02:59" (1/1) ... [2020-12-23 08:02:59,783 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:02:59" (1/1) ... [2020-12-23 08:02:59,806 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 08:02:59,807 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 08:02:59,807 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 08:02:59,807 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 08:02:59,818 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:02:59" (1/1) ... [2020-12-23 08:02:59,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:02:59" (1/1) ... [2020-12-23 08:02:59,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:02:59" (1/1) ... [2020-12-23 08:02:59,820 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:02:59" (1/1) ... [2020-12-23 08:02:59,824 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:02:59" (1/1) ... [2020-12-23 08:02:59,829 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:02:59" (1/1) ... [2020-12-23 08:02:59,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:02:59" (1/1) ... [2020-12-23 08:02:59,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 08:02:59,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 08:02:59,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 08:02:59,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 08:02:59,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:02:59" (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 08:02:59,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 08:02:59,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 08:02:59,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 08:02:59,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 08:03:00,368 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 08:03:00,369 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-23 08:03:00,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:03:00 BoogieIcfgContainer [2020-12-23 08:03:00,370 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 08:03:00,372 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 08:03:00,372 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 08:03:00,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 08:03:00,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 08:02:59" (1/3) ... [2020-12-23 08:03:00,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e542084 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 08:03:00, skipping insertion in model container [2020-12-23 08:03:00,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:02:59" (2/3) ... [2020-12-23 08:03:00,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e542084 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 08:03:00, skipping insertion in model container [2020-12-23 08:03:00,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:03:00" (3/3) ... [2020-12-23 08:03:00,380 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound100.c [2020-12-23 08:03:00,388 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 08:03:00,395 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 08:03:00,420 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 08:03:00,451 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 08:03:00,451 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 08:03:00,451 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 08:03:00,452 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 08:03:00,452 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 08:03:00,452 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 08:03:00,452 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 08:03:00,453 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 08:03:00,477 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-23 08:03:00,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 08:03:00,493 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:03:00,494 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:03:00,495 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:03:00,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:03:00,509 INFO L82 PathProgramCache]: Analyzing trace with hash 120336139, now seen corresponding path program 1 times [2020-12-23 08:03:00,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:03:00,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618327150] [2020-12-23 08:03:00,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:03:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:03:00,773 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 08:03:00,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618327150] [2020-12-23 08:03:00,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:03:00,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 08:03:00,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169004932] [2020-12-23 08:03:00,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 08:03:00,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:03:00,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 08:03:00,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 08:03:00,812 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-12-23 08:03:00,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:03:00,835 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2020-12-23 08:03:00,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 08:03:00,837 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-23 08:03:00,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:03:00,860 INFO L225 Difference]: With dead ends: 37 [2020-12-23 08:03:00,864 INFO L226 Difference]: Without dead ends: 16 [2020-12-23 08:03:00,869 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 08:03:00,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-23 08:03:00,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-23 08:03:00,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 08:03:00,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-12-23 08:03:00,913 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2020-12-23 08:03:00,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:03:00,914 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-12-23 08:03:00,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 08:03:00,914 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-12-23 08:03:00,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 08:03:00,915 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:03:00,915 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:03:00,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 08:03:00,917 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:03:00,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:03:00,921 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2020-12-23 08:03:00,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:03:00,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057070406] [2020-12-23 08:03:00,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:03:00,967 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:03:00,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [442245103] [2020-12-23 08:03:00,971 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 08:03:01,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:03:01,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 08:03:01,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:03:01,315 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 08:03:01,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057070406] [2020-12-23 08:03:01,316 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:03:01,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442245103] [2020-12-23 08:03:01,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:03:01,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 08:03:01,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274722863] [2020-12-23 08:03:01,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 08:03:01,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:03:01,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 08:03:01,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 08:03:01,321 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2020-12-23 08:03:01,512 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 14 [2020-12-23 08:03:01,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:03:01,689 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-12-23 08:03:01,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 08:03:01,690 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-23 08:03:01,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:03:01,691 INFO L225 Difference]: With dead ends: 36 [2020-12-23 08:03:01,691 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 08:03:01,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-23 08:03:01,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 08:03:01,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 20. [2020-12-23 08:03:01,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 08:03:01,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-12-23 08:03:01,700 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 8 [2020-12-23 08:03:01,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:03:01,700 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-12-23 08:03:01,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 08:03:01,700 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-12-23 08:03:01,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 08:03:01,701 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:03:01,701 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:03:01,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 08:03:01,914 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:03:01,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:03:01,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1182841223, now seen corresponding path program 1 times [2020-12-23 08:03:01,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:03:01,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130660290] [2020-12-23 08:03:01,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:03:01,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:03:01,988 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 08:03:01,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130660290] [2020-12-23 08:03:01,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:03:01,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 08:03:01,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508669172] [2020-12-23 08:03:01,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 08:03:01,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:03:01,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 08:03:01,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 08:03:01,991 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2020-12-23 08:03:02,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:03:02,012 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-12-23 08:03:02,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 08:03:02,013 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-23 08:03:02,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:03:02,014 INFO L225 Difference]: With dead ends: 24 [2020-12-23 08:03:02,014 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 08:03:02,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 08:03:02,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 08:03:02,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-23 08:03:02,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 08:03:02,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-12-23 08:03:02,020 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 9 [2020-12-23 08:03:02,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:03:02,020 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-12-23 08:03:02,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 08:03:02,021 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-12-23 08:03:02,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 08:03:02,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:03:02,022 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:03:02,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 08:03:02,022 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:03:02,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:03:02,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1117718140, now seen corresponding path program 1 times [2020-12-23 08:03:02,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:03:02,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730729287] [2020-12-23 08:03:02,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:03:02,039 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:03:02,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [4287908] [2020-12-23 08:03:02,039 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 08:03:02,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:03:02,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 08:03:02,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:03:02,577 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 08:03:02,637 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 08:03:02,680 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 08:03:04,771 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 08:03:04,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730729287] [2020-12-23 08:03:04,772 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:03:04,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4287908] [2020-12-23 08:03:04,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:03:04,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 08:03:04,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225581938] [2020-12-23 08:03:04,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 08:03:04,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:03:04,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 08:03:04,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 08:03:04,779 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 9 states. [2020-12-23 08:03:05,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:03:05,387 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-12-23 08:03:05,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 08:03:05,388 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-12-23 08:03:05,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:03:05,389 INFO L225 Difference]: With dead ends: 39 [2020-12-23 08:03:05,390 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 08:03:05,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2020-12-23 08:03:05,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 08:03:05,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 25. [2020-12-23 08:03:05,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 08:03:05,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-12-23 08:03:05,398 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 14 [2020-12-23 08:03:05,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:03:05,398 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-12-23 08:03:05,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 08:03:05,399 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-12-23 08:03:05,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 08:03:05,399 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:03:05,400 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:03:05,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:03:05,614 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:03:05,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:03:05,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1174976442, now seen corresponding path program 1 times [2020-12-23 08:03:05,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:03:05,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826599545] [2020-12-23 08:03:05,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:03:05,642 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:03:05,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [744155952] [2020-12-23 08:03:05,642 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 08:03:05,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:03:05,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 08:03:05,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:03:05,942 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 08:03:05,974 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 08:03:05,987 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 08:03:08,033 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 08:03:08,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826599545] [2020-12-23 08:03:08,033 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:03:08,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744155952] [2020-12-23 08:03:08,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:03:08,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 08:03:08,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648710336] [2020-12-23 08:03:08,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 08:03:08,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:03:08,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 08:03:08,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:03:08,036 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 8 states. [2020-12-23 08:03:09,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:03:09,983 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-12-23 08:03:09,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 08:03:09,984 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-12-23 08:03:09,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:03:09,986 INFO L225 Difference]: With dead ends: 46 [2020-12-23 08:03:09,986 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 08:03:09,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-12-23 08:03:09,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 08:03:09,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2020-12-23 08:03:09,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 08:03:09,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-12-23 08:03:09,999 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 14 [2020-12-23 08:03:09,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:03:09,999 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-12-23 08:03:10,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 08:03:10,000 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-12-23 08:03:10,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 08:03:10,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:03:10,001 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:03:10,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:03:10,215 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:03:10,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:03:10,216 INFO L82 PathProgramCache]: Analyzing trace with hash 289487287, now seen corresponding path program 1 times [2020-12-23 08:03:10,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:03:10,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331131270] [2020-12-23 08:03:10,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:03:10,234 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:03:10,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1030952346] [2020-12-23 08:03:10,235 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 08:03:10,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:03:10,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 08:03:10,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:03:10,342 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 08:03:10,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331131270] [2020-12-23 08:03:10,342 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:03:10,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030952346] [2020-12-23 08:03:10,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:03:10,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-23 08:03:10,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378488652] [2020-12-23 08:03:10,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 08:03:10,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:03:10,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 08:03:10,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 08:03:10,354 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2020-12-23 08:03:10,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:03:10,386 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-12-23 08:03:10,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 08:03:10,386 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-23 08:03:10,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:03:10,388 INFO L225 Difference]: With dead ends: 34 [2020-12-23 08:03:10,388 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 08:03:10,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 08:03:10,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 08:03:10,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-23 08:03:10,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 08:03:10,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-12-23 08:03:10,406 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 15 [2020-12-23 08:03:10,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:03:10,406 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-12-23 08:03:10,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 08:03:10,407 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-12-23 08:03:10,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 08:03:10,407 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:03:10,408 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:03:10,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:03:10,615 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:03:10,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:03:10,616 INFO L82 PathProgramCache]: Analyzing trace with hash -935436432, now seen corresponding path program 1 times [2020-12-23 08:03:10,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:03:10,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442927853] [2020-12-23 08:03:10,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:03:10,629 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:03:10,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100423115] [2020-12-23 08:03:10,629 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 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 08:03:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:03:10,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 08:03:10,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:03:11,659 WARN L197 SmtUtils]: Spent 859.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2020-12-23 08:03:11,679 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2020-12-23 08:03:11,679 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 08:03:11,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:03:11,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442927853] [2020-12-23 08:03:11,798 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:03:11,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100423115] [2020-12-23 08:03:11,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:03:11,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 08:03:11,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265497377] [2020-12-23 08:03:11,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 08:03:11,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:03:11,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 08:03:11,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 08:03:11,802 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 10 states. [2020-12-23 08:03:14,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:03:14,626 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-12-23 08:03:14,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 08:03:14,631 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-12-23 08:03:14,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:03:14,633 INFO L225 Difference]: With dead ends: 35 [2020-12-23 08:03:14,633 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 08:03:14,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2020-12-23 08:03:14,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 08:03:14,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2020-12-23 08:03:14,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 08:03:14,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-12-23 08:03:14,642 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2020-12-23 08:03:14,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:03:14,643 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-12-23 08:03:14,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 08:03:14,643 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-12-23 08:03:14,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 08:03:14,644 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:03:14,644 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 08:03:14,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 08:03:14,856 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:03:14,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:03:14,857 INFO L82 PathProgramCache]: Analyzing trace with hash -300473268, now seen corresponding path program 2 times [2020-12-23 08:03:14,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:03:14,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673898340] [2020-12-23 08:03:14,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:03:14,870 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:03:14,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1218312830] [2020-12-23 08:03:14,871 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 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 08:03:14,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:03:14,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:03:14,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 08:03:14,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:03:17,168 WARN L838 $PredicateComparison]: unable to prove that (and (= c_ULTIMATE.start_main_~x~0 (* 2 c_ULTIMATE.start_main_~a~0)) (= c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~z~0) (= c_ULTIMATE.start_main_~y~0 (div (+ c_ULTIMATE.start_main_~b~0 (- 1)) 2)) (<= 1 (mod c_ULTIMATE.start_main_~b~0 2)) (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 08:03:23,390 WARN L197 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 22 [2020-12-23 08:03:30,562 WARN L197 SmtUtils]: Spent 6.12 s on a formula simplification that was a NOOP. DAG size: 25 [2020-12-23 08:03:38,657 WARN L197 SmtUtils]: Spent 8.07 s on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2020-12-23 08:03:42,921 WARN L197 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2020-12-23 08:03:42,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673898340] [2020-12-23 08:03:42,940 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:03:42,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218312830] [2020-12-23 08:03:42,940 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-23 08:03:42,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:03:42,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-23 08:03:42,941 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-23 08:03:42,941 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 08:03:43,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:03:43,180 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-23 08:03:43,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 08:03:43 BoogieIcfgContainer [2020-12-23 08:03:43,181 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 08:03:43,181 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 08:03:43,182 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 08:03:43,182 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 08:03:43,182 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:03:00" (3/4) ... [2020-12-23 08:03:43,190 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 08:03:43,190 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 08:03:43,192 INFO L168 Benchmark]: Toolchain (without parser) took 43699.44 ms. Allocated memory was 176.2 MB in the beginning and 213.9 MB in the end (delta: 37.7 MB). Free memory was 157.4 MB in the beginning and 79.2 MB in the end (delta: 78.2 MB). Peak memory consumption was 115.6 MB. Max. memory is 8.0 GB. [2020-12-23 08:03:43,193 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 176.2 MB. Free memory was 147.7 MB in the beginning and 147.6 MB in the end (delta: 77.4 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 08:03:43,193 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.04 ms. Allocated memory is still 176.2 MB. Free memory was 157.2 MB in the beginning and 147.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 08:03:43,194 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.36 ms. Allocated memory is still 176.2 MB. Free memory was 147.3 MB in the beginning and 145.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 08:03:43,195 INFO L168 Benchmark]: Boogie Preprocessor took 25.31 ms. Allocated memory is still 176.2 MB. Free memory was 145.9 MB in the beginning and 144.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 08:03:43,196 INFO L168 Benchmark]: RCFGBuilder took 537.61 ms. Allocated memory is still 176.2 MB. Free memory was 144.6 MB in the beginning and 146.9 MB in the end (delta: -2.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. [2020-12-23 08:03:43,197 INFO L168 Benchmark]: TraceAbstraction took 42808.74 ms. Allocated memory was 176.2 MB in the beginning and 213.9 MB in the end (delta: 37.7 MB). Free memory was 146.7 MB in the beginning and 79.2 MB in the end (delta: 67.5 MB). Peak memory consumption was 106.0 MB. Max. memory is 8.0 GB. [2020-12-23 08:03:43,197 INFO L168 Benchmark]: Witness Printer took 8.96 ms. Allocated memory is still 213.9 MB. Free memory is still 79.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 08:03:43,202 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 176.2 MB. Free memory was 147.7 MB in the beginning and 147.6 MB in the end (delta: 77.4 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 270.04 ms. Allocated memory is still 176.2 MB. Free memory was 157.2 MB in the beginning and 147.3 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 41.36 ms. Allocated memory is still 176.2 MB. Free memory was 147.3 MB in the beginning and 145.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 25.31 ms. Allocated memory is still 176.2 MB. Free memory was 145.9 MB in the beginning and 144.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 537.61 ms. Allocated memory is still 176.2 MB. Free memory was 144.6 MB in the beginning and 146.9 MB in the end (delta: -2.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 42808.74 ms. Allocated memory was 176.2 MB in the beginning and 213.9 MB in the end (delta: 37.7 MB). Free memory was 146.7 MB in the beginning and 79.2 MB in the end (delta: 67.5 MB). Peak memory consumption was 106.0 MB. Max. memory is 8.0 GB. * Witness Printer took 8.96 ms. Allocated memory is still 213.9 MB. Free memory is still 79.2 MB. 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: [L20] int counter = 0; [L22] int a, b; [L23] long long x, y, z; [L25] a = __VERIFIER_nondet_int() [L26] b = __VERIFIER_nondet_int() [L10] COND FALSE !(!cond) [L29] x = a [L30] y = b [L31] z = 0 [L33] EXPR counter++ [L33] COND TRUE counter++<100 [L13] COND FALSE !(!(cond)) [L35] COND FALSE !(!(y != 0)) [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 [L42] x = 2 * x [L43] y = y / 2 [L33] EXPR counter++ [L33] COND TRUE counter++<100 [L13] COND FALSE !(!(cond)) [L35] COND FALSE !(!(y != 0)) [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 [L42] x = 2 * x [L43] y = y / 2 [L33] EXPR counter++ [L33] COND TRUE counter++<100 [L13] COND TRUE !(cond) [L15] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 42.7s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 5.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 97 SDtfs, 284 SDslu, 163 SDs, 0 SdLazy, 224 SolverSat, 65 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 4.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 95 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=5, 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, 7 MinimizatonAttempts, 38 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 6.4s InterpolantComputationTime, 85 NumberOfCodeBlocks, 85 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 78 ConstructedInterpolants, 1 QuantifiedInterpolants, 7714 SizeOfPredicates, 37 NumberOfNonLiveVariables, 406 ConjunctsInSsa, 105 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 0/12 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...