/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_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 08:03:03,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 08:03:03,517 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 08:03:03,553 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 08:03:03,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 08:03:03,555 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 08:03:03,556 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 08:03:03,559 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 08:03:03,561 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 08:03:03,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 08:03:03,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 08:03:03,564 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 08:03:03,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 08:03:03,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 08:03:03,567 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 08:03:03,569 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 08:03:03,570 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 08:03:03,571 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 08:03:03,579 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 08:03:03,597 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 08:03:03,599 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 08:03:03,601 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 08:03:03,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 08:03:03,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 08:03:03,620 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 08:03:03,630 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 08:03:03,631 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 08:03:03,633 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 08:03:03,634 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 08:03:03,635 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 08:03:03,635 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 08:03:03,636 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 08:03:03,636 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 08:03:03,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 08:03:03,638 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 08:03:03,639 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 08:03:03,640 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 08:03:03,669 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 08:03:03,669 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 08:03:03,670 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 08:03:03,671 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 08:03:03,671 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 08:03:03,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 08:03:03,671 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 08:03:03,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 08:03:03,672 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 08:03:03,672 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 08:03:03,672 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 08:03:03,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 08:03:03,672 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 08:03:03,673 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 08:03:03,673 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 08:03:03,673 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 08:03:03,673 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 08:03:03,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 08:03:03,674 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 08:03:03,674 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 08:03:03,674 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 08:03:03,674 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 08:03:03,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 08:03:03,675 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 08:03:03,675 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 08:03:03,675 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 08:03:04,065 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 08:03:04,094 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 08:03:04,098 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 08:03:04,099 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 08:03:04,102 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 08:03:04,103 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound20.c [2020-12-23 08:03:04,178 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dadee3d26/88e2b948a2f34295af64f21ef8d142b0/FLAGbc1a8ad7c [2020-12-23 08:03:04,648 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 08:03:04,649 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound20.c [2020-12-23 08:03:04,668 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dadee3d26/88e2b948a2f34295af64f21ef8d142b0/FLAGbc1a8ad7c [2020-12-23 08:03:05,030 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dadee3d26/88e2b948a2f34295af64f21ef8d142b0 [2020-12-23 08:03:05,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 08:03:05,035 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 08:03:05,036 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 08:03:05,036 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 08:03:05,040 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 08:03:05,041 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 08:03:05" (1/1) ... [2020-12-23 08:03:05,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@304a9eab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:03:05, skipping insertion in model container [2020-12-23 08:03:05,042 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 08:03:05" (1/1) ... [2020-12-23 08:03:05,050 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 08:03:05,066 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 08:03:05,231 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_unwindbound20.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 08:03:05,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 08:03:05,259 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 08:03:05,273 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_unwindbound20.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 08:03:05,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 08:03:05,296 INFO L208 MainTranslator]: Completed translation [2020-12-23 08:03:05,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:03:05 WrapperNode [2020-12-23 08:03:05,297 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 08:03:05,298 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 08:03:05,298 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 08:03:05,299 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 08:03:05,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:03:05" (1/1) ... [2020-12-23 08:03:05,314 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:03:05" (1/1) ... [2020-12-23 08:03:05,335 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 08:03:05,336 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 08:03:05,337 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 08:03:05,337 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 08:03:05,346 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:03:05" (1/1) ... [2020-12-23 08:03:05,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:03:05" (1/1) ... [2020-12-23 08:03:05,348 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:03:05" (1/1) ... [2020-12-23 08:03:05,367 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:03:05" (1/1) ... [2020-12-23 08:03:05,382 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:03:05" (1/1) ... [2020-12-23 08:03:05,401 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:03:05" (1/1) ... [2020-12-23 08:03:05,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:03:05" (1/1) ... [2020-12-23 08:03:05,413 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 08:03:05,414 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 08:03:05,414 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 08:03:05,415 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 08:03:05,416 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:03:05" (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 08:03:05,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 08:03:05,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 08:03:05,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 08:03:05,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 08:03:05,810 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 08:03:05,810 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-23 08:03:05,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:03:05 BoogieIcfgContainer [2020-12-23 08:03:05,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 08:03:05,814 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 08:03:05,814 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 08:03:05,817 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 08:03:05,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 08:03:05" (1/3) ... [2020-12-23 08:03:05,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@526ef6af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 08:03:05, skipping insertion in model container [2020-12-23 08:03:05,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:03:05" (2/3) ... [2020-12-23 08:03:05,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@526ef6af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 08:03:05, skipping insertion in model container [2020-12-23 08:03:05,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:03:05" (3/3) ... [2020-12-23 08:03:05,821 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound20.c [2020-12-23 08:03:05,830 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 08:03:05,835 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 08:03:05,863 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 08:03:05,923 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 08:03:05,924 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 08:03:05,924 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 08:03:05,924 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 08:03:05,924 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 08:03:05,924 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 08:03:05,925 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 08:03:05,925 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 08:03:05,958 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-23 08:03:05,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 08:03:05,969 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:03:05,970 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:03:05,970 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:03:05,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:03:05,977 INFO L82 PathProgramCache]: Analyzing trace with hash 120336139, now seen corresponding path program 1 times [2020-12-23 08:03:05,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:03:05,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813474731] [2020-12-23 08:03:05,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:03:06,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:03:06,146 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 08:03:06,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813474731] [2020-12-23 08:03:06,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:03:06,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 08:03:06,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295067873] [2020-12-23 08:03:06,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 08:03:06,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:03:06,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 08:03:06,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 08:03:06,170 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-12-23 08:03:06,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:03:06,187 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2020-12-23 08:03:06,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 08:03:06,189 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-23 08:03:06,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:03:06,198 INFO L225 Difference]: With dead ends: 37 [2020-12-23 08:03:06,199 INFO L226 Difference]: Without dead ends: 16 [2020-12-23 08:03:06,202 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 08:03:06,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-23 08:03:06,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-23 08:03:06,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 08:03:06,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-12-23 08:03:06,238 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2020-12-23 08:03:06,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:03:06,238 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-12-23 08:03:06,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 08:03:06,239 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-12-23 08:03:06,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 08:03:06,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:03:06,240 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:03:06,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 08:03:06,240 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:03:06,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:03:06,241 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2020-12-23 08:03:06,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:03:06,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055300215] [2020-12-23 08:03:06,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:03:06,261 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:03:06,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [540321510] [2020-12-23 08:03:06,262 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 08:03:06,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:03:06,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 08:03:06,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:03:06,481 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 08:03:06,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055300215] [2020-12-23 08:03:06,482 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:03:06,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540321510] [2020-12-23 08:03:06,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:03:06,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 08:03:06,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827697576] [2020-12-23 08:03:06,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 08:03:06,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:03:06,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 08:03:06,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 08:03:06,489 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2020-12-23 08:03:06,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:03:06,688 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-12-23 08:03:06,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 08:03:06,688 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-23 08:03:06,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:03:06,689 INFO L225 Difference]: With dead ends: 36 [2020-12-23 08:03:06,690 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 08:03:06,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-23 08:03:06,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 08:03:06,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 20. [2020-12-23 08:03:06,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 08:03:06,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-12-23 08:03:06,697 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 8 [2020-12-23 08:03:06,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:03:06,698 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-12-23 08:03:06,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 08:03:06,698 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-12-23 08:03:06,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 08:03:06,699 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:03:06,699 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:03:06,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 08:03:06,913 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:03:06,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:03:06,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1182841223, now seen corresponding path program 1 times [2020-12-23 08:03:06,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:03:06,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132968837] [2020-12-23 08:03:06,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:03:06,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:03:07,007 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 08:03:07,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132968837] [2020-12-23 08:03:07,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:03:07,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 08:03:07,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78049548] [2020-12-23 08:03:07,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 08:03:07,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:03:07,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 08:03:07,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 08:03:07,012 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2020-12-23 08:03:07,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:03:07,039 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-12-23 08:03:07,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 08:03:07,040 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-23 08:03:07,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:03:07,040 INFO L225 Difference]: With dead ends: 24 [2020-12-23 08:03:07,040 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 08:03:07,041 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 08:03:07,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 08:03:07,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-23 08:03:07,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 08:03:07,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-12-23 08:03:07,047 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 9 [2020-12-23 08:03:07,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:03:07,047 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-12-23 08:03:07,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 08:03:07,047 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-12-23 08:03:07,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 08:03:07,048 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:03:07,048 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:03:07,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 08:03:07,049 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:03:07,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:03:07,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1117718140, now seen corresponding path program 1 times [2020-12-23 08:03:07,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:03:07,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792550868] [2020-12-23 08:03:07,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:03:07,065 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:03:07,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1300164632] [2020-12-23 08:03:07,066 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 08:03:07,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:03:07,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 08:03:07,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:03:07,431 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 08:03:07,462 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 08:03:07,494 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 08:03:07,537 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 08:03:07,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792550868] [2020-12-23 08:03:07,538 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:03:07,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300164632] [2020-12-23 08:03:07,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:03:07,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 08:03:07,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495379252] [2020-12-23 08:03:07,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 08:03:07,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:03:07,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 08:03:07,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 08:03:07,541 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 9 states. [2020-12-23 08:03:07,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:03:07,949 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-12-23 08:03:07,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 08:03:07,950 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-12-23 08:03:07,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:03:07,951 INFO L225 Difference]: With dead ends: 39 [2020-12-23 08:03:07,951 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 08:03:07,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2020-12-23 08:03:07,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 08:03:07,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 25. [2020-12-23 08:03:07,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 08:03:07,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-12-23 08:03:07,958 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 14 [2020-12-23 08:03:07,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:03:07,959 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-12-23 08:03:07,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 08:03:07,959 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-12-23 08:03:07,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 08:03:07,960 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:03:07,960 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:03:08,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:03:08,175 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:03:08,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:03:08,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1174976442, now seen corresponding path program 1 times [2020-12-23 08:03:08,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:03:08,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668775725] [2020-12-23 08:03:08,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:03:08,191 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:03:08,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1529777287] [2020-12-23 08:03:08,192 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 08:03:08,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:03:08,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 08:03:08,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:03:08,483 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 08:03:08,501 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 08:03:08,516 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 08:03:10,586 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 08:03:10,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668775725] [2020-12-23 08:03:10,587 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:03:10,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529777287] [2020-12-23 08:03:10,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:03:10,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 08:03:10,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674527698] [2020-12-23 08:03:10,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 08:03:10,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:03:10,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 08:03:10,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:03:10,590 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 8 states. [2020-12-23 08:03:13,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:03:13,913 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-12-23 08:03:13,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 08:03:13,913 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-12-23 08:03:13,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:03:13,914 INFO L225 Difference]: With dead ends: 46 [2020-12-23 08:03:13,915 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 08:03:13,915 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 08:03:13,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 08:03:13,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2020-12-23 08:03:13,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 08:03:13,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-12-23 08:03:13,923 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 14 [2020-12-23 08:03:13,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:03:13,923 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-12-23 08:03:13,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 08:03:13,924 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-12-23 08:03:13,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 08:03:13,924 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:03:13,924 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:03:14,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:03:14,138 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:03:14,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:03:14,139 INFO L82 PathProgramCache]: Analyzing trace with hash 289487287, now seen corresponding path program 1 times [2020-12-23 08:03:14,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:03:14,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253274724] [2020-12-23 08:03:14,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:03:14,151 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:03:14,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1161238956] [2020-12-23 08:03:14,152 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 08:03:14,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:03:14,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 08:03:14,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:03:14,272 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 08:03:14,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253274724] [2020-12-23 08:03:14,273 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:03:14,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161238956] [2020-12-23 08:03:14,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:03:14,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-23 08:03:14,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736771819] [2020-12-23 08:03:14,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 08:03:14,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:03:14,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 08:03:14,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 08:03:14,282 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2020-12-23 08:03:14,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:03:14,310 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-12-23 08:03:14,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 08:03:14,311 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-23 08:03:14,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:03:14,312 INFO L225 Difference]: With dead ends: 34 [2020-12-23 08:03:14,312 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 08:03:14,313 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 08:03:14,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 08:03:14,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-23 08:03:14,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 08:03:14,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-12-23 08:03:14,327 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 15 [2020-12-23 08:03:14,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:03:14,328 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-12-23 08:03:14,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 08:03:14,328 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-12-23 08:03:14,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 08:03:14,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:03:14,329 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:03:14,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:03:14,544 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:03:14,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:03:14,545 INFO L82 PathProgramCache]: Analyzing trace with hash -935436432, now seen corresponding path program 1 times [2020-12-23 08:03:14,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:03:14,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078962256] [2020-12-23 08:03:14,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:03:14,557 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:03:14,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [217336321] [2020-12-23 08:03:14,558 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 08:03:14,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:03:14,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 08:03:14,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:03:14,890 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2020-12-23 08:03:14,890 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 08:03:14,996 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 08:03:14,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078962256] [2020-12-23 08:03:14,997 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:03:14,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217336321] [2020-12-23 08:03:14,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:03:14,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 08:03:14,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325968246] [2020-12-23 08:03:14,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 08:03:14,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:03:14,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 08:03:14,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 08:03:15,000 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 10 states. [2020-12-23 08:03:18,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:03:18,287 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-12-23 08:03:18,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 08:03:18,288 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-12-23 08:03:18,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:03:18,289 INFO L225 Difference]: With dead ends: 35 [2020-12-23 08:03:18,289 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 08:03:18,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2020-12-23 08:03:18,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 08:03:18,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2020-12-23 08:03:18,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 08:03:18,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-12-23 08:03:18,294 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2020-12-23 08:03:18,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:03:18,295 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-12-23 08:03:18,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 08:03:18,295 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-12-23 08:03:18,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 08:03:18,296 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:03:18,296 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 08:03:18,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 08:03:18,499 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:03:18,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:03:18,500 INFO L82 PathProgramCache]: Analyzing trace with hash -300473268, now seen corresponding path program 2 times [2020-12-23 08:03:18,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:03:18,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173638489] [2020-12-23 08:03:18,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:03:18,526 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:03:18,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [80753360] [2020-12-23 08:03:18,527 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 08:03:18,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:03:18,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:03:18,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 08:03:18,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:03:20,754 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 08:03:26,806 WARN L197 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 22 [2020-12-23 08:03:36,885 WARN L197 SmtUtils]: Spent 8.04 s on a formula simplification that was a NOOP. DAG size: 25 [2020-12-23 08:03:45,030 WARN L197 SmtUtils]: Spent 8.12 s on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2020-12-23 08:03:52,027 WARN L197 SmtUtils]: Spent 6.20 s on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2020-12-23 08:03:52,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173638489] [2020-12-23 08:03:52,049 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:03:52,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80753360] [2020-12-23 08:03:52,049 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-23 08:03:52,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:03:52,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-23 08:03:52,050 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-23 08:03:52,050 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 08:03:52,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:03:52,272 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-23 08:03:52,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 08:03:52 BoogieIcfgContainer [2020-12-23 08:03:52,272 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 08:03:52,273 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 08:03:52,273 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 08:03:52,273 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 08:03:52,273 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:03:05" (3/4) ... [2020-12-23 08:03:52,277 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 08:03:52,277 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 08:03:52,279 INFO L168 Benchmark]: Toolchain (without parser) took 47243.27 ms. Allocated memory was 172.0 MB in the beginning and 206.6 MB in the end (delta: 34.6 MB). Free memory was 154.1 MB in the beginning and 135.1 MB in the end (delta: 18.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 8.0 GB. [2020-12-23 08:03:52,279 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 172.0 MB. Free memory is still 144.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 08:03:52,280 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.10 ms. Allocated memory is still 172.0 MB. Free memory was 153.8 MB in the beginning and 144.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 08:03:52,281 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.54 ms. Allocated memory is still 172.0 MB. Free memory was 144.0 MB in the beginning and 142.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 08:03:52,282 INFO L168 Benchmark]: Boogie Preprocessor took 76.48 ms. Allocated memory is still 172.0 MB. Free memory was 142.5 MB in the beginning and 155.0 MB in the end (delta: -12.5 MB). Peak memory consumption was 2.9 MB. Max. memory is 8.0 GB. [2020-12-23 08:03:52,283 INFO L168 Benchmark]: RCFGBuilder took 398.29 ms. Allocated memory is still 172.0 MB. Free memory was 154.8 MB in the beginning and 141.6 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-12-23 08:03:52,284 INFO L168 Benchmark]: TraceAbstraction took 46458.45 ms. Allocated memory was 172.0 MB in the beginning and 206.6 MB in the end (delta: 34.6 MB). Free memory was 141.1 MB in the beginning and 135.4 MB in the end (delta: 5.7 MB). Peak memory consumption was 41.6 MB. Max. memory is 8.0 GB. [2020-12-23 08:03:52,284 INFO L168 Benchmark]: Witness Printer took 4.63 ms. Allocated memory is still 206.6 MB. Free memory was 135.4 MB in the beginning and 135.1 MB in the end (delta: 305.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 08:03:52,289 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 172.0 MB. Free memory is still 144.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 261.10 ms. Allocated memory is still 172.0 MB. Free memory was 153.8 MB in the beginning and 144.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 37.54 ms. Allocated memory is still 172.0 MB. Free memory was 144.0 MB in the beginning and 142.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 76.48 ms. Allocated memory is still 172.0 MB. Free memory was 142.5 MB in the beginning and 155.0 MB in the end (delta: -12.5 MB). Peak memory consumption was 2.9 MB. Max. memory is 8.0 GB. * RCFGBuilder took 398.29 ms. Allocated memory is still 172.0 MB. Free memory was 154.8 MB in the beginning and 141.6 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 46458.45 ms. Allocated memory was 172.0 MB in the beginning and 206.6 MB in the end (delta: 34.6 MB). Free memory was 141.1 MB in the beginning and 135.4 MB in the end (delta: 5.7 MB). Peak memory consumption was 41.6 MB. Max. memory is 8.0 GB. * Witness Printer took 4.63 ms. Allocated memory is still 206.6 MB. Free memory was 135.4 MB in the beginning and 135.1 MB in the end (delta: 305.2 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: [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++<20 [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++<20 [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++<20 [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: 46.3s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 7.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 97 SDtfs, 284 SDslu, 163 SDs, 0 SdLazy, 223 SolverSat, 65 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 5.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 95 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.7s 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, 0.1s SatisfiabilityAnalysisTime, 3.3s 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...