/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/divbin_unwindbound5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:09:24,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:09:24,119 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:09:24,178 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 05:09:24,178 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 05:09:24,182 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 05:09:24,186 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 05:09:24,194 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 05:09:24,198 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 05:09:24,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 05:09:24,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 05:09:24,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 05:09:24,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 05:09:24,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 05:09:24,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 05:09:24,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 05:09:24,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 05:09:24,234 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 05:09:24,236 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 05:09:24,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 05:09:24,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 05:09:24,244 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 05:09:24,247 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 05:09:24,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 05:09:24,254 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 05:09:24,254 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 05:09:24,255 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 05:09:24,260 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 05:09:24,262 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 05:09:24,263 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 05:09:24,263 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 05:09:24,264 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 05:09:24,265 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 05:09:24,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 05:09:24,267 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 05:09:24,268 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 05:09:24,269 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 05:09:24,270 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 05:09:24,270 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:09:24,271 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:09:24,272 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:09:24,277 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:09:24,326 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:09:24,326 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:09:24,328 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:09:24,328 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:09:24,328 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:09:24,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:09:24,329 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:09:24,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:09:24,329 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:09:24,329 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:09:24,330 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:09:24,330 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:09:24,330 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:09:24,330 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:09:24,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:09:24,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:09:24,331 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:09:24,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:09:24,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:09:24,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:09:24,332 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:09:24,332 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:09:24,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:09:24,333 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:09:24,333 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:09:24,333 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:09:24,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:09:24,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:09:24,749 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:09:24,750 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:09:24,751 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:09:24,752 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i [2020-12-22 05:09:24,835 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bedcf0100/bed40e50eff7431992e6d8c0d6688100/FLAG8b7a62fb3 [2020-12-22 05:09:25,440 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:09:25,440 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i [2020-12-22 05:09:25,448 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bedcf0100/bed40e50eff7431992e6d8c0d6688100/FLAG8b7a62fb3 [2020-12-22 05:09:25,808 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bedcf0100/bed40e50eff7431992e6d8c0d6688100 [2020-12-22 05:09:25,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:09:25,818 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:09:25,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:09:25,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:09:25,824 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:09:25,825 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:09:25" (1/1) ... [2020-12-22 05:09:25,828 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42d7546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:09:25, skipping insertion in model container [2020-12-22 05:09:25,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:09:25" (1/1) ... [2020-12-22 05:09:25,837 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:09:25,858 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:09:26,032 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i[950,963] [2020-12-22 05:09:26,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:09:26,060 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:09:26,074 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i[950,963] [2020-12-22 05:09:26,081 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:09:26,101 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:09:26,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:09:26 WrapperNode [2020-12-22 05:09:26,102 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:09:26,103 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:09:26,103 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:09:26,103 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:09:26,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:09:26" (1/1) ... [2020-12-22 05:09:26,117 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:09:26" (1/1) ... [2020-12-22 05:09:26,140 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:09:26,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:09:26,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:09:26,141 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:09:26,150 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:09:26" (1/1) ... [2020-12-22 05:09:26,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:09:26" (1/1) ... [2020-12-22 05:09:26,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:09:26" (1/1) ... [2020-12-22 05:09:26,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:09:26" (1/1) ... [2020-12-22 05:09:26,157 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:09:26" (1/1) ... [2020-12-22 05:09:26,162 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:09:26" (1/1) ... [2020-12-22 05:09:26,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:09:26" (1/1) ... [2020-12-22 05:09:26,166 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:09:26,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:09:26,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:09:26,168 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:09:26,169 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:09:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:09:26,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:09:26,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:09:26,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:09:26,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:09:26,630 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:09:26,630 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2020-12-22 05:09:26,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:09:26 BoogieIcfgContainer [2020-12-22 05:09:26,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:09:26,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:09:26,637 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:09:26,645 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:09:26,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:09:25" (1/3) ... [2020-12-22 05:09:26,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@568f5a37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:09:26, skipping insertion in model container [2020-12-22 05:09:26,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:09:26" (2/3) ... [2020-12-22 05:09:26,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@568f5a37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:09:26, skipping insertion in model container [2020-12-22 05:09:26,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:09:26" (3/3) ... [2020-12-22 05:09:26,650 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound5.i [2020-12-22 05:09:26,658 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:09:26,663 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 05:09:26,684 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 05:09:26,714 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:09:26,714 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:09:26,714 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:09:26,714 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:09:26,715 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:09:26,715 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:09:26,715 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:09:26,715 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:09:26,732 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-12-22 05:09:26,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 05:09:26,738 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:09:26,739 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:09:26,739 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:09:26,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:09:26,747 INFO L82 PathProgramCache]: Analyzing trace with hash 344827834, now seen corresponding path program 1 times [2020-12-22 05:09:26,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:09:26,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949378754] [2020-12-22 05:09:26,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:09:26,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:09:26,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:09:26,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949378754] [2020-12-22 05:09:26,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:09:26,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:09:26,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947601070] [2020-12-22 05:09:26,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 05:09:26,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:09:26,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 05:09:26,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:09:26,955 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-12-22 05:09:26,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:09:26,976 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2020-12-22 05:09:26,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 05:09:26,977 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-22 05:09:26,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:09:26,988 INFO L225 Difference]: With dead ends: 45 [2020-12-22 05:09:26,989 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 05:09:26,992 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 [2020-12-22 05:09:27,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 05:09:27,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-22 05:09:27,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 05:09:27,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-12-22 05:09:27,031 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2020-12-22 05:09:27,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:09:27,032 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-12-22 05:09:27,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 05:09:27,032 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-12-22 05:09:27,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 05:09:27,033 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:09:27,033 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:09:27,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 05:09:27,034 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:09:27,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:09:27,035 INFO L82 PathProgramCache]: Analyzing trace with hash 514095505, now seen corresponding path program 1 times [2020-12-22 05:09:27,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:09:27,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109185336] [2020-12-22 05:09:27,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:09:27,063 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:09:27,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [310905357] [2020-12-22 05:09:27,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:09:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:09:27,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 05:09:27,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:09:27,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:09:27,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109185336] [2020-12-22 05:09:27,322 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:09:27,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310905357] [2020-12-22 05:09:27,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:09:27,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 05:09:27,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157084378] [2020-12-22 05:09:27,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:09:27,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:09:27,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:09:27,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:09:27,327 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 4 states. [2020-12-22 05:09:27,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:09:27,353 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2020-12-22 05:09:27,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 05:09:27,354 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-22 05:09:27,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:09:27,355 INFO L225 Difference]: With dead ends: 33 [2020-12-22 05:09:27,355 INFO L226 Difference]: Without dead ends: 22 [2020-12-22 05:09:27,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:09:27,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-22 05:09:27,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-22 05:09:27,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 05:09:27,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-12-22 05:09:27,362 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 12 [2020-12-22 05:09:27,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:09:27,363 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-12-22 05:09:27,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:09:27,363 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-12-22 05:09:27,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 05:09:27,364 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:09:27,364 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:09:27,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 05:09:27,578 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:09:27,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:09:27,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1194113768, now seen corresponding path program 1 times [2020-12-22 05:09:27,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:09:27,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302271251] [2020-12-22 05:09:27,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:09:27,601 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:09:27,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1217169510] [2020-12-22 05:09:27,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:09:27,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:09:27,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 05:09:27,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:09:27,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:09:27,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302271251] [2020-12-22 05:09:27,890 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:09:27,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217169510] [2020-12-22 05:09:27,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:09:27,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 05:09:27,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467679718] [2020-12-22 05:09:27,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 05:09:27,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:09:27,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 05:09:27,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:09:27,893 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 7 states. [2020-12-22 05:09:28,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:09:28,113 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-12-22 05:09:28,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 05:09:28,114 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-12-22 05:09:28,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:09:28,117 INFO L225 Difference]: With dead ends: 40 [2020-12-22 05:09:28,118 INFO L226 Difference]: Without dead ends: 33 [2020-12-22 05:09:28,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-12-22 05:09:28,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-22 05:09:28,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2020-12-22 05:09:28,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 05:09:28,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-12-22 05:09:28,132 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 13 [2020-12-22 05:09:28,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:09:28,132 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-12-22 05:09:28,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 05:09:28,133 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-12-22 05:09:28,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 05:09:28,134 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:09:28,134 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:09:28,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:09:28,349 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:09:28,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:09:28,351 INFO L82 PathProgramCache]: Analyzing trace with hash 483460221, now seen corresponding path program 1 times [2020-12-22 05:09:28,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:09:28,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69625041] [2020-12-22 05:09:28,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:09:28,378 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:09:28,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1575921307] [2020-12-22 05:09:28,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:09:28,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:09:28,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 05:09:28,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:09:28,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:09:28,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69625041] [2020-12-22 05:09:28,514 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:09:28,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575921307] [2020-12-22 05:09:28,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:09:28,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-22 05:09:28,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867876223] [2020-12-22 05:09:28,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:09:28,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:09:28,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:09:28,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:09:28,519 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 5 states. [2020-12-22 05:09:28,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:09:28,563 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-12-22 05:09:28,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:09:28,564 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-22 05:09:28,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:09:28,568 INFO L225 Difference]: With dead ends: 42 [2020-12-22 05:09:28,568 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 05:09:28,569 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 [2020-12-22 05:09:28,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 05:09:28,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-12-22 05:09:28,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 05:09:28,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-12-22 05:09:28,587 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 15 [2020-12-22 05:09:28,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:09:28,587 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-12-22 05:09:28,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:09:28,588 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-12-22 05:09:28,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 05:09:28,588 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:09:28,588 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:09:28,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:09:28,791 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:09:28,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:09:28,793 INFO L82 PathProgramCache]: Analyzing trace with hash -2143807572, now seen corresponding path program 1 times [2020-12-22 05:09:28,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:09:28,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459877326] [2020-12-22 05:09:28,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:09:28,836 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:09:28,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1580060459] [2020-12-22 05:09:28,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:09:28,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:09:28,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 05:09:28,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:09:29,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:09:29,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459877326] [2020-12-22 05:09:29,183 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:09:29,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580060459] [2020-12-22 05:09:29,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:09:29,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-22 05:09:29,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699556474] [2020-12-22 05:09:29,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 05:09:29,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:09:29,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 05:09:29,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-22 05:09:29,186 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 10 states. [2020-12-22 05:09:30,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:09:30,040 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2020-12-22 05:09:30,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 05:09:30,041 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-12-22 05:09:30,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:09:30,042 INFO L225 Difference]: With dead ends: 64 [2020-12-22 05:09:30,042 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 05:09:30,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2020-12-22 05:09:30,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 05:09:30,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2020-12-22 05:09:30,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 05:09:30,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-12-22 05:09:30,048 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 16 [2020-12-22 05:09:30,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:09:30,049 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-12-22 05:09:30,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 05:09:30,049 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-12-22 05:09:30,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 05:09:30,050 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:09:30,050 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:09:30,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:09:30,256 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:09:30,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:09:30,257 INFO L82 PathProgramCache]: Analyzing trace with hash -681488537, now seen corresponding path program 1 times [2020-12-22 05:09:30,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:09:30,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857054176] [2020-12-22 05:09:30,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:09:30,288 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:09:30,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [419380946] [2020-12-22 05:09:30,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:09:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:09:30,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 05:09:30,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:09:30,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:09:30,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857054176] [2020-12-22 05:09:30,367 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:09:30,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419380946] [2020-12-22 05:09:30,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:09:30,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 05:09:30,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479714846] [2020-12-22 05:09:30,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 05:09:30,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:09:30,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 05:09:30,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 05:09:30,369 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 3 states. [2020-12-22 05:09:30,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:09:30,395 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2020-12-22 05:09:30,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 05:09:30,396 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-12-22 05:09:30,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:09:30,396 INFO L225 Difference]: With dead ends: 50 [2020-12-22 05:09:30,396 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 05:09:30,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 05:09:30,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 05:09:30,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-22 05:09:30,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 05:09:30,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-12-22 05:09:30,402 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2020-12-22 05:09:30,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:09:30,402 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-12-22 05:09:30,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 05:09:30,402 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-12-22 05:09:30,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 05:09:30,403 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:09:30,403 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:09:30,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 05:09:30,617 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:09:30,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:09:30,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1690106195, now seen corresponding path program 1 times [2020-12-22 05:09:30,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:09:30,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348648620] [2020-12-22 05:09:30,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:09:30,634 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:09:30,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [704631396] [2020-12-22 05:09:30,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:09:30,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:09:30,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 05:09:30,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:09:30,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 05:09:30,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348648620] [2020-12-22 05:09:30,833 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:09:30,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704631396] [2020-12-22 05:09:30,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:09:30,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-22 05:09:30,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789943225] [2020-12-22 05:09:30,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:09:30,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:09:30,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:09:30,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:09:30,835 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 6 states. [2020-12-22 05:09:30,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:09:30,984 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-12-22 05:09:30,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 05:09:30,985 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-12-22 05:09:30,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:09:30,986 INFO L225 Difference]: With dead ends: 46 [2020-12-22 05:09:30,986 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 05:09:30,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-22 05:09:30,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 05:09:30,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2020-12-22 05:09:30,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-22 05:09:30,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-12-22 05:09:30,992 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 21 [2020-12-22 05:09:30,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:09:30,993 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-12-22 05:09:30,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:09:30,993 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-12-22 05:09:30,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 05:09:30,994 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:09:30,994 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:09:31,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:09:31,206 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:09:31,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:09:31,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1038743540, now seen corresponding path program 2 times [2020-12-22 05:09:31,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:09:31,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989237903] [2020-12-22 05:09:31,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:09:31,222 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:09:31,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195351048] [2020-12-22 05:09:31,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:09:31,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:09:31,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:09:31,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 05:09:31,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:09:31,845 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:09:31,937 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:09:31,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989237903] [2020-12-22 05:09:31,938 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:09:31,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195351048] [2020-12-22 05:09:31,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:09:31,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-22 05:09:31,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055276208] [2020-12-22 05:09:31,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 05:09:31,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:09:31,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 05:09:31,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:09:31,940 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 9 states. [2020-12-22 05:09:32,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:09:32,274 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2020-12-22 05:09:32,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 05:09:32,275 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-12-22 05:09:32,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:09:32,276 INFO L225 Difference]: With dead ends: 68 [2020-12-22 05:09:32,276 INFO L226 Difference]: Without dead ends: 35 [2020-12-22 05:09:32,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-12-22 05:09:32,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-22 05:09:32,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-12-22 05:09:32,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-22 05:09:32,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-12-22 05:09:32,282 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 26 [2020-12-22 05:09:32,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:09:32,283 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-12-22 05:09:32,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 05:09:32,283 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-12-22 05:09:32,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 05:09:32,284 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:09:32,284 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:09:32,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:09:32,491 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:09:32,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:09:32,492 INFO L82 PathProgramCache]: Analyzing trace with hash 346519601, now seen corresponding path program 1 times [2020-12-22 05:09:32,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:09:32,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993626632] [2020-12-22 05:09:32,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:09:32,512 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:09:32,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343364660] [2020-12-22 05:09:32,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:09:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:09:32,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 05:09:32,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:09:32,614 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 05:09:32,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993626632] [2020-12-22 05:09:32,614 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:09:32,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343364660] [2020-12-22 05:09:32,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:09:32,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-22 05:09:32,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640597272] [2020-12-22 05:09:32,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:09:32,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:09:32,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:09:32,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:09:32,617 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 6 states. [2020-12-22 05:09:32,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:09:32,652 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2020-12-22 05:09:32,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:09:32,652 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-12-22 05:09:32,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:09:32,653 INFO L225 Difference]: With dead ends: 57 [2020-12-22 05:09:32,653 INFO L226 Difference]: Without dead ends: 37 [2020-12-22 05:09:32,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:09:32,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-22 05:09:32,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-22 05:09:32,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 05:09:32,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-12-22 05:09:32,659 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 28 [2020-12-22 05:09:32,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:09:32,660 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-12-22 05:09:32,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:09:32,660 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-12-22 05:09:32,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 05:09:32,661 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:09:32,661 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:09:32,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 05:09:32,876 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:09:32,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:09:32,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1597045256, now seen corresponding path program 3 times [2020-12-22 05:09:32,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:09:32,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798798950] [2020-12-22 05:09:32,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:09:32,893 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:09:32,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1020536716] [2020-12-22 05:09:32,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:09:33,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 05:09:33,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:09:33,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 05:09:33,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:09:33,815 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:09:33,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798798950] [2020-12-22 05:09:33,815 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:09:33,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020536716] [2020-12-22 05:09:33,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:09:33,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 05:09:33,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615093392] [2020-12-22 05:09:33,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 05:09:33,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:09:33,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 05:09:33,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:09:33,818 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 9 states. [2020-12-22 05:09:33,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:09:33,869 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2020-12-22 05:09:33,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 05:09:33,869 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-12-22 05:09:33,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:09:33,870 INFO L225 Difference]: With dead ends: 67 [2020-12-22 05:09:33,870 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 05:09:33,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-22 05:09:33,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 05:09:33,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-22 05:09:33,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 05:09:33,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-12-22 05:09:33,875 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2020-12-22 05:09:33,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:09:33,875 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-12-22 05:09:33,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 05:09:33,876 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-12-22 05:09:33,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 05:09:33,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:09:33,877 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:09:34,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:09:34,081 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:09:34,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:09:34,082 INFO L82 PathProgramCache]: Analyzing trace with hash 2031166962, now seen corresponding path program 1 times [2020-12-22 05:09:34,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:09:34,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688919263] [2020-12-22 05:09:34,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:09:34,097 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:09:34,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [917758198] [2020-12-22 05:09:34,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:09:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:09:39,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-22 05:09:39,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:09:40,007 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-12-22 05:09:40,857 WARN L197 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-12-22 05:09:41,459 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:09:42,667 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:09:43,842 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:09:45,204 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:09:45,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688919263] [2020-12-22 05:09:45,246 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:09:45,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917758198] [2020-12-22 05:09:45,247 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2020-12-22 05:09:45,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:09:45,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-22 05:09:45,247 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-22 05:09:45,247 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 05:09:45,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:09:45,477 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-22 05:09:45,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 05:09:45 BoogieIcfgContainer [2020-12-22 05:09:45,477 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 05:09:45,478 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 05:09:45,478 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 05:09:45,478 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 05:09:45,479 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:09:26" (3/4) ... [2020-12-22 05:09:45,482 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-22 05:09:45,482 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 05:09:45,484 INFO L168 Benchmark]: Toolchain (without parser) took 19665.57 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 126.3 MB in the beginning and 175.5 MB in the end (delta: -49.2 MB). Peak memory consumption was 19.1 MB. Max. memory is 8.0 GB. [2020-12-22 05:09:45,485 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:09:45,485 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.98 ms. Allocated memory is still 151.0 MB. Free memory was 126.1 MB in the beginning and 116.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-22 05:09:45,486 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.34 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 114.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:09:45,487 INFO L168 Benchmark]: Boogie Preprocessor took 25.65 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 113.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:09:45,487 INFO L168 Benchmark]: RCFGBuilder took 464.88 ms. Allocated memory is still 151.0 MB. Free memory was 113.5 MB in the beginning and 132.2 MB in the end (delta: -18.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-12-22 05:09:45,489 INFO L168 Benchmark]: TraceAbstraction took 18843.44 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 131.7 MB in the beginning and 175.5 MB in the end (delta: -43.8 MB). Peak memory consumption was 135.5 MB. Max. memory is 8.0 GB. [2020-12-22 05:09:45,490 INFO L168 Benchmark]: Witness Printer took 4.85 ms. Allocated memory is still 218.1 MB. Free memory is still 175.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:09:45,497 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 281.98 ms. Allocated memory is still 151.0 MB. Free memory was 126.1 MB in the beginning and 116.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 37.34 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 114.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 25.65 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 113.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 464.88 ms. Allocated memory is still 151.0 MB. Free memory was 113.5 MB in the beginning and 132.2 MB in the end (delta: -18.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 18843.44 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 131.7 MB in the beginning and 175.5 MB in the end (delta: -43.8 MB). Peak memory consumption was 135.5 MB. Max. memory is 8.0 GB. * Witness Printer took 4.85 ms. Allocated memory is still 218.1 MB. Free memory is still 175.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 21]: 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: [L25] int counter = 0; [L27] unsigned A, B; [L28] unsigned q, r, b; [L29] A = __VERIFIER_nondet_uint() [L30] B = __VERIFIER_nondet_uint() [L16] COND FALSE !(!cond) [L16] COND FALSE !(!cond) [L33] q = 0 [L34] r = A [L35] b = B [L36] EXPR counter++ [L36] COND TRUE counter++<5 [L37] COND FALSE !(!(r >= b)) [L38] b = 2 * b [L36] EXPR counter++ [L36] COND TRUE counter++<5 [L37] COND FALSE !(!(r >= b)) [L38] b = 2 * b [L36] EXPR counter++ [L36] COND TRUE counter++<5 [L37] COND TRUE !(r >= b) [L40] EXPR counter++ [L40] COND TRUE counter++<5 [L19] COND FALSE !(!(cond)) [L42] COND FALSE !(!(b != B)) [L43] q = 2 * q [L44] b = b / 2 [L45] COND TRUE r >= b [L46] q = q + 1 [L47] r = r - b [L40] EXPR counter++ [L40] COND TRUE counter++<5 [L19] COND FALSE !(!(cond)) [L42] COND FALSE !(!(b != B)) [L43] q = 2 * q [L44] b = b / 2 [L45] COND TRUE r >= b [L46] q = q + 1 [L47] r = r - b [L40] EXPR counter++ [L40] COND FALSE !(counter++<5) [L19] COND TRUE !(cond) [L21] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 18.7s, OverallIterations: 11, TraceHistogramMax: 3, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 219 SDtfs, 388 SDslu, 380 SDs, 0 SdLazy, 330 SolverSat, 70 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 201 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=9, 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, 10 MinimizatonAttempts, 33 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 189 NumberOfCodeBlocks, 189 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 179 ConstructedInterpolants, 0 QuantifiedInterpolants, 19755 SizeOfPredicates, 39 NumberOfNonLiveVariables, 806 ConjunctsInSsa, 124 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 42/66 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...