./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-benchs/filter2_reinit.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-benchs/filter2_reinit.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 77348271d6b3efbe553fb980482d4643f648de35ae877e068f35f88b7419ce44 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 11:48:36,511 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 11:48:36,512 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 11:48:36,542 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 11:48:36,542 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 11:48:36,543 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 11:48:36,544 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 11:48:36,545 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 11:48:36,546 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 11:48:36,547 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 11:48:36,550 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 11:48:36,553 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 11:48:36,554 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 11:48:36,558 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 11:48:36,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 11:48:36,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 11:48:36,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 11:48:36,565 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 11:48:36,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 11:48:36,570 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 11:48:36,570 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 11:48:36,575 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 11:48:36,576 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 11:48:36,577 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 11:48:36,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 11:48:36,582 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 11:48:36,582 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 11:48:36,583 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 11:48:36,583 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 11:48:36,584 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 11:48:36,584 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 11:48:36,584 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 11:48:36,585 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 11:48:36,585 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 11:48:36,586 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 11:48:36,586 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 11:48:36,587 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 11:48:36,587 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 11:48:36,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 11:48:36,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 11:48:36,588 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 11:48:36,589 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 11:48:36,604 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 11:48:36,604 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 11:48:36,605 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 11:48:36,605 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 11:48:36,605 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 11:48:36,605 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 11:48:36,606 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 11:48:36,606 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 11:48:36,606 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 11:48:36,606 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 11:48:36,607 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 11:48:36,607 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 11:48:36,607 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 11:48:36,607 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 11:48:36,607 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 11:48:36,607 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 11:48:36,607 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 11:48:36,608 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 11:48:36,608 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 11:48:36,608 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 11:48:36,608 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 11:48:36,608 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 11:48:36,608 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 11:48:36,609 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 11:48:36,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:48:36,609 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 11:48:36,609 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 11:48:36,609 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 11:48:36,609 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 11:48:36,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 11:48:36,610 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 11:48:36,610 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 11:48:36,610 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 11:48:36,610 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 11:48:36,610 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 77348271d6b3efbe553fb980482d4643f648de35ae877e068f35f88b7419ce44 [2021-12-21 11:48:36,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 11:48:36,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 11:48:36,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 11:48:36,818 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 11:48:36,819 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 11:48:36,820 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/filter2_reinit.c [2021-12-21 11:48:36,870 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9ae2c157/6aa067ba5aed4efba7007336a9d50b99/FLAGdbc9b877f [2021-12-21 11:48:37,224 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 11:48:37,225 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/filter2_reinit.c [2021-12-21 11:48:37,232 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9ae2c157/6aa067ba5aed4efba7007336a9d50b99/FLAGdbc9b877f [2021-12-21 11:48:37,655 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9ae2c157/6aa067ba5aed4efba7007336a9d50b99 [2021-12-21 11:48:37,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 11:48:37,658 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 11:48:37,663 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 11:48:37,663 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 11:48:37,666 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 11:48:37,666 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:48:37" (1/1) ... [2021-12-21 11:48:37,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79ada777 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:37, skipping insertion in model container [2021-12-21 11:48:37,667 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:48:37" (1/1) ... [2021-12-21 11:48:37,672 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 11:48:37,683 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 11:48:37,801 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/filter2_reinit.c[700,713] [2021-12-21 11:48:37,812 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:48:37,817 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 11:48:37,825 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/filter2_reinit.c[700,713] [2021-12-21 11:48:37,830 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:48:37,840 INFO L208 MainTranslator]: Completed translation [2021-12-21 11:48:37,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:37 WrapperNode [2021-12-21 11:48:37,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 11:48:37,841 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 11:48:37,841 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 11:48:37,842 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 11:48:37,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:37" (1/1) ... [2021-12-21 11:48:37,850 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:37" (1/1) ... [2021-12-21 11:48:37,860 INFO L137 Inliner]: procedures = 15, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2021-12-21 11:48:37,865 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 11:48:37,866 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 11:48:37,866 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 11:48:37,866 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 11:48:37,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:37" (1/1) ... [2021-12-21 11:48:37,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:37" (1/1) ... [2021-12-21 11:48:37,879 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:37" (1/1) ... [2021-12-21 11:48:37,880 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:37" (1/1) ... [2021-12-21 11:48:37,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:37" (1/1) ... [2021-12-21 11:48:37,885 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:37" (1/1) ... [2021-12-21 11:48:37,886 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:37" (1/1) ... [2021-12-21 11:48:37,887 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 11:48:37,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 11:48:37,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 11:48:37,888 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 11:48:37,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:37" (1/1) ... [2021-12-21 11:48:37,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:48:37,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:48:37,910 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 11:48:37,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 11:48:37,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 11:48:37,934 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 11:48:37,935 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 11:48:37,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 11:48:37,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 11:48:37,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 11:48:37,973 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 11:48:37,974 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 11:48:38,053 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 11:48:38,058 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 11:48:38,058 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 11:48:38,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:48:38 BoogieIcfgContainer [2021-12-21 11:48:38,059 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 11:48:38,060 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 11:48:38,060 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 11:48:38,063 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 11:48:38,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:48:37" (1/3) ... [2021-12-21 11:48:38,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@489fe47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:48:38, skipping insertion in model container [2021-12-21 11:48:38,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:37" (2/3) ... [2021-12-21 11:48:38,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@489fe47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:48:38, skipping insertion in model container [2021-12-21 11:48:38,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:48:38" (3/3) ... [2021-12-21 11:48:38,065 INFO L111 eAbstractionObserver]: Analyzing ICFG filter2_reinit.c [2021-12-21 11:48:38,068 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 11:48:38,068 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 11:48:38,106 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 11:48:38,111 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 11:48:38,114 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 11:48:38,135 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 11:48:38,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-21 11:48:38,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:48:38,141 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:48:38,141 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:48:38,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:48:38,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1343975806, now seen corresponding path program 1 times [2021-12-21 11:48:38,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:48:38,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578753480] [2021-12-21 11:48:38,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:48:38,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:48:38,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 11:48:38,279 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 11:48:38,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 11:48:38,345 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 11:48:38,347 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-21 11:48:38,348 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-21 11:48:38,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 11:48:38,353 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-12-21 11:48:38,356 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-21 11:48:38,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 11:48:38 BoogieIcfgContainer [2021-12-21 11:48:38,385 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-21 11:48:38,387 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-21 11:48:38,388 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-21 11:48:38,388 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-21 11:48:38,388 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:48:38" (3/4) ... [2021-12-21 11:48:38,391 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-21 11:48:38,391 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-21 11:48:38,392 INFO L158 Benchmark]: Toolchain (without parser) took 733.71ms. Allocated memory is still 111.1MB. Free memory was 74.1MB in the beginning and 59.5MB in the end (delta: 14.6MB). Peak memory consumption was 12.0MB. Max. memory is 16.1GB. [2021-12-21 11:48:38,393 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 111.1MB. Free memory is still 90.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 11:48:38,394 INFO L158 Benchmark]: CACSL2BoogieTranslator took 177.44ms. Allocated memory is still 111.1MB. Free memory was 73.8MB in the beginning and 86.7MB in the end (delta: -12.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 11:48:38,394 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.16ms. Allocated memory is still 111.1MB. Free memory was 86.7MB in the beginning and 85.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 11:48:38,395 INFO L158 Benchmark]: Boogie Preprocessor took 20.89ms. Allocated memory is still 111.1MB. Free memory was 85.2MB in the beginning and 84.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 11:48:38,399 INFO L158 Benchmark]: RCFGBuilder took 172.15ms. Allocated memory is still 111.1MB. Free memory was 84.1MB in the beginning and 74.7MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 11:48:38,399 INFO L158 Benchmark]: TraceAbstraction took 324.72ms. Allocated memory is still 111.1MB. Free memory was 74.2MB in the beginning and 60.0MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-12-21 11:48:38,401 INFO L158 Benchmark]: Witness Printer took 4.05ms. Allocated memory is still 111.1MB. Free memory was 60.0MB in the beginning and 59.5MB in the end (delta: 488.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 11:48:38,406 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 111.1MB. Free memory is still 90.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 177.44ms. Allocated memory is still 111.1MB. Free memory was 73.8MB in the beginning and 86.7MB in the end (delta: -12.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.16ms. Allocated memory is still 111.1MB. Free memory was 86.7MB in the beginning and 85.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.89ms. Allocated memory is still 111.1MB. Free memory was 85.2MB in the beginning and 84.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 172.15ms. Allocated memory is still 111.1MB. Free memory was 84.1MB in the beginning and 74.7MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 324.72ms. Allocated memory is still 111.1MB. Free memory was 74.2MB in the beginning and 60.0MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Witness Printer took 4.05ms. Allocated memory is still 111.1MB. Free memory was 60.0MB in the beginning and 59.5MB in the end (delta: 488.6kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 18]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 53, overapproximation of to_real at line 31, overapproximation of someBinaryArithmeticDOUBLEoperation at line 51. Possible FailurePath: [L23] double E, E0, E1, S0, S1, S; [L24] int i; [L26] E = __VERIFIER_nondet_double() [L27] E0 = __VERIFIER_nondet_double() [L28] CALL assume_abort_if_not(E >= 0. && E <= 1.) VAL [\old(cond)=1] [L16] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L28] RET assume_abort_if_not(E >= 0. && E <= 1.) [L29] CALL assume_abort_if_not(E0 >= 0. && E0 <= 1.) VAL [\old(cond)=1] [L16] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L29] RET assume_abort_if_not(E0 >= 0. && E0 <= 1.) [L31] S0 = 0 [L32] S = 0 [L34] i = 0 VAL [i=0] [L34] COND TRUE i <= 1000000 [L36] E1 = E0 [L37] E0 = E [L39] E = __VERIFIER_nondet_double() [L40] CALL assume_abort_if_not(E >= 0. && E <= 1.) VAL [\old(cond)=1] [L16] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L40] RET assume_abort_if_not(E >= 0. && E <= 1.) VAL [E=49, E=51, E=50, i=0] [L42] COND TRUE __VERIFIER_nondet_int() [L43] E1 = E [L44] E0 = E [L45] S0 = E [L46] S = E VAL [E=50, E=50, E=50, i=0, S=50, S0=50] [L49] S1 = S0 [L50] S0 = S [L51] S = 0.7*E - E0*1.3 + E1*1.1 + S0*1.4 - S1*0.7 [L53] CALL __VERIFIER_assert(S >= -4. && S <= 4.) [L18] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L18] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 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 [2021-12-21 11:48:38,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-benchs/filter2_reinit.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 77348271d6b3efbe553fb980482d4643f648de35ae877e068f35f88b7419ce44 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 11:48:40,106 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 11:48:40,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 11:48:40,142 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 11:48:40,143 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 11:48:40,146 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 11:48:40,147 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 11:48:40,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 11:48:40,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 11:48:40,158 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 11:48:40,158 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 11:48:40,159 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 11:48:40,160 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 11:48:40,161 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 11:48:40,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 11:48:40,165 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 11:48:40,166 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 11:48:40,166 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 11:48:40,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 11:48:40,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 11:48:40,172 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 11:48:40,172 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 11:48:40,173 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 11:48:40,174 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 11:48:40,178 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 11:48:40,180 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 11:48:40,181 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 11:48:40,181 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 11:48:40,182 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 11:48:40,183 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 11:48:40,183 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 11:48:40,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 11:48:40,184 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 11:48:40,185 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 11:48:40,186 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 11:48:40,186 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 11:48:40,187 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 11:48:40,187 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 11:48:40,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 11:48:40,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 11:48:40,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 11:48:40,191 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-21 11:48:40,213 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 11:48:40,213 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 11:48:40,214 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 11:48:40,214 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 11:48:40,215 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 11:48:40,215 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 11:48:40,216 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 11:48:40,216 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 11:48:40,216 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 11:48:40,216 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 11:48:40,217 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 11:48:40,217 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 11:48:40,217 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 11:48:40,217 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 11:48:40,218 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 11:48:40,218 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 11:48:40,218 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 11:48:40,218 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-21 11:48:40,218 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-21 11:48:40,218 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 11:48:40,219 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 11:48:40,219 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 11:48:40,219 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 11:48:40,219 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 11:48:40,219 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 11:48:40,224 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 11:48:40,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:48:40,225 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 11:48:40,225 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 11:48:40,225 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 11:48:40,225 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-21 11:48:40,225 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-21 11:48:40,226 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 11:48:40,226 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 11:48:40,226 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 11:48:40,226 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 11:48:40,226 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-21 11:48:40,227 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 77348271d6b3efbe553fb980482d4643f648de35ae877e068f35f88b7419ce44 [2021-12-21 11:48:40,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 11:48:40,491 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 11:48:40,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 11:48:40,494 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 11:48:40,495 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 11:48:40,496 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/filter2_reinit.c [2021-12-21 11:48:40,540 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c8ba0bd3/b3986878c2434fefb38afd03f42e8d01/FLAGabe9581b0 [2021-12-21 11:48:40,873 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 11:48:40,873 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/filter2_reinit.c [2021-12-21 11:48:40,877 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c8ba0bd3/b3986878c2434fefb38afd03f42e8d01/FLAGabe9581b0 [2021-12-21 11:48:40,896 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c8ba0bd3/b3986878c2434fefb38afd03f42e8d01 [2021-12-21 11:48:40,898 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 11:48:40,899 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 11:48:40,900 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 11:48:40,901 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 11:48:40,905 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 11:48:40,906 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:48:40" (1/1) ... [2021-12-21 11:48:40,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@704ca657 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:40, skipping insertion in model container [2021-12-21 11:48:40,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:48:40" (1/1) ... [2021-12-21 11:48:40,912 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 11:48:40,921 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 11:48:41,008 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/filter2_reinit.c[700,713] [2021-12-21 11:48:41,026 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:48:41,034 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 11:48:41,041 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/filter2_reinit.c[700,713] [2021-12-21 11:48:41,046 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:48:41,055 INFO L208 MainTranslator]: Completed translation [2021-12-21 11:48:41,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:41 WrapperNode [2021-12-21 11:48:41,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 11:48:41,056 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 11:48:41,056 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 11:48:41,057 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 11:48:41,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:41" (1/1) ... [2021-12-21 11:48:41,094 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:41" (1/1) ... [2021-12-21 11:48:41,111 INFO L137 Inliner]: procedures = 16, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2021-12-21 11:48:41,111 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 11:48:41,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 11:48:41,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 11:48:41,112 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 11:48:41,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:41" (1/1) ... [2021-12-21 11:48:41,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:41" (1/1) ... [2021-12-21 11:48:41,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:41" (1/1) ... [2021-12-21 11:48:41,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:41" (1/1) ... [2021-12-21 11:48:41,136 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:41" (1/1) ... [2021-12-21 11:48:41,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:41" (1/1) ... [2021-12-21 11:48:41,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:41" (1/1) ... [2021-12-21 11:48:41,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 11:48:41,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 11:48:41,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 11:48:41,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 11:48:41,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:41" (1/1) ... [2021-12-21 11:48:41,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:48:41,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:48:41,172 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 11:48:41,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 11:48:41,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 11:48:41,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-21 11:48:41,201 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 11:48:41,201 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 11:48:41,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 11:48:41,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 11:48:41,253 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 11:48:41,255 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 11:48:43,585 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 11:48:43,589 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 11:48:43,589 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 11:48:43,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:48:43 BoogieIcfgContainer [2021-12-21 11:48:43,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 11:48:43,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 11:48:43,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 11:48:43,594 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 11:48:43,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:48:40" (1/3) ... [2021-12-21 11:48:43,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4febc766 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:48:43, skipping insertion in model container [2021-12-21 11:48:43,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:48:41" (2/3) ... [2021-12-21 11:48:43,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4febc766 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:48:43, skipping insertion in model container [2021-12-21 11:48:43,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:48:43" (3/3) ... [2021-12-21 11:48:43,597 INFO L111 eAbstractionObserver]: Analyzing ICFG filter2_reinit.c [2021-12-21 11:48:43,600 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 11:48:43,600 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 11:48:43,629 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 11:48:43,635 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 11:48:43,635 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 11:48:43,655 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 11:48:43,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-21 11:48:43,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:48:43,658 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:48:43,659 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:48:43,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:48:43,664 INFO L85 PathProgramCache]: Analyzing trace with hash 526466326, now seen corresponding path program 1 times [2021-12-21 11:48:43,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 11:48:43,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1053613700] [2021-12-21 11:48:43,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:48:43,677 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 11:48:43,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 11:48:43,679 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 11:48:43,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-21 11:48:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:48:44,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-21 11:48:44,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:48:45,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-21 11:48:45,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:48:45,038 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 11:48:45,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1053613700] [2021-12-21 11:48:45,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1053613700] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:48:45,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:48:45,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:48:45,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670339854] [2021-12-21 11:48:45,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:48:45,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 11:48:45,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 11:48:45,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 11:48:45,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 11:48:45,070 INFO L87 Difference]: Start difference. First operand has 22 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 11:48:45,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:48:45,083 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2021-12-21 11:48:45,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 11:48:45,085 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-12-21 11:48:45,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:48:45,090 INFO L225 Difference]: With dead ends: 41 [2021-12-21 11:48:45,090 INFO L226 Difference]: Without dead ends: 18 [2021-12-21 11:48:45,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 11:48:45,096 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:48:45,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 11:48:45,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-21 11:48:45,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-21 11:48:45,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 11:48:45,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-12-21 11:48:45,127 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 23 [2021-12-21 11:48:45,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:48:45,127 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-12-21 11:48:45,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 11:48:45,128 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-12-21 11:48:45,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-21 11:48:45,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:48:45,129 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:48:45,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-21 11:48:45,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 11:48:45,348 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:48:45,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:48:45,348 INFO L85 PathProgramCache]: Analyzing trace with hash -398587304, now seen corresponding path program 1 times [2021-12-21 11:48:45,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 11:48:45,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [815197770] [2021-12-21 11:48:45,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:48:45,349 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 11:48:45,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 11:48:45,350 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 11:48:45,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-21 11:49:39,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:49:39,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 11:49:39,583 INFO L286 TraceCheckSpWp]: Computing forward predicates...