./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/ifcompf.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec 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/array-fpi/ifcompf.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 92985165ddadd5833b6dd8db60f80f6054278511 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-25 19:06:14,546 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-25 19:06:14,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-25 19:06:14,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-25 19:06:14,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-25 19:06:14,567 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-25 19:06:14,568 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-25 19:06:14,570 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-25 19:06:14,571 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-25 19:06:14,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-25 19:06:14,572 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-25 19:06:14,573 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-25 19:06:14,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-25 19:06:14,574 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-25 19:06:14,575 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-25 19:06:14,576 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-25 19:06:14,577 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-25 19:06:14,577 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-25 19:06:14,578 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-25 19:06:14,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-25 19:06:14,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-25 19:06:14,581 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-25 19:06:14,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-25 19:06:14,583 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-25 19:06:14,584 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-25 19:06:14,585 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-25 19:06:14,585 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-25 19:06:14,586 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-25 19:06:14,586 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-25 19:06:14,586 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-25 19:06:14,587 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-25 19:06:14,587 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-25 19:06:14,588 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-25 19:06:14,588 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-25 19:06:14,589 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-25 19:06:14,589 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-25 19:06:14,590 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-25 19:06:14,590 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-25 19:06:14,590 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-25 19:06:14,591 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-25 19:06:14,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-25 19:06:14,592 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-25 19:06:14,606 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-25 19:06:14,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-25 19:06:14,607 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-25 19:06:14,607 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-25 19:06:14,608 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-25 19:06:14,608 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-25 19:06:14,608 INFO L138 SettingsManager]: * Use SBE=true [2021-08-25 19:06:14,608 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-25 19:06:14,608 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-25 19:06:14,609 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-25 19:06:14,609 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-25 19:06:14,609 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-25 19:06:14,609 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-25 19:06:14,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-25 19:06:14,609 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-25 19:06:14,610 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-25 19:06:14,610 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-25 19:06:14,610 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-25 19:06:14,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-25 19:06:14,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-25 19:06:14,610 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-25 19:06:14,610 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-25 19:06:14,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 19:06:14,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-25 19:06:14,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-25 19:06:14,621 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-25 19:06:14,621 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-25 19:06:14,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-25 19:06:14,621 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-25 19:06:14,622 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-25 19:06:14,622 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 92985165ddadd5833b6dd8db60f80f6054278511 [2021-08-25 19:06:14,864 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-25 19:06:14,885 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-25 19:06:14,887 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-25 19:06:14,888 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-25 19:06:14,889 INFO L275 PluginConnector]: CDTParser initialized [2021-08-25 19:06:14,889 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ifcompf.c [2021-08-25 19:06:14,948 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba315bbc0/15f869a29b664a578f2b1cbc97725592/FLAG32115ca97 [2021-08-25 19:06:15,267 INFO L306 CDTParser]: Found 1 translation units. [2021-08-25 19:06:15,267 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifcompf.c [2021-08-25 19:06:15,272 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba315bbc0/15f869a29b664a578f2b1cbc97725592/FLAG32115ca97 [2021-08-25 19:06:15,280 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba315bbc0/15f869a29b664a578f2b1cbc97725592 [2021-08-25 19:06:15,282 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-25 19:06:15,283 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-25 19:06:15,284 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-25 19:06:15,285 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-25 19:06:15,287 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-25 19:06:15,287 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:06:15" (1/1) ... [2021-08-25 19:06:15,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e3b1835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:06:15, skipping insertion in model container [2021-08-25 19:06:15,288 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:06:15" (1/1) ... [2021-08-25 19:06:15,293 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-25 19:06:15,302 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-25 19:06:15,428 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifcompf.c[590,603] [2021-08-25 19:06:15,461 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:06:15,467 INFO L203 MainTranslator]: Completed pre-run [2021-08-25 19:06:15,484 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifcompf.c[590,603] [2021-08-25 19:06:15,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:06:15,514 INFO L208 MainTranslator]: Completed translation [2021-08-25 19:06:15,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:06:15 WrapperNode [2021-08-25 19:06:15,516 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-25 19:06:15,517 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-25 19:06:15,517 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-25 19:06:15,517 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-25 19:06:15,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:06:15" (1/1) ... [2021-08-25 19:06:15,533 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:06:15" (1/1) ... [2021-08-25 19:06:15,553 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-25 19:06:15,554 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-25 19:06:15,554 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-25 19:06:15,554 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-25 19:06:15,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:06:15" (1/1) ... [2021-08-25 19:06:15,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:06:15" (1/1) ... [2021-08-25 19:06:15,564 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:06:15" (1/1) ... [2021-08-25 19:06:15,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:06:15" (1/1) ... [2021-08-25 19:06:15,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:06:15" (1/1) ... [2021-08-25 19:06:15,582 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:06:15" (1/1) ... [2021-08-25 19:06:15,586 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:06:15" (1/1) ... [2021-08-25 19:06:15,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-25 19:06:15,591 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-25 19:06:15,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-25 19:06:15,592 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-25 19:06:15,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:06:15" (1/1) ... [2021-08-25 19:06:15,598 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 19:06:15,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:06:15,618 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) [2021-08-25 19:06:15,638 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 [2021-08-25 19:06:15,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-25 19:06:15,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-25 19:06:15,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-25 19:06:15,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-25 19:06:15,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-25 19:06:15,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-25 19:06:15,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-25 19:06:15,912 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-25 19:06:15,912 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-08-25 19:06:15,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:06:15 BoogieIcfgContainer [2021-08-25 19:06:15,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-25 19:06:15,914 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-25 19:06:15,920 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-25 19:06:15,922 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-25 19:06:15,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 07:06:15" (1/3) ... [2021-08-25 19:06:15,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@689625b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:06:15, skipping insertion in model container [2021-08-25 19:06:15,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:06:15" (2/3) ... [2021-08-25 19:06:15,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@689625b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:06:15, skipping insertion in model container [2021-08-25 19:06:15,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:06:15" (3/3) ... [2021-08-25 19:06:15,925 INFO L111 eAbstractionObserver]: Analyzing ICFG ifcompf.c [2021-08-25 19:06:15,944 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-25 19:06:15,944 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-25 19:06:15,976 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-25 19:06:15,980 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-08-25 19:06:15,982 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-25 19:06:15,991 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:06:15,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-25 19:06:15,995 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:06:15,996 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:06:15,997 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:06:16,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:06:16,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1152450264, now seen corresponding path program 1 times [2021-08-25 19:06:16,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:06:16,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593699371] [2021-08-25 19:06:16,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:06:16,011 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:06:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:06:16,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:06:16,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:06:16,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593699371] [2021-08-25 19:06:16,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593699371] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:06:16,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:06:16,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-25 19:06:16,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613589142] [2021-08-25 19:06:16,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-25 19:06:16,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:06:16,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-25 19:06:16,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 19:06:16,150 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:06:16,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:06:16,162 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2021-08-25 19:06:16,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-25 19:06:16,163 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-25 19:06:16,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:06:16,168 INFO L225 Difference]: With dead ends: 50 [2021-08-25 19:06:16,168 INFO L226 Difference]: Without dead ends: 23 [2021-08-25 19:06:16,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 19:06:16,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-08-25 19:06:16,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-08-25 19:06:16,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:06:16,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-08-25 19:06:16,194 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 14 [2021-08-25 19:06:16,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:06:16,194 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-08-25 19:06:16,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:06:16,195 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-08-25 19:06:16,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-25 19:06:16,195 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:06:16,196 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:06:16,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-25 19:06:16,196 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:06:16,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:06:16,199 INFO L82 PathProgramCache]: Analyzing trace with hash 670750212, now seen corresponding path program 1 times [2021-08-25 19:06:16,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:06:16,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360279142] [2021-08-25 19:06:16,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:06:16,200 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:06:16,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:06:16,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:06:16,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:06:16,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360279142] [2021-08-25 19:06:16,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360279142] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:06:16,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:06:16,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-25 19:06:16,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259699205] [2021-08-25 19:06:16,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-25 19:06:16,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:06:16,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-25 19:06:16,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 19:06:16,299 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:06:16,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:06:16,419 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2021-08-25 19:06:16,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-25 19:06:16,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-25 19:06:16,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:06:16,421 INFO L225 Difference]: With dead ends: 56 [2021-08-25 19:06:16,421 INFO L226 Difference]: Without dead ends: 38 [2021-08-25 19:06:16,422 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 19:06:16,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-08-25 19:06:16,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2021-08-25 19:06:16,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:06:16,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-08-25 19:06:16,438 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 14 [2021-08-25 19:06:16,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:06:16,438 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-08-25 19:06:16,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:06:16,438 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-08-25 19:06:16,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-25 19:06:16,439 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:06:16,439 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:06:16,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-25 19:06:16,440 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:06:16,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:06:16,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1978137699, now seen corresponding path program 1 times [2021-08-25 19:06:16,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:06:16,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13595742] [2021-08-25 19:06:16,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:06:16,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:06:16,457 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:06:16,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1532749044] [2021-08-25 19:06:16,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:06:16,457 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:06:16,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:06:16,459 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:06:16,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-25 19:06:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:06:16,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-25 19:06:16,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:06:16,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-25 19:06:16,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-25 19:06:16,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:06:16,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13595742] [2021-08-25 19:06:16,834 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:06:16,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532749044] [2021-08-25 19:06:16,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532749044] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:06:16,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:06:16,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-25 19:06:16,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237773902] [2021-08-25 19:06:16,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-25 19:06:16,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:06:16,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-25 19:06:16,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-25 19:06:16,836 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:06:16,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:06:16,910 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-08-25 19:06:16,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-25 19:06:16,911 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-25 19:06:16,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:06:16,913 INFO L225 Difference]: With dead ends: 37 [2021-08-25 19:06:16,913 INFO L226 Difference]: Without dead ends: 35 [2021-08-25 19:06:16,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-25 19:06:16,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-08-25 19:06:16,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2021-08-25 19:06:16,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:06:16,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2021-08-25 19:06:16,924 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 23 [2021-08-25 19:06:16,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:06:16,924 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2021-08-25 19:06:16,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:06:16,925 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2021-08-25 19:06:16,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-25 19:06:16,926 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:06:16,926 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:06:16,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-25 19:06:17,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:06:17,141 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:06:17,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:06:17,141 INFO L82 PathProgramCache]: Analyzing trace with hash -100913581, now seen corresponding path program 1 times [2021-08-25 19:06:17,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:06:17,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700588087] [2021-08-25 19:06:17,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:06:17,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:06:17,158 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:06:17,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1148140113] [2021-08-25 19:06:17,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:06:17,158 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:06:17,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:06:17,159 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:06:17,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-25 19:06:17,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:06:17,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-25 19:06:17,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:06:17,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-25 19:06:17,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:06:17,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700588087] [2021-08-25 19:06:17,435 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:06:17,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148140113] [2021-08-25 19:06:17,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148140113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:06:17,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:06:17,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-25 19:06:17,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13507947] [2021-08-25 19:06:17,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-25 19:06:17,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:06:17,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-25 19:06:17,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:06:17,438 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:06:17,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:06:17,587 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2021-08-25 19:06:17,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-25 19:06:17,588 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-25 19:06:17,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:06:17,589 INFO L225 Difference]: With dead ends: 87 [2021-08-25 19:06:17,589 INFO L226 Difference]: Without dead ends: 51 [2021-08-25 19:06:17,590 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-25 19:06:17,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-25 19:06:17,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 37. [2021-08-25 19:06:17,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:06:17,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-08-25 19:06:17,600 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2021-08-25 19:06:17,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:06:17,600 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-08-25 19:06:17,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:06:17,600 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-08-25 19:06:17,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-25 19:06:17,601 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:06:17,602 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:06:17,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-25 19:06:17,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-25 19:06:17,813 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:06:17,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:06:17,813 INFO L82 PathProgramCache]: Analyzing trace with hash -2051071008, now seen corresponding path program 1 times [2021-08-25 19:06:17,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:06:17,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984246856] [2021-08-25 19:06:17,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:06:17,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:06:17,826 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:06:17,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [632876474] [2021-08-25 19:06:17,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:06:17,826 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:06:17,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:06:17,827 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:06:17,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-25 19:06:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:06:17,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-25 19:06:17,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:06:17,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-08-25 19:06:18,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-25 19:06:18,243 INFO L354 Elim1Store]: treesize reduction 158, result has 21.0 percent of original size [2021-08-25 19:06:18,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 65 [2021-08-25 19:06:18,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-08-25 19:06:18,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:18,498 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-25 19:06:18,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2021-08-25 19:06:18,714 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-25 19:06:18,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:06:18,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984246856] [2021-08-25 19:06:18,715 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:06:18,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632876474] [2021-08-25 19:06:18,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632876474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:06:18,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:06:18,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-08-25 19:06:18,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881592526] [2021-08-25 19:06:18,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-25 19:06:18,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:06:18,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-25 19:06:18,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-25 19:06:18,716 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:06:19,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:06:19,164 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2021-08-25 19:06:19,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-25 19:06:19,164 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-25 19:06:19,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:06:19,165 INFO L225 Difference]: With dead ends: 68 [2021-08-25 19:06:19,165 INFO L226 Difference]: Without dead ends: 46 [2021-08-25 19:06:19,166 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 390.9ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-08-25 19:06:19,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-25 19:06:19,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2021-08-25 19:06:19,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:06:19,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-08-25 19:06:19,169 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 36 [2021-08-25 19:06:19,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:06:19,169 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-08-25 19:06:19,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:06:19,169 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-08-25 19:06:19,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-25 19:06:19,170 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:06:19,170 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:06:19,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-25 19:06:19,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:06:19,387 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:06:19,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:06:19,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1866238698, now seen corresponding path program 2 times [2021-08-25 19:06:19,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:06:19,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158265906] [2021-08-25 19:06:19,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:06:19,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:06:19,399 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:06:19,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964049668] [2021-08-25 19:06:19,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 19:06:19,400 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:06:19,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:06:19,400 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:06:19,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-25 19:06:19,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 19:06:19,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:06:19,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 19:06:19,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:06:19,694 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-25 19:06:19,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:06:19,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158265906] [2021-08-25 19:06:19,694 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:06:19,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964049668] [2021-08-25 19:06:19,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964049668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:06:19,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:06:19,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-25 19:06:19,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880020641] [2021-08-25 19:06:19,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-25 19:06:19,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:06:19,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-25 19:06:19,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-25 19:06:19,697 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:06:19,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:06:19,824 INFO L93 Difference]: Finished difference Result 116 states and 129 transitions. [2021-08-25 19:06:19,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-25 19:06:19,825 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-25 19:06:19,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:06:19,826 INFO L225 Difference]: With dead ends: 116 [2021-08-25 19:06:19,826 INFO L226 Difference]: Without dead ends: 64 [2021-08-25 19:06:19,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-25 19:06:19,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-25 19:06:19,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 50. [2021-08-25 19:06:19,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:06:19,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2021-08-25 19:06:19,830 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 40 [2021-08-25 19:06:19,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:06:19,830 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2021-08-25 19:06:19,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:06:19,830 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2021-08-25 19:06:19,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-25 19:06:19,831 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:06:19,831 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:06:19,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-25 19:06:20,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:06:20,045 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:06:20,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:06:20,045 INFO L82 PathProgramCache]: Analyzing trace with hash 132233513, now seen corresponding path program 3 times [2021-08-25 19:06:20,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:06:20,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902725188] [2021-08-25 19:06:20,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:06:20,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:06:20,059 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:06:20,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1043612599] [2021-08-25 19:06:20,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 19:06:20,059 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:06:20,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:06:20,060 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:06:20,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-25 19:06:20,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-25 19:06:20,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-08-25 19:06:20,221 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-25 19:06:20,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-25 19:06:20,284 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-25 19:06:20,285 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-25 19:06:20,285 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 19:06:20,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-25 19:06:20,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:06:20,505 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-25 19:06:20,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.08 07:06:20 BoogieIcfgContainer [2021-08-25 19:06:20,557 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-25 19:06:20,557 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-25 19:06:20,557 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-25 19:06:20,557 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-25 19:06:20,557 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:06:15" (3/4) ... [2021-08-25 19:06:20,561 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-25 19:06:20,602 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-25 19:06:20,602 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-25 19:06:20,603 INFO L168 Benchmark]: Toolchain (without parser) took 5319.47 ms. Allocated memory was 77.6 MB in the beginning and 113.2 MB in the end (delta: 35.7 MB). Free memory was 43.8 MB in the beginning and 61.0 MB in the end (delta: -17.2 MB). Peak memory consumption was 20.1 MB. Max. memory is 16.1 GB. [2021-08-25 19:06:20,603 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 77.6 MB. Free memory was 60.3 MB in the beginning and 60.2 MB in the end (delta: 72.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:06:20,603 INFO L168 Benchmark]: CACSL2BoogieTranslator took 231.84 ms. Allocated memory is still 77.6 MB. Free memory was 43.6 MB in the beginning and 60.8 MB in the end (delta: -17.2 MB). Peak memory consumption was 6.4 MB. Max. memory is 16.1 GB. [2021-08-25 19:06:20,604 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.85 ms. Allocated memory is still 77.6 MB. Free memory was 60.8 MB in the beginning and 59.2 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:06:20,604 INFO L168 Benchmark]: Boogie Preprocessor took 35.75 ms. Allocated memory is still 77.6 MB. Free memory was 59.2 MB in the beginning and 57.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 19:06:20,604 INFO L168 Benchmark]: RCFGBuilder took 322.15 ms. Allocated memory is still 77.6 MB. Free memory was 57.9 MB in the beginning and 40.7 MB in the end (delta: 17.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-08-25 19:06:20,605 INFO L168 Benchmark]: TraceAbstraction took 4642.39 ms. Allocated memory was 77.6 MB in the beginning and 113.2 MB in the end (delta: 35.7 MB). Free memory was 40.1 MB in the beginning and 66.2 MB in the end (delta: -26.1 MB). Peak memory consumption was 11.6 MB. Max. memory is 16.1 GB. [2021-08-25 19:06:20,605 INFO L168 Benchmark]: Witness Printer took 45.31 ms. Allocated memory is still 113.2 MB. Free memory was 66.2 MB in the beginning and 61.0 MB in the end (delta: 5.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-08-25 19:06:20,607 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 77.6 MB. Free memory was 60.3 MB in the beginning and 60.2 MB in the end (delta: 72.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 231.84 ms. Allocated memory is still 77.6 MB. Free memory was 43.6 MB in the beginning and 60.8 MB in the end (delta: -17.2 MB). Peak memory consumption was 6.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.85 ms. Allocated memory is still 77.6 MB. Free memory was 60.8 MB in the beginning and 59.2 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.75 ms. Allocated memory is still 77.6 MB. Free memory was 59.2 MB in the beginning and 57.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 322.15 ms. Allocated memory is still 77.6 MB. Free memory was 57.9 MB in the beginning and 40.7 MB in the end (delta: 17.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4642.39 ms. Allocated memory was 77.6 MB in the beginning and 113.2 MB in the end (delta: 35.7 MB). Free memory was 40.1 MB in the beginning and 66.2 MB in the end (delta: -26.1 MB). Peak memory consumption was 11.6 MB. Max. memory is 16.1 GB. * Witness Printer took 45.31 ms. Allocated memory is still 113.2 MB. Free memory was 66.2 MB in the beginning and 61.0 MB in the end (delta: 5.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=3] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L30] long long *c = malloc(sizeof(long long)*N); [L32] i=0 VAL [N=3] [L32] COND TRUE i