./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invariants/mod4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/loop-invariants/mod4.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 78a0c24aec4481c7f7921f4597a2470b78929a6691a425a752074aa853d4d524 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 02:57:56,556 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 02:57:56,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 02:57:56,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 02:57:56,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 02:57:56,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 02:57:56,595 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 02:57:56,597 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 02:57:56,599 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 02:57:56,602 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 02:57:56,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 02:57:56,608 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 02:57:56,608 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 02:57:56,609 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 02:57:56,610 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 02:57:56,614 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 02:57:56,615 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 02:57:56,616 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 02:57:56,617 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 02:57:56,622 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 02:57:56,623 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 02:57:56,624 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 02:57:56,625 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 02:57:56,626 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 02:57:56,627 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 02:57:56,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 02:57:56,632 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 02:57:56,632 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 02:57:56,633 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 02:57:56,633 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 02:57:56,634 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 02:57:56,634 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 02:57:56,636 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 02:57:56,636 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 02:57:56,637 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 02:57:56,638 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 02:57:56,638 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 02:57:56,638 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 02:57:56,639 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 02:57:56,639 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 02:57:56,639 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 02:57:56,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 02:57:56,647 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 02:57:56,672 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 02:57:56,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 02:57:56,673 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 02:57:56,673 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 02:57:56,673 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 02:57:56,674 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 02:57:56,674 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 02:57:56,674 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 02:57:56,675 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 02:57:56,675 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 02:57:56,676 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 02:57:56,676 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 02:57:56,676 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 02:57:56,676 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 02:57:56,676 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 02:57:56,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 02:57:56,677 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 02:57:56,677 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 02:57:56,677 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 02:57:56,677 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 02:57:56,677 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 02:57:56,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 02:57:56,677 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 02:57:56,678 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 02:57:56,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:57:56,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 02:57:56,678 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 02:57:56,678 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 02:57:56,678 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 02:57:56,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 02:57:56,679 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 02:57:56,679 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 02:57:56,679 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 02:57:56,679 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78a0c24aec4481c7f7921f4597a2470b78929a6691a425a752074aa853d4d524 [2022-07-21 02:57:56,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 02:57:56,943 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 02:57:56,945 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 02:57:56,946 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 02:57:56,955 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 02:57:56,957 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invariants/mod4.c [2022-07-21 02:57:57,010 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c84cddb8f/503be4a6497f4413838739b9915cd2a6/FLAG6e16ddd1d [2022-07-21 02:57:57,363 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 02:57:57,364 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invariants/mod4.c [2022-07-21 02:57:57,375 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c84cddb8f/503be4a6497f4413838739b9915cd2a6/FLAG6e16ddd1d [2022-07-21 02:57:57,390 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c84cddb8f/503be4a6497f4413838739b9915cd2a6 [2022-07-21 02:57:57,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 02:57:57,393 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 02:57:57,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 02:57:57,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 02:57:57,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 02:57:57,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:57:57" (1/1) ... [2022-07-21 02:57:57,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1465d48b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:57:57, skipping insertion in model container [2022-07-21 02:57:57,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:57:57" (1/1) ... [2022-07-21 02:57:57,403 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 02:57:57,413 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 02:57:57,531 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/loop-invariants/mod4.c[351,364] [2022-07-21 02:57:57,540 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:57:57,547 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 02:57:57,562 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/loop-invariants/mod4.c[351,364] [2022-07-21 02:57:57,584 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:57:57,593 INFO L208 MainTranslator]: Completed translation [2022-07-21 02:57:57,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:57:57 WrapperNode [2022-07-21 02:57:57,593 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 02:57:57,595 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 02:57:57,595 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 02:57:57,595 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 02:57:57,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:57:57" (1/1) ... [2022-07-21 02:57:57,604 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:57:57" (1/1) ... [2022-07-21 02:57:57,617 INFO L137 Inliner]: procedures = 13, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 35 [2022-07-21 02:57:57,618 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 02:57:57,618 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 02:57:57,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 02:57:57,619 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 02:57:57,623 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:57:57" (1/1) ... [2022-07-21 02:57:57,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:57:57" (1/1) ... [2022-07-21 02:57:57,631 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:57:57" (1/1) ... [2022-07-21 02:57:57,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:57:57" (1/1) ... [2022-07-21 02:57:57,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:57:57" (1/1) ... [2022-07-21 02:57:57,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:57:57" (1/1) ... [2022-07-21 02:57:57,647 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:57:57" (1/1) ... [2022-07-21 02:57:57,648 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 02:57:57,650 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 02:57:57,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 02:57:57,651 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 02:57:57,651 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:57:57" (1/1) ... [2022-07-21 02:57:57,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:57:57,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:57:57,673 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) [2022-07-21 02:57:57,682 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 [2022-07-21 02:57:57,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 02:57:57,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 02:57:57,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 02:57:57,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 02:57:57,744 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 02:57:57,745 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 02:57:57,829 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 02:57:57,834 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 02:57:57,834 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-21 02:57:57,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:57:57 BoogieIcfgContainer [2022-07-21 02:57:57,836 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 02:57:57,837 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 02:57:57,837 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 02:57:57,839 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 02:57:57,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:57:57" (1/3) ... [2022-07-21 02:57:57,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46fa08c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:57:57, skipping insertion in model container [2022-07-21 02:57:57,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:57:57" (2/3) ... [2022-07-21 02:57:57,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46fa08c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:57:57, skipping insertion in model container [2022-07-21 02:57:57,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:57:57" (3/3) ... [2022-07-21 02:57:57,842 INFO L111 eAbstractionObserver]: Analyzing ICFG mod4.c [2022-07-21 02:57:57,851 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 02:57:57,852 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 02:57:57,899 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 02:57:57,906 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@12e197be, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4f052761 [2022-07-21 02:57:57,906 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 02:57:57,909 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 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) [2022-07-21 02:57:57,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 02:57:57,913 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:57:57,913 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 02:57:57,914 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:57:57,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:57:57,919 INFO L85 PathProgramCache]: Analyzing trace with hash 889783783, now seen corresponding path program 1 times [2022-07-21 02:57:57,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:57:57,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74251959] [2022-07-21 02:57:57,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:57:57,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:57:57,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:57:58,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:57:58,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:57:58,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74251959] [2022-07-21 02:57:58,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74251959] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:57:58,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:57:58,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 02:57:58,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875011117] [2022-07-21 02:57:58,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:57:58,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 02:57:58,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:57:58,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 02:57:58,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 02:57:58,042 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2022-07-21 02:57:58,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:57:58,052 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2022-07-21 02:57:58,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 02:57:58,053 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2022-07-21 02:57:58,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:57:58,058 INFO L225 Difference]: With dead ends: 20 [2022-07-21 02:57:58,059 INFO L226 Difference]: Without dead ends: 8 [2022-07-21 02:57:58,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 02:57:58,064 INFO L413 NwaCegarLoop]: 12 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, 12 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 [2022-07-21 02:57:58,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:57:58,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-07-21 02:57:58,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-07-21 02:57:58,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 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) [2022-07-21 02:57:58,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2022-07-21 02:57:58,085 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2022-07-21 02:57:58,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:57:58,085 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2022-07-21 02:57:58,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2022-07-21 02:57:58,086 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2022-07-21 02:57:58,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 02:57:58,087 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:57:58,087 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:57:58,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 02:57:58,087 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:57:58,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:57:58,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1806847180, now seen corresponding path program 1 times [2022-07-21 02:57:58,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:57:58,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315785769] [2022-07-21 02:57:58,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:57:58,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:57:58,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:57:58,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:57:58,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:57:58,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315785769] [2022-07-21 02:57:58,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315785769] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:57:58,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:57:58,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 02:57:58,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351422559] [2022-07-21 02:57:58,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:57:58,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 02:57:58,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:57:58,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 02:57:58,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 02:57:58,176 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-07-21 02:57:58,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:57:58,196 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2022-07-21 02:57:58,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 02:57:58,197 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2022-07-21 02:57:58,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:57:58,197 INFO L225 Difference]: With dead ends: 14 [2022-07-21 02:57:58,197 INFO L226 Difference]: Without dead ends: 10 [2022-07-21 02:57:58,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 02:57:58,199 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:57:58,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 16 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:57:58,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-07-21 02:57:58,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-07-21 02:57:58,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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) [2022-07-21 02:57:58,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2022-07-21 02:57:58,202 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2022-07-21 02:57:58,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:57:58,202 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2022-07-21 02:57:58,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-07-21 02:57:58,202 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2022-07-21 02:57:58,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 02:57:58,203 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:57:58,203 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:57:58,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 02:57:58,203 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:57:58,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:57:58,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1262026695, now seen corresponding path program 1 times [2022-07-21 02:57:58,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:57:58,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553187997] [2022-07-21 02:57:58,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:57:58,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:57:58,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:57:58,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:57:58,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:57:58,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553187997] [2022-07-21 02:57:58,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553187997] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:57:58,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292832108] [2022-07-21 02:57:58,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:57:58,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:57:58,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:57:58,322 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) [2022-07-21 02:57:58,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 02:57:58,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:57:58,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 02:57:58,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:57:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:57:58,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:57:58,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 02:57:58,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292832108] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 02:57:58,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 02:57:58,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2022-07-21 02:57:58,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910284206] [2022-07-21 02:57:58,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:57:58,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 02:57:58,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:57:58,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 02:57:58,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-21 02:57:58,489 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-07-21 02:57:58,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:57:58,509 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2022-07-21 02:57:58,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 02:57:58,510 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 9 [2022-07-21 02:57:58,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:57:58,510 INFO L225 Difference]: With dead ends: 10 [2022-07-21 02:57:58,511 INFO L226 Difference]: Without dead ends: 0 [2022-07-21 02:57:58,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-21 02:57:58,514 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:57:58,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 9 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:57:58,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-21 02:57:58,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-21 02:57:58,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2022-07-21 02:57:58,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-21 02:57:58,516 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2022-07-21 02:57:58,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:57:58,516 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-21 02:57:58,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-07-21 02:57:58,516 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-21 02:57:58,516 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-21 02:57:58,518 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-21 02:57:58,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 02:57:58,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:57:58,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-21 02:57:58,741 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-07-21 02:57:58,741 INFO L902 garLoopResultBuilder]: At program point L17(lines 11 18) the Hoare annotation is: true [2022-07-21 02:57:58,741 INFO L899 garLoopResultBuilder]: For program point L13-1(lines 13 15) no Hoare annotation was computed. [2022-07-21 02:57:58,741 INFO L895 garLoopResultBuilder]: At program point L13-3(lines 13 15) the Hoare annotation is: (= (mod |ULTIMATE.start_main_~x~0#1| 4) 0) [2022-07-21 02:57:58,741 INFO L899 garLoopResultBuilder]: For program point L13-4(lines 13 15) no Hoare annotation was computed. [2022-07-21 02:57:58,741 INFO L899 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2022-07-21 02:57:58,741 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-07-21 02:57:58,742 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-07-21 02:57:58,742 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-07-21 02:57:58,742 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2022-07-21 02:57:58,742 INFO L899 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2022-07-21 02:57:58,742 INFO L902 garLoopResultBuilder]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2022-07-21 02:57:58,744 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-21 02:57:58,747 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-21 02:57:58,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 02:57:58 BoogieIcfgContainer [2022-07-21 02:57:58,756 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-21 02:57:58,756 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-21 02:57:58,756 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-21 02:57:58,756 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-21 02:57:58,757 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:57:57" (3/4) ... [2022-07-21 02:57:58,758 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-21 02:57:58,764 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2022-07-21 02:57:58,764 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-07-21 02:57:58,764 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-07-21 02:57:58,765 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-21 02:57:58,765 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-21 02:57:58,784 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-21 02:57:58,785 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-21 02:57:58,785 INFO L158 Benchmark]: Toolchain (without parser) took 1392.52ms. Allocated memory was 60.8MB in the beginning and 73.4MB in the end (delta: 12.6MB). Free memory was 45.0MB in the beginning and 47.8MB in the end (delta: -2.8MB). Peak memory consumption was 9.1MB. Max. memory is 16.1GB. [2022-07-21 02:57:58,787 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 48.2MB. Free memory was 30.0MB in the beginning and 30.0MB in the end (delta: 32.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 02:57:58,788 INFO L158 Benchmark]: CACSL2BoogieTranslator took 199.27ms. Allocated memory is still 60.8MB. Free memory was 44.7MB in the beginning and 44.1MB in the end (delta: 565.3kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-21 02:57:58,788 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.37ms. Allocated memory is still 60.8MB. Free memory was 44.1MB in the beginning and 42.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 02:57:58,789 INFO L158 Benchmark]: Boogie Preprocessor took 30.65ms. Allocated memory is still 60.8MB. Free memory was 42.8MB in the beginning and 41.8MB in the end (delta: 978.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 02:57:58,789 INFO L158 Benchmark]: RCFGBuilder took 186.07ms. Allocated memory is still 60.8MB. Free memory was 41.6MB in the beginning and 33.4MB in the end (delta: 8.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-21 02:57:58,791 INFO L158 Benchmark]: TraceAbstraction took 919.04ms. Allocated memory was 60.8MB in the beginning and 73.4MB in the end (delta: 12.6MB). Free memory was 33.0MB in the beginning and 50.3MB in the end (delta: -17.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 02:57:58,792 INFO L158 Benchmark]: Witness Printer took 28.55ms. Allocated memory is still 73.4MB. Free memory was 49.9MB in the beginning and 47.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 02:57:58,794 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 48.2MB. Free memory was 30.0MB in the beginning and 30.0MB in the end (delta: 32.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 199.27ms. Allocated memory is still 60.8MB. Free memory was 44.7MB in the beginning and 44.1MB in the end (delta: 565.3kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.37ms. Allocated memory is still 60.8MB. Free memory was 44.1MB in the beginning and 42.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 30.65ms. Allocated memory is still 60.8MB. Free memory was 42.8MB in the beginning and 41.8MB in the end (delta: 978.5kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 186.07ms. Allocated memory is still 60.8MB. Free memory was 41.6MB in the beginning and 33.4MB in the end (delta: 8.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 919.04ms. Allocated memory was 60.8MB in the beginning and 73.4MB in the end (delta: 12.6MB). Free memory was 33.0MB in the beginning and 50.3MB in the end (delta: -17.2MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 28.55ms. Allocated memory is still 73.4MB. Free memory was 49.9MB in the beginning and 47.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. 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 - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.9s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2 mSDsluCounter, 37 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 15 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10 IncrementalHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 22 mSDtfsCounter, 10 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, InterpolantAutomatonStates: 10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 6 NumberOfFragments, 7 HoareAnnotationTreeSize, 3 FomulaSimplifications, 10 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 31 NumberOfCodeBlocks, 31 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 35 ConstructedInterpolants, 0 QuantifiedInterpolants, 121 SizeOfPredicates, 2 NumberOfNonLiveVariables, 57 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 2/6 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: x % 4 == 0 RESULT: Ultimate proved your program to be correct! [2022-07-21 02:57:58,863 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 Writing output log to file Ultimate.log Result: TRUE