./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/gcd_4+newton_2_5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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/combinations/gcd_4+newton_2_5.i -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 8402c5691f7146360213fdb1e8b03143db0d7add581e1f213f9dfbebb48edc07 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 02:11:33,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 02:11:33,944 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 02:11:33,990 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 02:11:33,994 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 02:11:33,997 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 02:11:33,999 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 02:11:34,005 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 02:11:34,007 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 02:11:34,013 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 02:11:34,014 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 02:11:34,018 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 02:11:34,019 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 02:11:34,021 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 02:11:34,022 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 02:11:34,024 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 02:11:34,026 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 02:11:34,026 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 02:11:34,031 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 02:11:34,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 02:11:34,037 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 02:11:34,038 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 02:11:34,039 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 02:11:34,040 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 02:11:34,042 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 02:11:34,044 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 02:11:34,044 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 02:11:34,045 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 02:11:34,046 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 02:11:34,047 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 02:11:34,047 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 02:11:34,047 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 02:11:34,049 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 02:11:34,049 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 02:11:34,051 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 02:11:34,051 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 02:11:34,051 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 02:11:34,052 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 02:11:34,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 02:11:34,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 02:11:34,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 02:11:34,055 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 02:11:34,089 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 02:11:34,089 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 02:11:34,091 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 02:11:34,091 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 02:11:34,092 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 02:11:34,092 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 02:11:34,093 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 02:11:34,093 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 02:11:34,093 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 02:11:34,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 02:11:34,094 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 02:11:34,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 02:11:34,095 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 02:11:34,095 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 02:11:34,095 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 02:11:34,095 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 02:11:34,095 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 02:11:34,095 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 02:11:34,096 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 02:11:34,096 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 02:11:34,096 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 02:11:34,096 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 02:11:34,096 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 02:11:34,097 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 02:11:34,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:11:34,097 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 02:11:34,097 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 02:11:34,097 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 02:11:34,097 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 02:11:34,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 02:11:34,098 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 02:11:34,098 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 02:11:34,098 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 02:11:34,099 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8402c5691f7146360213fdb1e8b03143db0d7add581e1f213f9dfbebb48edc07 [2021-12-28 02:11:34,397 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 02:11:34,424 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 02:11:34,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 02:11:34,427 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 02:11:34,428 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 02:11:34,429 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_4+newton_2_5.i [2021-12-28 02:11:34,491 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ac002796/ea86680191034f39b40efffd4af95c72/FLAGfa0634433 [2021-12-28 02:11:34,950 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 02:11:34,951 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_2_5.i [2021-12-28 02:11:34,958 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ac002796/ea86680191034f39b40efffd4af95c72/FLAGfa0634433 [2021-12-28 02:11:35,309 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ac002796/ea86680191034f39b40efffd4af95c72 [2021-12-28 02:11:35,314 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 02:11:35,317 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 02:11:35,319 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 02:11:35,319 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 02:11:35,322 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 02:11:35,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:11:35" (1/1) ... [2021-12-28 02:11:35,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5346dc07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:35, skipping insertion in model container [2021-12-28 02:11:35,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:11:35" (1/1) ... [2021-12-28 02:11:35,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 02:11:35,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 02:11:35,475 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/combinations/gcd_4+newton_2_5.i[1224,1237] [2021-12-28 02:11:35,499 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/combinations/gcd_4+newton_2_5.i[2827,2840] [2021-12-28 02:11:35,506 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:11:35,514 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 02:11:35,531 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/combinations/gcd_4+newton_2_5.i[1224,1237] [2021-12-28 02:11:35,554 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/combinations/gcd_4+newton_2_5.i[2827,2840] [2021-12-28 02:11:35,560 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:11:35,572 INFO L208 MainTranslator]: Completed translation [2021-12-28 02:11:35,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:35 WrapperNode [2021-12-28 02:11:35,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 02:11:35,575 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 02:11:35,575 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 02:11:35,575 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 02:11:35,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:35" (1/1) ... [2021-12-28 02:11:35,595 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:35" (1/1) ... [2021-12-28 02:11:35,621 INFO L137 Inliner]: procedures = 27, calls = 18, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 72 [2021-12-28 02:11:35,621 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 02:11:35,622 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 02:11:35,622 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 02:11:35,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 02:11:35,629 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:35" (1/1) ... [2021-12-28 02:11:35,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:35" (1/1) ... [2021-12-28 02:11:35,633 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:35" (1/1) ... [2021-12-28 02:11:35,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:35" (1/1) ... [2021-12-28 02:11:35,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:35" (1/1) ... [2021-12-28 02:11:35,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:35" (1/1) ... [2021-12-28 02:11:35,658 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:35" (1/1) ... [2021-12-28 02:11:35,659 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 02:11:35,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 02:11:35,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 02:11:35,661 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 02:11:35,662 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:35" (1/1) ... [2021-12-28 02:11:35,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:11:35,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:11:35,692 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-28 02:11:35,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-28 02:11:35,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 02:11:35,729 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-12-28 02:11:35,729 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-12-28 02:11:35,729 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-12-28 02:11:35,729 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-12-28 02:11:35,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 02:11:35,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 02:11:35,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 02:11:35,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-28 02:11:35,730 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-28 02:11:35,806 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 02:11:35,807 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 02:11:35,993 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 02:11:35,998 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 02:11:35,999 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-28 02:11:36,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:11:36 BoogieIcfgContainer [2021-12-28 02:11:36,000 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 02:11:36,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 02:11:36,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 02:11:36,004 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 02:11:36,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 02:11:35" (1/3) ... [2021-12-28 02:11:36,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@392c183 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:11:36, skipping insertion in model container [2021-12-28 02:11:36,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:35" (2/3) ... [2021-12-28 02:11:36,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@392c183 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:11:36, skipping insertion in model container [2021-12-28 02:11:36,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:11:36" (3/3) ... [2021-12-28 02:11:36,007 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_2_5.i [2021-12-28 02:11:36,011 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 02:11:36,011 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-28 02:11:36,064 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 02:11:36,072 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 02:11:36,073 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-28 02:11:36,093 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 30 states have (on average 1.4) internal successors, (42), 32 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-28 02:11:36,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-28 02:11:36,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:11:36,097 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:11:36,098 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:11:36,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:11:36,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1780479560, now seen corresponding path program 1 times [2021-12-28 02:11:36,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:11:36,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339725382] [2021-12-28 02:11:36,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:11:36,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:11:36,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:11:36,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:11:36,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:11:36,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339725382] [2021-12-28 02:11:36,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339725382] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:11:36,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:11:36,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 02:11:36,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926045138] [2021-12-28 02:11:36,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:11:36,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:11:36,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:11:36,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:11:36,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:11:36,316 INFO L87 Difference]: Start difference. First operand has 43 states, 30 states have (on average 1.4) internal successors, (42), 32 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:36,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:11:36,361 INFO L93 Difference]: Finished difference Result 93 states and 127 transitions. [2021-12-28 02:11:36,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:11:36,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-28 02:11:36,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:11:36,369 INFO L225 Difference]: With dead ends: 93 [2021-12-28 02:11:36,370 INFO L226 Difference]: Without dead ends: 43 [2021-12-28 02:11:36,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:11:36,376 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 13 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:11:36,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 92 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:11:36,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-28 02:11:36,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2021-12-28 02:11:36,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-28 02:11:36,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-12-28 02:11:36,411 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 11 [2021-12-28 02:11:36,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:11:36,411 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-12-28 02:11:36,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:36,412 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-12-28 02:11:36,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-28 02:11:36,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:11:36,413 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:11:36,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 02:11:36,414 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:11:36,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:11:36,415 INFO L85 PathProgramCache]: Analyzing trace with hash 413626440, now seen corresponding path program 1 times [2021-12-28 02:11:36,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:11:36,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037717884] [2021-12-28 02:11:36,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:11:36,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:11:36,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:11:36,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:11:36,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:11:36,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037717884] [2021-12-28 02:11:36,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037717884] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:11:36,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:11:36,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 02:11:36,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611054602] [2021-12-28 02:11:36,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:11:36,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:11:36,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:11:36,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:11:36,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:11:36,449 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:36,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:11:36,465 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2021-12-28 02:11:36,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:11:36,466 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-28 02:11:36,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:11:36,467 INFO L225 Difference]: With dead ends: 52 [2021-12-28 02:11:36,467 INFO L226 Difference]: Without dead ends: 38 [2021-12-28 02:11:36,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:11:36,469 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:11:36,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 70 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:11:36,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-28 02:11:36,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-28 02:11:36,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-28 02:11:36,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-12-28 02:11:36,478 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 13 [2021-12-28 02:11:36,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:11:36,478 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-12-28 02:11:36,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:36,479 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-12-28 02:11:36,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-28 02:11:36,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:11:36,480 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:11:36,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 02:11:36,480 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:11:36,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:11:36,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1715037691, now seen corresponding path program 1 times [2021-12-28 02:11:36,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:11:36,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981877620] [2021-12-28 02:11:36,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:11:36,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:11:36,496 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 02:11:36,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1557560601] [2021-12-28 02:11:36,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:11:36,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:11:36,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:11:36,499 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) [2021-12-28 02:11:36,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 02:11:36,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:11:36,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 02:11:36,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:11:36,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:11:36,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:11:36,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:11:36,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:11:36,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981877620] [2021-12-28 02:11:36,815 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 02:11:36,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557560601] [2021-12-28 02:11:36,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557560601] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:11:36,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 02:11:36,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-28 02:11:36,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246725051] [2021-12-28 02:11:36,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 02:11:36,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:11:36,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:11:36,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:11:36,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:11:36,821 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:36,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:11:36,853 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2021-12-28 02:11:36,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 02:11:36,854 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-28 02:11:36,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:11:36,855 INFO L225 Difference]: With dead ends: 55 [2021-12-28 02:11:36,855 INFO L226 Difference]: Without dead ends: 42 [2021-12-28 02:11:36,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:11:36,856 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:11:36,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 134 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:11:36,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-28 02:11:36,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-12-28 02:11:36,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-28 02:11:36,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-12-28 02:11:36,867 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 15 [2021-12-28 02:11:36,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:11:36,868 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-12-28 02:11:36,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:36,868 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-12-28 02:11:36,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-28 02:11:36,870 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:11:36,871 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:11:36,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 02:11:37,087 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 [2021-12-28 02:11:37,088 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:11:37,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:11:37,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1992731711, now seen corresponding path program 1 times [2021-12-28 02:11:37,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:11:37,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537599552] [2021-12-28 02:11:37,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:11:37,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:11:37,104 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 02:11:37,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2073122547] [2021-12-28 02:11:37,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:11:37,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:11:37,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:11:37,106 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) [2021-12-28 02:11:37,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 02:11:37,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:11:37,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-28 02:11:37,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:11:37,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:11:37,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:11:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:11:37,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:11:37,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537599552] [2021-12-28 02:11:37,465 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 02:11:37,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073122547] [2021-12-28 02:11:37,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073122547] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:11:37,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 02:11:37,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-28 02:11:37,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717821853] [2021-12-28 02:11:37,479 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 02:11:37,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 02:11:37,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:11:37,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 02:11:37,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-28 02:11:37,483 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:37,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:11:37,559 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-12-28 02:11:37,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:11:37,560 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-28 02:11:37,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:11:37,561 INFO L225 Difference]: With dead ends: 57 [2021-12-28 02:11:37,561 INFO L226 Difference]: Without dead ends: 44 [2021-12-28 02:11:37,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-28 02:11:37,562 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 9 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:11:37,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 198 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:11:37,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-28 02:11:37,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-12-28 02:11:37,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-28 02:11:37,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-12-28 02:11:37,569 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 19 [2021-12-28 02:11:37,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:11:37,570 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-12-28 02:11:37,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:37,570 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-12-28 02:11:37,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-28 02:11:37,571 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:11:37,571 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:11:37,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 02:11:37,775 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 [2021-12-28 02:11:37,776 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:11:37,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:11:37,776 INFO L85 PathProgramCache]: Analyzing trace with hash -626365316, now seen corresponding path program 2 times [2021-12-28 02:11:37,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:11:37,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155948302] [2021-12-28 02:11:37,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:11:37,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:11:37,788 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 02:11:37,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [992292399] [2021-12-28 02:11:37,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 02:11:37,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:11:37,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:11:37,795 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) [2021-12-28 02:11:37,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 02:11:37,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 02:11:37,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 02:11:37,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-28 02:11:37,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:11:37,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:11:37,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:11:38,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:11:38,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:11:38,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155948302] [2021-12-28 02:11:38,054 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 02:11:38,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992292399] [2021-12-28 02:11:38,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992292399] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:11:38,055 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 02:11:38,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-28 02:11:38,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47814099] [2021-12-28 02:11:38,055 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 02:11:38,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-28 02:11:38,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:11:38,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-28 02:11:38,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-12-28 02:11:38,057 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:38,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:11:38,130 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2021-12-28 02:11:38,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 02:11:38,131 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-28 02:11:38,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:11:38,133 INFO L225 Difference]: With dead ends: 65 [2021-12-28 02:11:38,133 INFO L226 Difference]: Without dead ends: 50 [2021-12-28 02:11:38,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-12-28 02:11:38,134 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:11:38,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 261 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:11:38,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-28 02:11:38,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-12-28 02:11:38,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-28 02:11:38,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-12-28 02:11:38,142 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 21 [2021-12-28 02:11:38,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:11:38,142 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-12-28 02:11:38,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:38,143 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-12-28 02:11:38,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-28 02:11:38,143 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:11:38,144 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:11:38,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 02:11:38,363 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 [2021-12-28 02:11:38,364 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:11:38,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:11:38,364 INFO L85 PathProgramCache]: Analyzing trace with hash 2101905688, now seen corresponding path program 1 times [2021-12-28 02:11:38,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:11:38,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572647136] [2021-12-28 02:11:38,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:11:38,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:11:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-28 02:11:38,379 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-28 02:11:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-28 02:11:38,400 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-28 02:11:38,400 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-28 02:11:38,401 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-12-28 02:11:38,407 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-28 02:11:38,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 02:11:38,410 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2021-12-28 02:11:38,412 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-28 02:11:38,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.12 02:11:38 BoogieIcfgContainer [2021-12-28 02:11:38,438 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-28 02:11:38,439 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-28 02:11:38,439 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-28 02:11:38,439 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-28 02:11:38,440 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:11:36" (3/4) ... [2021-12-28 02:11:38,442 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-28 02:11:38,442 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-28 02:11:38,443 INFO L158 Benchmark]: Toolchain (without parser) took 3125.58ms. Allocated memory was 62.9MB in the beginning and 77.6MB in the end (delta: 14.7MB). Free memory was 44.2MB in the beginning and 45.1MB in the end (delta: -927.9kB). Peak memory consumption was 14.4MB. Max. memory is 16.1GB. [2021-12-28 02:11:38,443 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 62.9MB. Free memory was 45.4MB in the beginning and 45.4MB in the end (delta: 49.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-28 02:11:38,444 INFO L158 Benchmark]: CACSL2BoogieTranslator took 255.21ms. Allocated memory is still 62.9MB. Free memory was 44.0MB in the beginning and 32.5MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-28 02:11:38,444 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.53ms. Allocated memory is still 62.9MB. Free memory was 32.5MB in the beginning and 30.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-28 02:11:38,444 INFO L158 Benchmark]: Boogie Preprocessor took 38.00ms. Allocated memory is still 62.9MB. Free memory was 30.8MB in the beginning and 29.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-28 02:11:38,445 INFO L158 Benchmark]: RCFGBuilder took 339.38ms. Allocated memory is still 62.9MB. Free memory was 29.5MB in the beginning and 39.6MB in the end (delta: -10.1MB). Peak memory consumption was 8.3MB. Max. memory is 16.1GB. [2021-12-28 02:11:38,445 INFO L158 Benchmark]: TraceAbstraction took 2436.55ms. Allocated memory was 62.9MB in the beginning and 77.6MB in the end (delta: 14.7MB). Free memory was 39.1MB in the beginning and 45.1MB in the end (delta: -6.0MB). Peak memory consumption was 8.2MB. Max. memory is 16.1GB. [2021-12-28 02:11:38,445 INFO L158 Benchmark]: Witness Printer took 3.52ms. Allocated memory is still 77.6MB. Free memory is still 45.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-28 02:11:38,448 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 62.9MB. Free memory was 45.4MB in the beginning and 45.4MB in the end (delta: 49.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 255.21ms. Allocated memory is still 62.9MB. Free memory was 44.0MB in the beginning and 32.5MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.53ms. Allocated memory is still 62.9MB. Free memory was 32.5MB in the beginning and 30.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.00ms. Allocated memory is still 62.9MB. Free memory was 30.8MB in the beginning and 29.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 339.38ms. Allocated memory is still 62.9MB. Free memory was 29.5MB in the beginning and 39.6MB in the end (delta: -10.1MB). Peak memory consumption was 8.3MB. Max. memory is 16.1GB. * TraceAbstraction took 2436.55ms. Allocated memory was 62.9MB in the beginning and 77.6MB in the end (delta: 14.7MB). Free memory was 39.1MB in the beginning and 45.1MB in the end (delta: -6.0MB). Peak memory consumption was 8.2MB. Max. memory is 16.1GB. * Witness Printer took 3.52ms. Allocated memory is still 77.6MB. Free memory is still 45.1MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 109]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 98, overapproximation of someBinaryDOUBLEComparisonOperation at line 108, overapproximation of someBinaryArithmeticFLOAToperation at line 102. Possible FailurePath: [L115] COND FALSE !(__VERIFIER_nondet_int()) [L118] CALL main2() [L97] float IN = __VERIFIER_nondet_float(); [L98] CALL assume_abort_if_not(IN > -1.0f && IN < 1.0f) [L82] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L98] RET assume_abort_if_not(IN > -1.0f && IN < 1.0f) [L100] CALL, EXPR f(IN) VAL [\old(x)=53] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=53, x=53] [L100] RET, EXPR f(IN) VAL [f(IN)=50, IN=53] [L100] CALL, EXPR fp(IN) VAL [\old(x)=53] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=53, x=53] [L100] RET, EXPR fp(IN) VAL [f(IN)=50, fp(IN)=49, IN=53] [L100] float x = IN - f(IN)/fp(IN); [L102] CALL, EXPR f(x) VAL [\old(x)=51] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=51, x=51] [L102] RET, EXPR f(x) VAL [f(x)=54, IN=53, x=51] [L102] CALL, EXPR fp(x) VAL [\old(x)=51] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=51, x=51] [L102] RET, EXPR fp(x) VAL [f(x)=54, fp(x)=52, IN=53, x=51] [L102] x = x - f(x)/fp(x) [L108] COND TRUE !(x < 0.1) VAL [IN=53] [L109] reach_error() VAL [IN=53] - UnprovableResult [Line: 27]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 43 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 2.3s, OverallIterations: 6, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 36 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 33 mSDsluCounter, 755 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 561 mSDsCounter, 18 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 154 IncrementalHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 18 mSolverCounterUnsat, 194 mSDtfsCounter, 154 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 114 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=5, InterpolantAutomatonStates: 24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 7 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 104 NumberOfCodeBlocks, 104 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 126 ConstructedInterpolants, 0 QuantifiedInterpolants, 435 SizeOfPredicates, 17 NumberOfNonLiveVariables, 212 ConjunctsInSsa, 29 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 12/52 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-28 02:11:38,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/gcd_4+newton_2_5.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8402c5691f7146360213fdb1e8b03143db0d7add581e1f213f9dfbebb48edc07 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 02:11:40,373 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 02:11:40,375 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 02:11:40,410 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 02:11:40,411 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 02:11:40,414 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 02:11:40,416 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 02:11:40,421 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 02:11:40,424 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 02:11:40,429 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 02:11:40,431 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 02:11:40,435 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 02:11:40,435 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 02:11:40,438 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 02:11:40,439 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 02:11:40,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 02:11:40,442 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 02:11:40,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 02:11:40,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 02:11:40,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 02:11:40,452 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 02:11:40,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 02:11:40,454 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 02:11:40,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 02:11:40,462 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 02:11:40,463 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 02:11:40,463 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 02:11:40,465 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 02:11:40,465 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 02:11:40,466 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 02:11:40,466 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 02:11:40,467 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 02:11:40,469 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 02:11:40,469 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 02:11:40,470 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 02:11:40,471 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 02:11:40,471 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 02:11:40,472 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 02:11:40,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 02:11:40,474 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 02:11:40,474 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 02:11:40,478 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-28 02:11:40,523 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 02:11:40,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 02:11:40,525 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 02:11:40,525 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 02:11:40,526 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 02:11:40,526 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 02:11:40,527 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 02:11:40,528 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 02:11:40,528 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 02:11:40,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 02:11:40,529 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 02:11:40,529 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 02:11:40,529 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 02:11:40,530 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 02:11:40,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 02:11:40,530 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 02:11:40,530 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-28 02:11:40,530 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-28 02:11:40,531 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-28 02:11:40,531 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 02:11:40,531 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 02:11:40,531 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 02:11:40,531 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 02:11:40,532 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 02:11:40,532 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 02:11:40,532 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 02:11:40,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:11:40,532 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 02:11:40,533 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 02:11:40,533 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 02:11:40,533 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-28 02:11:40,533 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-28 02:11:40,534 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 02:11:40,534 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 02:11:40,534 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 02:11:40,534 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-28 02:11:40,534 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8402c5691f7146360213fdb1e8b03143db0d7add581e1f213f9dfbebb48edc07 [2021-12-28 02:11:40,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 02:11:40,868 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 02:11:40,872 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 02:11:40,873 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 02:11:40,874 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 02:11:40,876 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_4+newton_2_5.i [2021-12-28 02:11:40,930 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/470abf887/4a6d0a421851406390b07f5a47bfecbf/FLAG3a1ff78ad [2021-12-28 02:11:41,357 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 02:11:41,358 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_2_5.i [2021-12-28 02:11:41,366 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/470abf887/4a6d0a421851406390b07f5a47bfecbf/FLAG3a1ff78ad [2021-12-28 02:11:41,756 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/470abf887/4a6d0a421851406390b07f5a47bfecbf [2021-12-28 02:11:41,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 02:11:41,761 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 02:11:41,762 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 02:11:41,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 02:11:41,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 02:11:41,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:11:41" (1/1) ... [2021-12-28 02:11:41,767 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21ad216e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:41, skipping insertion in model container [2021-12-28 02:11:41,767 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:11:41" (1/1) ... [2021-12-28 02:11:41,773 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 02:11:41,788 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 02:11:41,899 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/combinations/gcd_4+newton_2_5.i[1224,1237] [2021-12-28 02:11:41,922 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/combinations/gcd_4+newton_2_5.i[2827,2840] [2021-12-28 02:11:41,923 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:11:41,933 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 02:11:41,949 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/combinations/gcd_4+newton_2_5.i[1224,1237] [2021-12-28 02:11:41,959 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/combinations/gcd_4+newton_2_5.i[2827,2840] [2021-12-28 02:11:41,964 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:11:42,001 INFO L208 MainTranslator]: Completed translation [2021-12-28 02:11:42,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:42 WrapperNode [2021-12-28 02:11:42,002 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 02:11:42,006 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 02:11:42,007 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 02:11:42,007 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 02:11:42,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:42" (1/1) ... [2021-12-28 02:11:42,019 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:42" (1/1) ... [2021-12-28 02:11:42,036 INFO L137 Inliner]: procedures = 28, calls = 18, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 69 [2021-12-28 02:11:42,037 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 02:11:42,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 02:11:42,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 02:11:42,038 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 02:11:42,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:42" (1/1) ... [2021-12-28 02:11:42,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:42" (1/1) ... [2021-12-28 02:11:42,048 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:42" (1/1) ... [2021-12-28 02:11:42,048 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:42" (1/1) ... [2021-12-28 02:11:42,055 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:42" (1/1) ... [2021-12-28 02:11:42,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:42" (1/1) ... [2021-12-28 02:11:42,061 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:42" (1/1) ... [2021-12-28 02:11:42,063 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 02:11:42,064 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 02:11:42,064 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 02:11:42,064 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 02:11:42,065 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:42" (1/1) ... [2021-12-28 02:11:42,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:11:42,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:11:42,097 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-28 02:11:42,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 02:11:42,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-28 02:11:42,133 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-12-28 02:11:42,133 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-12-28 02:11:42,134 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-12-28 02:11:42,134 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-12-28 02:11:42,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 02:11:42,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 02:11:42,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-28 02:11:42,139 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-28 02:11:42,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-28 02:11:42,210 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 02:11:42,211 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 02:11:49,569 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 02:11:49,574 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 02:11:49,574 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-28 02:11:49,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:11:49 BoogieIcfgContainer [2021-12-28 02:11:49,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 02:11:49,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 02:11:49,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 02:11:49,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 02:11:49,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 02:11:41" (1/3) ... [2021-12-28 02:11:49,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ec0d8eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:11:49, skipping insertion in model container [2021-12-28 02:11:49,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:11:42" (2/3) ... [2021-12-28 02:11:49,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ec0d8eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:11:49, skipping insertion in model container [2021-12-28 02:11:49,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:11:49" (3/3) ... [2021-12-28 02:11:49,583 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_2_5.i [2021-12-28 02:11:49,588 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 02:11:49,588 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-28 02:11:49,632 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 02:11:49,638 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 02:11:49,638 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-28 02:11:49,651 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 30 states have (on average 1.4) internal successors, (42), 32 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-28 02:11:49,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-28 02:11:49,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:11:49,656 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:11:49,657 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:11:49,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:11:49,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1780479560, now seen corresponding path program 1 times [2021-12-28 02:11:49,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 02:11:49,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [498711306] [2021-12-28 02:11:49,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:11:49,672 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 02:11:49,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 02:11:49,675 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 02:11:49,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-28 02:11:49,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:11:49,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-28 02:11:49,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:11:49,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:11:49,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:11:49,946 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 02:11:49,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [498711306] [2021-12-28 02:11:49,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [498711306] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:11:49,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:11:49,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 02:11:49,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792196778] [2021-12-28 02:11:49,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:11:49,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:11:49,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 02:11:49,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:11:49,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:11:49,976 INFO L87 Difference]: Start difference. First operand has 43 states, 30 states have (on average 1.4) internal successors, (42), 32 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:50,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:11:50,076 INFO L93 Difference]: Finished difference Result 93 states and 127 transitions. [2021-12-28 02:11:50,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:11:50,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-28 02:11:50,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:11:50,084 INFO L225 Difference]: With dead ends: 93 [2021-12-28 02:11:50,084 INFO L226 Difference]: Without dead ends: 43 [2021-12-28 02:11:50,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:11:50,090 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 13 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:11:50,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 92 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 02:11:50,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-28 02:11:50,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2021-12-28 02:11:50,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-28 02:11:50,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-12-28 02:11:50,125 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 11 [2021-12-28 02:11:50,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:11:50,126 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-12-28 02:11:50,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:50,126 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-12-28 02:11:50,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-28 02:11:50,127 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:11:50,127 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:11:50,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-28 02:11:50,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 02:11:50,339 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:11:50,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:11:50,340 INFO L85 PathProgramCache]: Analyzing trace with hash 413626440, now seen corresponding path program 1 times [2021-12-28 02:11:50,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 02:11:50,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389947483] [2021-12-28 02:11:50,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:11:50,341 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 02:11:50,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 02:11:50,342 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 02:11:50,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-28 02:11:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:11:50,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-28 02:11:50,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:11:50,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:11:50,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:11:50,590 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 02:11:50,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389947483] [2021-12-28 02:11:50,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [389947483] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:11:50,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:11:50,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 02:11:50,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159180462] [2021-12-28 02:11:50,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:11:50,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:11:50,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 02:11:50,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:11:50,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:11:50,593 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:50,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:11:50,689 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2021-12-28 02:11:50,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:11:50,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-28 02:11:50,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:11:50,691 INFO L225 Difference]: With dead ends: 52 [2021-12-28 02:11:50,691 INFO L226 Difference]: Without dead ends: 38 [2021-12-28 02:11:50,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:11:50,693 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:11:50,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 70 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 02:11:50,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-28 02:11:50,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-28 02:11:50,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-28 02:11:50,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-12-28 02:11:50,700 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 13 [2021-12-28 02:11:50,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:11:50,701 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-12-28 02:11:50,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:50,701 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-12-28 02:11:50,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-28 02:11:50,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:11:50,702 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:11:50,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-28 02:11:50,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 02:11:50,912 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:11:50,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:11:50,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1715037691, now seen corresponding path program 1 times [2021-12-28 02:11:50,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 02:11:50,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [848194720] [2021-12-28 02:11:50,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:11:50,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 02:11:50,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 02:11:50,914 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 02:11:50,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-28 02:11:50,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:11:50,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-28 02:11:50,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:11:51,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:11:51,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:11:51,311 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 02:11:51,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [848194720] [2021-12-28 02:11:51,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [848194720] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:11:51,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:11:51,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 02:11:51,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351768730] [2021-12-28 02:11:51,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:11:51,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:11:51,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 02:11:51,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:11:51,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:11:51,313 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:51,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:11:51,416 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2021-12-28 02:11:51,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:11:51,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-28 02:11:51,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:11:51,417 INFO L225 Difference]: With dead ends: 53 [2021-12-28 02:11:51,417 INFO L226 Difference]: Without dead ends: 40 [2021-12-28 02:11:51,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:11:51,419 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:11:51,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 02:11:51,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-28 02:11:51,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-12-28 02:11:51,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-28 02:11:51,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-12-28 02:11:51,425 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 15 [2021-12-28 02:11:51,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:11:51,425 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-12-28 02:11:51,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:51,426 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-12-28 02:11:51,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-28 02:11:51,426 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:11:51,426 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:11:51,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-28 02:11:51,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 02:11:51,639 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:11:51,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:11:51,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1030095042, now seen corresponding path program 1 times [2021-12-28 02:11:51,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 02:11:51,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1661491291] [2021-12-28 02:11:51,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:11:51,641 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 02:11:51,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 02:11:51,641 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 02:11:51,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-28 02:11:51,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:11:51,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 02:11:51,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:11:52,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:11:52,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:11:52,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:11:52,516 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 02:11:52,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1661491291] [2021-12-28 02:11:52,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1661491291] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:11:52,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 02:11:52,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-28 02:11:52,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087477165] [2021-12-28 02:11:52,517 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 02:11:52,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:11:52,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 02:11:52,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:11:52,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:11:52,518 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:52,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:11:52,774 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2021-12-28 02:11:52,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:11:52,775 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-28 02:11:52,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:11:52,775 INFO L225 Difference]: With dead ends: 57 [2021-12-28 02:11:52,776 INFO L226 Difference]: Without dead ends: 44 [2021-12-28 02:11:52,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:11:52,777 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:11:52,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 132 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 02:11:52,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-28 02:11:52,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-12-28 02:11:52,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-28 02:11:52,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-12-28 02:11:52,787 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 17 [2021-12-28 02:11:52,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:11:52,788 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-12-28 02:11:52,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:11:52,788 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-12-28 02:11:52,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-28 02:11:52,789 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:11:52,789 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:11:52,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-28 02:11:53,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 02:11:53,001 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:11:53,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:11:53,002 INFO L85 PathProgramCache]: Analyzing trace with hash -626365316, now seen corresponding path program 2 times [2021-12-28 02:11:53,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 02:11:53,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045802620] [2021-12-28 02:11:53,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 02:11:53,003 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 02:11:53,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 02:11:53,005 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 02:11:53,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-28 02:11:53,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 02:11:53,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 02:11:53,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-28 02:11:53,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:11:54,682 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 02:11:54,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:12:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 02:12:03,146 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 02:12:03,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045802620] [2021-12-28 02:12:03,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045802620] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:12:03,147 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 02:12:03,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-28 02:12:03,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908907842] [2021-12-28 02:12:03,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 02:12:03,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-28 02:12:03,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 02:12:03,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-28 02:12:03,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-12-28 02:12:03,150 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:12:20,806 WARN L228 SmtUtils]: Spent 7.45s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-28 02:12:38,037 WARN L228 SmtUtils]: Spent 8.94s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)