./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound100.c --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/nla-digbench-scaling/cohendiv-ll_unwindbound100.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7cdbf1a1c8f20bea42ab4ad35fbada62352deeb8460cfeb3778e870071fb234e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 00:11:48,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 00:11:48,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 00:11:48,357 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 00:11:48,357 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 00:11:48,360 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 00:11:48,361 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 00:11:48,366 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 00:11:48,368 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 00:11:48,372 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 00:11:48,373 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 00:11:48,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 00:11:48,375 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 00:11:48,377 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 00:11:48,378 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 00:11:48,380 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 00:11:48,381 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 00:11:48,382 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 00:11:48,386 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 00:11:48,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 00:11:48,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 00:11:48,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 00:11:48,395 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 00:11:48,396 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 00:11:48,402 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 00:11:48,402 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 00:11:48,402 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 00:11:48,404 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 00:11:48,404 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 00:11:48,405 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 00:11:48,405 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 00:11:48,406 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 00:11:48,407 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 00:11:48,408 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 00:11:48,409 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 00:11:48,409 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 00:11:48,410 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 00:11:48,410 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 00:11:48,410 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 00:11:48,416 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 00:11:48,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 00:11:48,420 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 00:11:48,455 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 00:11:48,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 00:11:48,457 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 00:11:48,457 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 00:11:48,458 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 00:11:48,458 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 00:11:48,459 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 00:11:48,459 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 00:11:48,460 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 00:11:48,460 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 00:11:48,461 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 00:11:48,461 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 00:11:48,461 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 00:11:48,461 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 00:11:48,461 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 00:11:48,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 00:11:48,462 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 00:11:48,462 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 00:11:48,462 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 00:11:48,462 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 00:11:48,463 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 00:11:48,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 00:11:48,463 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 00:11:48,463 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 00:11:48,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 00:11:48,464 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 00:11:48,464 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 00:11:48,464 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 00:11:48,464 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 00:11:48,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 00:11:48,465 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 00:11:48,465 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 00:11:48,465 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 00:11:48,466 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7cdbf1a1c8f20bea42ab4ad35fbada62352deeb8460cfeb3778e870071fb234e [2021-12-28 00:11:48,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 00:11:48,804 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 00:11:48,807 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 00:11:48,808 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 00:11:48,808 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 00:11:48,810 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound100.c [2021-12-28 00:11:48,873 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72b9cf3ec/239d175f640d4c8184af8caf9f216427/FLAG9174dd47a [2021-12-28 00:11:49,263 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 00:11:49,263 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound100.c [2021-12-28 00:11:49,269 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72b9cf3ec/239d175f640d4c8184af8caf9f216427/FLAG9174dd47a [2021-12-28 00:11:49,675 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72b9cf3ec/239d175f640d4c8184af8caf9f216427 [2021-12-28 00:11:49,678 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 00:11:49,679 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 00:11:49,681 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 00:11:49,682 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 00:11:49,689 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 00:11:49,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 12:11:49" (1/1) ... [2021-12-28 00:11:49,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cc52574 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:11:49, skipping insertion in model container [2021-12-28 00:11:49,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 12:11:49" (1/1) ... [2021-12-28 00:11:49,697 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 00:11:49,711 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 00:11:49,864 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/nla-digbench-scaling/cohendiv-ll_unwindbound100.c[576,589] [2021-12-28 00:11:49,885 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 00:11:49,898 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 00:11:49,910 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/nla-digbench-scaling/cohendiv-ll_unwindbound100.c[576,589] [2021-12-28 00:11:49,917 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 00:11:49,930 INFO L208 MainTranslator]: Completed translation [2021-12-28 00:11:49,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:11:49 WrapperNode [2021-12-28 00:11:49,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 00:11:49,932 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 00:11:49,932 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 00:11:49,932 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 00:11:49,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:11:49" (1/1) ... [2021-12-28 00:11:49,943 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:11:49" (1/1) ... [2021-12-28 00:11:50,007 INFO L137 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2021-12-28 00:11:50,007 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 00:11:50,008 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 00:11:50,008 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 00:11:50,009 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 00:11:50,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:11:49" (1/1) ... [2021-12-28 00:11:50,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:11:49" (1/1) ... [2021-12-28 00:11:50,024 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:11:49" (1/1) ... [2021-12-28 00:11:50,025 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:11:49" (1/1) ... [2021-12-28 00:11:50,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:11:49" (1/1) ... [2021-12-28 00:11:50,038 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:11:49" (1/1) ... [2021-12-28 00:11:50,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:11:49" (1/1) ... [2021-12-28 00:11:50,044 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 00:11:50,045 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 00:11:50,045 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 00:11:50,046 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 00:11:50,047 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:11:49" (1/1) ... [2021-12-28 00:11:50,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 00:11:50,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:11:50,077 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 00:11:50,103 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 00:11:50,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 00:11:50,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 00:11:50,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 00:11:50,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 00:11:50,120 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-28 00:11:50,120 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-28 00:11:50,180 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 00:11:50,181 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 00:11:50,344 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 00:11:50,349 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 00:11:50,349 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-28 00:11:50,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 12:11:50 BoogieIcfgContainer [2021-12-28 00:11:50,352 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 00:11:50,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 00:11:50,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 00:11:50,355 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 00:11:50,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 12:11:49" (1/3) ... [2021-12-28 00:11:50,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c4de471 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 12:11:50, skipping insertion in model container [2021-12-28 00:11:50,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:11:49" (2/3) ... [2021-12-28 00:11:50,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c4de471 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 12:11:50, skipping insertion in model container [2021-12-28 00:11:50,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 12:11:50" (3/3) ... [2021-12-28 00:11:50,358 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound100.c [2021-12-28 00:11:50,362 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 00:11:50,362 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 00:11:50,431 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 00:11:50,437 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 00:11:50,438 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 00:11:50,462 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-28 00:11:50,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-28 00:11:50,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:11:50,467 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:11:50,469 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:11:50,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:11:50,477 INFO L85 PathProgramCache]: Analyzing trace with hash -555122024, now seen corresponding path program 1 times [2021-12-28 00:11:50,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:11:50,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104899055] [2021-12-28 00:11:50,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:11:50,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:11:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:11:50,618 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 00:11:50,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:11:50,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104899055] [2021-12-28 00:11:50,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104899055] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:11:50,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:11:50,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 00:11:50,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828587352] [2021-12-28 00:11:50,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:11:50,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-28 00:11:50,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:11:50,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-28 00:11:50,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 00:11:50,657 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 00:11:50,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:11:50,679 INFO L93 Difference]: Finished difference Result 55 states and 87 transitions. [2021-12-28 00:11:50,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-28 00:11:50,682 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 9 [2021-12-28 00:11:50,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:11:50,687 INFO L225 Difference]: With dead ends: 55 [2021-12-28 00:11:50,688 INFO L226 Difference]: Without dead ends: 25 [2021-12-28 00:11:50,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 00:11:50,695 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:11:50,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:11:50,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-28 00:11:50,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-12-28 00:11:50,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-28 00:11:50,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-12-28 00:11:50,736 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 9 [2021-12-28 00:11:50,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:11:50,737 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-12-28 00:11:50,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 00:11:50,737 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-12-28 00:11:50,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-28 00:11:50,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:11:50,739 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:11:50,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 00:11:50,740 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:11:50,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:11:50,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1985514477, now seen corresponding path program 1 times [2021-12-28 00:11:50,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:11:50,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682987129] [2021-12-28 00:11:50,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:11:50,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:11:50,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:11:50,853 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 00:11:50,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:11:50,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682987129] [2021-12-28 00:11:50,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682987129] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:11:50,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:11:50,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 00:11:50,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971327011] [2021-12-28 00:11:50,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:11:50,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 00:11:50,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:11:50,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 00:11:50,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 00:11:50,859 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 00:11:50,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:11:50,886 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2021-12-28 00:11:50,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 00:11:50,887 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 10 [2021-12-28 00:11:50,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:11:50,889 INFO L225 Difference]: With dead ends: 34 [2021-12-28 00:11:50,889 INFO L226 Difference]: Without dead ends: 27 [2021-12-28 00:11:50,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 00:11:50,895 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:11:50,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:11:50,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-28 00:11:50,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-28 00:11:50,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-28 00:11:50,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2021-12-28 00:11:50,910 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 10 [2021-12-28 00:11:50,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:11:50,911 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2021-12-28 00:11:50,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 00:11:50,912 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2021-12-28 00:11:50,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-28 00:11:50,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:11:50,914 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:11:50,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 00:11:50,915 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:11:50,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:11:50,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1984024927, now seen corresponding path program 1 times [2021-12-28 00:11:50,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:11:50,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280137150] [2021-12-28 00:11:50,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:11:50,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:11:50,928 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:11:50,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [474150093] [2021-12-28 00:11:50,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:11:50,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:11:50,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:11:50,936 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 00:11:50,959 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 00:11:50,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:11:50,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-28 00:11:50,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:11:51,055 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 00:11:51,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 00:11:51,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:11:51,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280137150] [2021-12-28 00:11:51,056 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:11:51,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474150093] [2021-12-28 00:11:51,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474150093] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:11:51,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:11:51,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 00:11:51,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863820819] [2021-12-28 00:11:51,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:11:51,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 00:11:51,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:11:51,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 00:11:51,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 00:11:51,059 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 00:11:51,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:11:51,094 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2021-12-28 00:11:51,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 00:11:51,095 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 10 [2021-12-28 00:11:51,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:11:51,096 INFO L225 Difference]: With dead ends: 37 [2021-12-28 00:11:51,096 INFO L226 Difference]: Without dead ends: 35 [2021-12-28 00:11:51,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 00:11:51,097 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:11:51,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 117 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:11:51,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-28 00:11:51,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-12-28 00:11:51,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-28 00:11:51,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-12-28 00:11:51,105 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 10 [2021-12-28 00:11:51,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:11:51,105 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-12-28 00:11:51,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 00:11:51,106 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-12-28 00:11:51,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-28 00:11:51,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:11:51,107 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:11:51,141 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 00:11:51,327 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 00:11:51,328 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:11:51,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:11:51,328 INFO L85 PathProgramCache]: Analyzing trace with hash -2084809189, now seen corresponding path program 1 times [2021-12-28 00:11:51,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:11:51,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151282837] [2021-12-28 00:11:51,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:11:51,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:11:51,338 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:11:51,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037717884] [2021-12-28 00:11:51,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:11:51,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:11:51,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:11:51,343 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 00:11:51,344 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 00:11:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:11:51,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-28 00:11:51,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:11:51,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 00:11:51,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 00:11:51,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:11:51,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151282837] [2021-12-28 00:11:51,475 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:11:51,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037717884] [2021-12-28 00:11:51,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037717884] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:11:51,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:11:51,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 00:11:51,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725840671] [2021-12-28 00:11:51,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:11:51,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 00:11:51,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:11:51,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 00:11:51,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 00:11:51,478 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 00:11:51,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:11:51,576 INFO L93 Difference]: Finished difference Result 50 states and 66 transitions. [2021-12-28 00:11:51,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 00:11:51,576 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-28 00:11:51,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:11:51,577 INFO L225 Difference]: With dead ends: 50 [2021-12-28 00:11:51,577 INFO L226 Difference]: Without dead ends: 47 [2021-12-28 00:11:51,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 00:11:51,578 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 13 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 00:11:51,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 117 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 00:11:51,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-28 00:11:51,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-12-28 00:11:51,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-28 00:11:51,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 61 transitions. [2021-12-28 00:11:51,586 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 61 transitions. Word has length 15 [2021-12-28 00:11:51,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:11:51,586 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 61 transitions. [2021-12-28 00:11:51,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 00:11:51,587 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 61 transitions. [2021-12-28 00:11:51,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-28 00:11:51,587 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:11:51,587 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:11:51,611 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 00:11:51,788 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 00:11:51,788 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:11:51,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:11:51,789 INFO L85 PathProgramCache]: Analyzing trace with hash -2002825724, now seen corresponding path program 1 times [2021-12-28 00:11:51,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:11:51,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292640751] [2021-12-28 00:11:51,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:11:51,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:11:51,799 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:11:51,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037450550] [2021-12-28 00:11:51,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:11:51,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:11:51,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:11:51,801 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 00:11:51,807 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 00:11:51,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:11:51,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-28 00:11:51,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:11:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 00:11:51,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 00:11:51,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:11:51,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292640751] [2021-12-28 00:11:51,907 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:11:51,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037450550] [2021-12-28 00:11:51,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037450550] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:11:51,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:11:51,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 00:11:51,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963765832] [2021-12-28 00:11:51,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:11:51,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 00:11:51,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:11:51,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 00:11:51,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 00:11:51,909 INFO L87 Difference]: Start difference. First operand 46 states and 61 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 00:11:51,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:11:51,970 INFO L93 Difference]: Finished difference Result 75 states and 105 transitions. [2021-12-28 00:11:51,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 00:11:51,970 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2021-12-28 00:11:51,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:11:51,977 INFO L225 Difference]: With dead ends: 75 [2021-12-28 00:11:51,980 INFO L226 Difference]: Without dead ends: 73 [2021-12-28 00:11:51,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 00:11:51,982 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 13 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:11:51,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 128 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:11:51,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-28 00:11:52,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 66. [2021-12-28 00:11:52,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 43 states have internal predecessors, (53), 20 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-28 00:11:52,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 92 transitions. [2021-12-28 00:11:52,012 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 92 transitions. Word has length 23 [2021-12-28 00:11:52,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:11:52,012 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 92 transitions. [2021-12-28 00:11:52,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 00:11:52,013 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 92 transitions. [2021-12-28 00:11:52,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-28 00:11:52,014 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:11:52,014 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:11:52,045 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 00:11:52,235 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 00:11:52,236 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:11:52,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:11:52,236 INFO L85 PathProgramCache]: Analyzing trace with hash -840648207, now seen corresponding path program 1 times [2021-12-28 00:11:52,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:11:52,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302448745] [2021-12-28 00:11:52,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:11:52,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:11:52,246 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:11:52,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [246725051] [2021-12-28 00:11:52,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:11:52,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:11:52,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:11:52,252 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:11:52,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 00:11:52,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:11:52,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-28 00:11:52,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:11:52,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 00:11:52,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 00:11:52,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:11:52,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302448745] [2021-12-28 00:11:52,365 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:11:52,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246725051] [2021-12-28 00:11:52,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246725051] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:11:52,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:11:52,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 00:11:52,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653336085] [2021-12-28 00:11:52,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:11:52,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 00:11:52,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:11:52,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 00:11:52,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 00:11:52,369 INFO L87 Difference]: Start difference. First operand 66 states and 92 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 00:11:52,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:11:52,409 INFO L93 Difference]: Finished difference Result 105 states and 145 transitions. [2021-12-28 00:11:52,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 00:11:52,413 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-12-28 00:11:52,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:11:52,416 INFO L225 Difference]: With dead ends: 105 [2021-12-28 00:11:52,417 INFO L226 Difference]: Without dead ends: 70 [2021-12-28 00:11:52,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 00:11:52,419 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 3 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:11:52,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 116 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:11:52,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-28 00:11:52,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-12-28 00:11:52,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 44 states have (on average 1.25) internal successors, (55), 46 states have internal predecessors, (55), 20 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-28 00:11:52,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 94 transitions. [2021-12-28 00:11:52,441 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 94 transitions. Word has length 26 [2021-12-28 00:11:52,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:11:52,441 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 94 transitions. [2021-12-28 00:11:52,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 00:11:52,442 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 94 transitions. [2021-12-28 00:11:52,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-28 00:11:52,443 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:11:52,443 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:11:52,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 00:11:52,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:11:52,659 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:11:52,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:11:52,660 INFO L85 PathProgramCache]: Analyzing trace with hash 2012484164, now seen corresponding path program 1 times [2021-12-28 00:11:52,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:11:52,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122155956] [2021-12-28 00:11:52,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:11:52,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:11:52,670 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:11:52,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1275735591] [2021-12-28 00:11:52,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:11:52,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:11:52,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:11:52,672 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:11:52,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 00:11:52,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:11:52,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-28 00:11:52,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:11:52,847 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-28 00:11:52,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 00:11:52,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:11:52,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122155956] [2021-12-28 00:11:52,848 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:11:52,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275735591] [2021-12-28 00:11:52,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275735591] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:11:52,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:11:52,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 00:11:52,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833759886] [2021-12-28 00:11:52,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:11:52,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 00:11:52,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:11:52,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 00:11:52,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 00:11:52,851 INFO L87 Difference]: Start difference. First operand 70 states and 94 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-28 00:11:52,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:11:52,940 INFO L93 Difference]: Finished difference Result 76 states and 99 transitions. [2021-12-28 00:11:52,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 00:11:52,945 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2021-12-28 00:11:52,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:11:52,948 INFO L225 Difference]: With dead ends: 76 [2021-12-28 00:11:52,948 INFO L226 Difference]: Without dead ends: 74 [2021-12-28 00:11:52,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-28 00:11:52,951 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 31 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:11:52,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 118 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:11:52,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-28 00:11:52,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-12-28 00:11:52,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-28 00:11:52,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2021-12-28 00:11:52,972 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 33 [2021-12-28 00:11:52,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:11:52,975 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2021-12-28 00:11:52,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-28 00:11:52,975 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2021-12-28 00:11:52,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-28 00:11:52,977 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:11:52,978 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:11:53,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 00:11:53,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:11:53,204 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:11:53,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:11:53,204 INFO L85 PathProgramCache]: Analyzing trace with hash -2020901362, now seen corresponding path program 1 times [2021-12-28 00:11:53,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:11:53,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103945667] [2021-12-28 00:11:53,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:11:53,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:11:53,216 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:11:53,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740286993] [2021-12-28 00:11:53,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:11:53,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:11:53,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:11:53,220 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:11:53,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 00:11:53,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:11:53,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-28 00:11:53,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:11:53,390 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-28 00:11:53,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:11:53,588 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-28 00:11:53,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:11:53,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103945667] [2021-12-28 00:11:53,589 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:11:53,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740286993] [2021-12-28 00:11:53,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740286993] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 00:11:53,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 00:11:53,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-12-28 00:11:53,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472382984] [2021-12-28 00:11:53,590 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 00:11:53,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 00:11:53,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:11:53,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 00:11:53,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-28 00:11:53,591 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-28 00:11:53,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:11:53,708 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2021-12-28 00:11:53,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 00:11:53,708 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 39 [2021-12-28 00:11:53,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:11:53,709 INFO L225 Difference]: With dead ends: 80 [2021-12-28 00:11:53,709 INFO L226 Difference]: Without dead ends: 78 [2021-12-28 00:11:53,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-12-28 00:11:53,710 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 32 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 00:11:53,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 98 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 00:11:53,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-28 00:11:53,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-12-28 00:11:53,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 50 states have (on average 1.22) internal successors, (61), 52 states have internal predecessors, (61), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-28 00:11:53,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2021-12-28 00:11:53,721 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 39 [2021-12-28 00:11:53,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:11:53,721 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2021-12-28 00:11:53,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-28 00:11:53,722 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2021-12-28 00:11:53,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-28 00:11:53,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:11:53,723 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:11:53,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 00:11:53,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:11:53,940 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:11:53,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:11:53,940 INFO L85 PathProgramCache]: Analyzing trace with hash 803844641, now seen corresponding path program 1 times [2021-12-28 00:11:53,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:11:53,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532475684] [2021-12-28 00:11:53,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:11:53,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:11:53,949 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:11:53,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1082246840] [2021-12-28 00:11:53,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:11:53,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:11:53,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:11:53,956 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:11:53,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 00:11:53,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:11:53,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-28 00:11:53,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:11:54,100 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-28 00:11:54,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:11:54,220 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-28 00:11:54,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:11:54,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532475684] [2021-12-28 00:11:54,220 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:11:54,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082246840] [2021-12-28 00:11:54,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082246840] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 00:11:54,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 00:11:54,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-12-28 00:11:54,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794527953] [2021-12-28 00:11:54,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 00:11:54,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 00:11:54,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:11:54,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 00:11:54,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-28 00:11:54,222 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-28 00:11:54,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:11:54,414 INFO L93 Difference]: Finished difference Result 249 states and 303 transitions. [2021-12-28 00:11:54,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 00:11:54,415 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 42 [2021-12-28 00:11:54,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:11:54,418 INFO L225 Difference]: With dead ends: 249 [2021-12-28 00:11:54,418 INFO L226 Difference]: Without dead ends: 242 [2021-12-28 00:11:54,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-12-28 00:11:54,420 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 112 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 00:11:54,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 205 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 00:11:54,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-12-28 00:11:54,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 231. [2021-12-28 00:11:54,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 150 states have (on average 1.1933333333333334) internal successors, (179), 158 states have internal predecessors, (179), 54 states have call successors, (54), 26 states have call predecessors, (54), 26 states have return successors, (50), 46 states have call predecessors, (50), 50 states have call successors, (50) [2021-12-28 00:11:54,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 283 transitions. [2021-12-28 00:11:54,461 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 283 transitions. Word has length 42 [2021-12-28 00:11:54,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:11:54,462 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 283 transitions. [2021-12-28 00:11:54,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-28 00:11:54,462 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 283 transitions. [2021-12-28 00:11:54,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-28 00:11:54,463 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:11:54,464 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:11:54,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-28 00:11:54,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:11:54,691 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:11:54,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:11:54,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1528082637, now seen corresponding path program 1 times [2021-12-28 00:11:54,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:11:54,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871839361] [2021-12-28 00:11:54,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:11:54,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:11:54,700 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:11:54,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [283231254] [2021-12-28 00:11:54,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:11:54,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:11:54,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:11:54,701 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:11:54,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 00:11:54,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:11:54,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-28 00:11:54,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:11:54,943 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-28 00:11:54,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:11:55,086 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-28 00:11:55,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:11:55,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871839361] [2021-12-28 00:11:55,087 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:11:55,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283231254] [2021-12-28 00:11:55,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283231254] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 00:11:55,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 00:11:55,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-28 00:11:55,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911870626] [2021-12-28 00:11:55,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 00:11:55,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 00:11:55,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:11:55,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 00:11:55,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-28 00:11:55,091 INFO L87 Difference]: Start difference. First operand 231 states and 283 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-28 00:11:55,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:11:55,333 INFO L93 Difference]: Finished difference Result 259 states and 314 transitions. [2021-12-28 00:11:55,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 00:11:55,334 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 47 [2021-12-28 00:11:55,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:11:55,334 INFO L225 Difference]: With dead ends: 259 [2021-12-28 00:11:55,334 INFO L226 Difference]: Without dead ends: 0 [2021-12-28 00:11:55,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-12-28 00:11:55,336 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 56 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 00:11:55,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 170 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 00:11:55,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-28 00:11:55,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-28 00:11:55,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 00:11:55,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-28 00:11:55,337 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 47 [2021-12-28 00:11:55,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:11:55,337 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-28 00:11:55,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-28 00:11:55,338 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-28 00:11:55,338 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-28 00:11:55,340 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-28 00:11:55,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-28 00:11:55,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-28 00:11:55,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-28 00:11:56,055 INFO L861 garLoopResultBuilder]: At program point L64(lines 23 65) the Hoare annotation is: true [2021-12-28 00:11:56,055 INFO L854 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~y~0#1|))) (and (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~x~0#1| (+ |ULTIMATE.start_main_~r~0#1| .cse0)) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= 1 |ULTIMATE.start_main_~r~0#1|) (= (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~x~0#1|) (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|) |ULTIMATE.start_main_~r~0#1| .cse0)))) [2021-12-28 00:11:56,055 INFO L858 garLoopResultBuilder]: For program point L11(lines 11 13) no Hoare annotation was computed. [2021-12-28 00:11:56,055 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-28 00:11:56,055 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-28 00:11:56,055 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-28 00:11:56,056 INFO L858 garLoopResultBuilder]: For program point L49(lines 46 58) no Hoare annotation was computed. [2021-12-28 00:11:56,056 INFO L858 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2021-12-28 00:11:56,056 INFO L858 garLoopResultBuilder]: For program point L37-1(lines 37 61) no Hoare annotation was computed. [2021-12-28 00:11:56,056 INFO L854 garLoopResultBuilder]: At program point L37-3(lines 37 61) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~y~0#1|))) (and (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~x~0#1| (+ |ULTIMATE.start_main_~r~0#1| .cse0)) (<= 1 |ULTIMATE.start_main_~y~0#1|) (= (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~x~0#1|) (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|) |ULTIMATE.start_main_~r~0#1| .cse0)))) [2021-12-28 00:11:56,056 INFO L854 garLoopResultBuilder]: At program point L37-4(lines 37 61) the Hoare annotation is: (or (and (= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~q~0#1| 0)) (let ((.cse0 (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~y~0#1|))) (and (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~x~0#1| (+ |ULTIMATE.start_main_~r~0#1| .cse0)) (<= 1 |ULTIMATE.start_main_~y~0#1|) (= (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~x~0#1|) (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|) |ULTIMATE.start_main_~r~0#1| .cse0))))) [2021-12-28 00:11:56,056 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-28 00:11:56,056 INFO L854 garLoopResultBuilder]: At program point L54(line 54) the Hoare annotation is: (let ((.cse1 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse0 (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~y~0#1|))) (and (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~x~0#1| (+ |ULTIMATE.start_main_~r~0#1| .cse0)) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= 1 |ULTIMATE.start_main_~r~0#1|) (<= (* .cse1 2) |ULTIMATE.start_main_~r~0#1|) (= (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~x~0#1|) (+ .cse1 |ULTIMATE.start_main_~r~0#1| .cse0)))) [2021-12-28 00:11:56,056 INFO L858 garLoopResultBuilder]: For program point L54-1(line 54) no Hoare annotation was computed. [2021-12-28 00:11:56,056 INFO L858 garLoopResultBuilder]: For program point L46-1(lines 46 58) no Hoare annotation was computed. [2021-12-28 00:11:56,056 INFO L854 garLoopResultBuilder]: At program point L46-3(lines 46 58) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|))) (and (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= .cse0 |ULTIMATE.start_main_~b~0#1|) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= 1 |ULTIMATE.start_main_~r~0#1|) (= (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~x~0#1|) (+ .cse0 |ULTIMATE.start_main_~r~0#1| (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~y~0#1|))))) [2021-12-28 00:11:56,057 INFO L858 garLoopResultBuilder]: For program point L46-4(lines 46 58) no Hoare annotation was computed. [2021-12-28 00:11:56,057 INFO L854 garLoopResultBuilder]: At program point L38(line 38) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~y~0#1|))) (and (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~x~0#1| (+ |ULTIMATE.start_main_~r~0#1| .cse0)) (<= 1 |ULTIMATE.start_main_~y~0#1|) (= (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~x~0#1|) (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|) |ULTIMATE.start_main_~r~0#1| .cse0)))) [2021-12-28 00:11:56,057 INFO L854 garLoopResultBuilder]: At program point L38-1(line 38) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~y~0#1|))) (and (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~x~0#1| (+ |ULTIMATE.start_main_~r~0#1| .cse0)) (<= 1 |ULTIMATE.start_main_~y~0#1|) (= (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~x~0#1|) (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|) |ULTIMATE.start_main_~r~0#1| .cse0)))) [2021-12-28 00:11:56,057 INFO L858 garLoopResultBuilder]: For program point L63(line 63) no Hoare annotation was computed. [2021-12-28 00:11:56,057 INFO L854 garLoopResultBuilder]: At program point L47(line 47) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~y~0#1|))) (and (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~x~0#1| (+ |ULTIMATE.start_main_~r~0#1| .cse0)) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= 1 |ULTIMATE.start_main_~r~0#1|) (= (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~x~0#1|) (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|) |ULTIMATE.start_main_~r~0#1| .cse0)))) [2021-12-28 00:11:56,057 INFO L854 garLoopResultBuilder]: At program point L47-1(line 47) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~y~0#1|))) (and (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~x~0#1| (+ |ULTIMATE.start_main_~r~0#1| .cse0)) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= 1 |ULTIMATE.start_main_~r~0#1|) (= (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~x~0#1|) (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|) |ULTIMATE.start_main_~r~0#1| .cse0)))) [2021-12-28 00:11:56,057 INFO L858 garLoopResultBuilder]: For program point L39(lines 37 61) no Hoare annotation was computed. [2021-12-28 00:11:56,057 INFO L858 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-12-28 00:11:56,057 INFO L858 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-12-28 00:11:56,058 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-12-28 00:11:56,058 INFO L858 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-12-28 00:11:56,058 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-12-28 00:11:56,058 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-12-28 00:11:56,060 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:11:56,061 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-28 00:11:56,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.12 12:11:56 BoogieIcfgContainer [2021-12-28 00:11:56,072 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-28 00:11:56,073 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-28 00:11:56,073 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-28 00:11:56,073 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-28 00:11:56,073 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 12:11:50" (3/4) ... [2021-12-28 00:11:56,075 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-28 00:11:56,080 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-12-28 00:11:56,083 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-12-28 00:11:56,083 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-28 00:11:56,083 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-28 00:11:56,083 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-28 00:11:56,116 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-28 00:11:56,116 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-28 00:11:56,117 INFO L158 Benchmark]: Toolchain (without parser) took 6437.91ms. Allocated memory was 52.4MB in the beginning and 79.7MB in the end (delta: 27.3MB). Free memory was 30.0MB in the beginning and 36.2MB in the end (delta: -6.2MB). Peak memory consumption was 20.6MB. Max. memory is 16.1GB. [2021-12-28 00:11:56,117 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 52.4MB. Free memory was 34.7MB in the beginning and 34.7MB in the end (delta: 46.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-28 00:11:56,117 INFO L158 Benchmark]: CACSL2BoogieTranslator took 249.64ms. Allocated memory is still 52.4MB. Free memory was 29.8MB in the beginning and 31.0MB in the end (delta: -1.2MB). Peak memory consumption was 5.1MB. Max. memory is 16.1GB. [2021-12-28 00:11:56,118 INFO L158 Benchmark]: Boogie Procedure Inliner took 75.82ms. Allocated memory was 52.4MB in the beginning and 65.0MB in the end (delta: 12.6MB). Free memory was 31.0MB in the beginning and 49.1MB in the end (delta: -18.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-28 00:11:56,118 INFO L158 Benchmark]: Boogie Preprocessor took 36.22ms. Allocated memory is still 65.0MB. Free memory was 49.1MB in the beginning and 48.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-28 00:11:56,119 INFO L158 Benchmark]: RCFGBuilder took 306.59ms. Allocated memory is still 65.0MB. Free memory was 48.0MB in the beginning and 38.2MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-28 00:11:56,119 INFO L158 Benchmark]: TraceAbstraction took 5719.21ms. Allocated memory was 65.0MB in the beginning and 79.7MB in the end (delta: 14.7MB). Free memory was 37.7MB in the beginning and 39.6MB in the end (delta: -1.9MB). Peak memory consumption was 32.7MB. Max. memory is 16.1GB. [2021-12-28 00:11:56,119 INFO L158 Benchmark]: Witness Printer took 43.60ms. Allocated memory is still 79.7MB. Free memory was 39.6MB in the beginning and 36.2MB in the end (delta: 3.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-28 00:11:56,121 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 52.4MB. Free memory was 34.7MB in the beginning and 34.7MB in the end (delta: 46.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 249.64ms. Allocated memory is still 52.4MB. Free memory was 29.8MB in the beginning and 31.0MB in the end (delta: -1.2MB). Peak memory consumption was 5.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 75.82ms. Allocated memory was 52.4MB in the beginning and 65.0MB in the end (delta: 12.6MB). Free memory was 31.0MB in the beginning and 49.1MB in the end (delta: -18.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.22ms. Allocated memory is still 65.0MB. Free memory was 49.1MB in the beginning and 48.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 306.59ms. Allocated memory is still 65.0MB. Free memory was 48.0MB in the beginning and 38.2MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 5719.21ms. Allocated memory was 65.0MB in the beginning and 79.7MB in the end (delta: 14.7MB). Free memory was 37.7MB in the beginning and 39.6MB in the end (delta: -1.9MB). Peak memory consumption was 32.7MB. Max. memory is 16.1GB. * Witness Printer took 43.60ms. Allocated memory is still 79.7MB. Free memory was 39.6MB in the beginning and 36.2MB in the end (delta: 3.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.6s, OverallIterations: 10, TraceHistogramMax: 7, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 282 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 266 mSDsluCounter, 1196 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 849 mSDsCounter, 165 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 557 IncrementalHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 165 mSolverCounterUnsat, 347 mSDtfsCounter, 557 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 374 GetRequests, 312 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=231occurred in iteration=9, InterpolantAutomatonStates: 62, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 22 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 90 PreInvPairs, 171 NumberOfFragments, 264 HoareAnnotationTreeSize, 90 FomulaSimplifications, 3 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 2967 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 254 NumberOfCodeBlocks, 254 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 369 ConstructedInterpolants, 0 QuantifiedInterpolants, 998 SizeOfPredicates, 21 NumberOfNonLiveVariables, 779 ConjunctsInSsa, 66 ConjunctsInUnsatCore, 13 InterpolantComputations, 7 PerfectInterpolantSequences, 358/408 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: (((cond == 1 && a * y == b) && 1 <= y) && 1 <= r) && b + x == a * y + r + q * y - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: ((cond == 1 && x == r + q * y) && 1 <= y) && b + x == a * y + r + q * y RESULT: Ultimate proved your program to be correct! [2021-12-28 00:11:56,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE