./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/lcm2_valuebound50.c --full-output -ea --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 03d7b7b3 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -ea -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/lcm2_valuebound50.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 f07dfd29134e87fb8840c55cea4fca74cbf39cfbb92d83a07db93f4706876200 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-03d7b7b [2022-02-20 17:36:44,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-20 17:36:44,341 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-20 17:36:44,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-20 17:36:44,365 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-20 17:36:44,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-20 17:36:44,370 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-20 17:36:44,372 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-20 17:36:44,374 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-20 17:36:44,374 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-20 17:36:44,375 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-20 17:36:44,375 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-20 17:36:44,376 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-20 17:36:44,378 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-20 17:36:44,379 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-20 17:36:44,380 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-20 17:36:44,381 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-20 17:36:44,386 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-20 17:36:44,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-20 17:36:44,390 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-20 17:36:44,393 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-20 17:36:44,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-20 17:36:44,395 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-20 17:36:44,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-20 17:36:44,397 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-20 17:36:44,398 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-20 17:36:44,398 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-20 17:36:44,399 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-20 17:36:44,399 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-20 17:36:44,400 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-20 17:36:44,400 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-20 17:36:44,401 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-20 17:36:44,401 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-20 17:36:44,402 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-20 17:36:44,403 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-20 17:36:44,403 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-20 17:36:44,404 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-20 17:36:44,404 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-20 17:36:44,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-20 17:36:44,405 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-20 17:36:44,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-20 17:36:44,406 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-02-20 17:36:44,429 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-20 17:36:44,429 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-20 17:36:44,430 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-20 17:36:44,430 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-20 17:36:44,431 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-20 17:36:44,431 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-20 17:36:44,431 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-20 17:36:44,432 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-20 17:36:44,432 INFO L138 SettingsManager]: * Use SBE=true [2022-02-20 17:36:44,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-20 17:36:44,432 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-20 17:36:44,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-20 17:36:44,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-20 17:36:44,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-20 17:36:44,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-20 17:36:44,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-20 17:36:44,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-20 17:36:44,434 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-20 17:36:44,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-20 17:36:44,434 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-20 17:36:44,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-20 17:36:44,434 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-20 17:36:44,434 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-20 17:36:44,434 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-20 17:36:44,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-20 17:36:44,435 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-20 17:36:44,435 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-20 17:36:44,436 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-20 17:36:44,436 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-20 17:36:44,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-20 17:36:44,436 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-20 17:36:44,436 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-02-20 17:36:44,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-20 17:36:44,437 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f07dfd29134e87fb8840c55cea4fca74cbf39cfbb92d83a07db93f4706876200 [2022-02-20 17:36:44,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-20 17:36:44,606 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-20 17:36:44,608 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-20 17:36:44,609 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-20 17:36:44,609 INFO L275 PluginConnector]: CDTParser initialized [2022-02-20 17:36:44,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/lcm2_valuebound50.c [2022-02-20 17:36:44,655 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f488596a1/cffd0de682e3470396f9afcd7d397153/FLAGd1d425e46 [2022-02-20 17:36:44,980 INFO L306 CDTParser]: Found 1 translation units. [2022-02-20 17:36:44,980 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/lcm2_valuebound50.c [2022-02-20 17:36:44,988 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f488596a1/cffd0de682e3470396f9afcd7d397153/FLAGd1d425e46 [2022-02-20 17:36:45,412 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f488596a1/cffd0de682e3470396f9afcd7d397153 [2022-02-20 17:36:45,414 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-20 17:36:45,415 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-02-20 17:36:45,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-20 17:36:45,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-20 17:36:45,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-20 17:36:45,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 05:36:45" (1/1) ... [2022-02-20 17:36:45,419 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78a09803 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:36:45, skipping insertion in model container [2022-02-20 17:36:45,419 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 05:36:45" (1/1) ... [2022-02-20 17:36:45,424 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-20 17:36:45,433 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-20 17:36:45,565 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/lcm2_valuebound50.c[537,550] [2022-02-20 17:36:45,589 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-20 17:36:45,600 INFO L203 MainTranslator]: Completed pre-run [2022-02-20 17:36:45,612 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/lcm2_valuebound50.c[537,550] [2022-02-20 17:36:45,629 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-20 17:36:45,639 INFO L208 MainTranslator]: Completed translation [2022-02-20 17:36:45,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:36:45 WrapperNode [2022-02-20 17:36:45,640 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-20 17:36:45,641 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-20 17:36:45,641 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-20 17:36:45,642 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-20 17:36:45,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:36:45" (1/1) ... [2022-02-20 17:36:45,651 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:36:45" (1/1) ... [2022-02-20 17:36:45,675 INFO L137 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 52 [2022-02-20 17:36:45,676 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-20 17:36:45,676 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-20 17:36:45,676 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-20 17:36:45,677 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-20 17:36:45,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:36:45" (1/1) ... [2022-02-20 17:36:45,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:36:45" (1/1) ... [2022-02-20 17:36:45,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:36:45" (1/1) ... [2022-02-20 17:36:45,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:36:45" (1/1) ... [2022-02-20 17:36:45,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:36:45" (1/1) ... [2022-02-20 17:36:45,706 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:36:45" (1/1) ... [2022-02-20 17:36:45,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:36:45" (1/1) ... [2022-02-20 17:36:45,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-20 17:36:45,708 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-20 17:36:45,708 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-20 17:36:45,708 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-20 17:36:45,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:36:45" (1/1) ... [2022-02-20 17:36:45,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-20 17:36:45,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-20 17:36:45,729 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-20 17:36:45,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-20 17:36:45,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-20 17:36:45,773 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-20 17:36:45,786 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-20 17:36:45,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-20 17:36:45,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-20 17:36:45,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-20 17:36:45,786 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-20 17:36:45,787 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-20 17:36:45,839 INFO L234 CfgBuilder]: Building ICFG [2022-02-20 17:36:45,840 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-20 17:36:46,003 INFO L275 CfgBuilder]: Performing block encoding [2022-02-20 17:36:46,007 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-20 17:36:46,008 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-20 17:36:46,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 05:36:46 BoogieIcfgContainer [2022-02-20 17:36:46,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-20 17:36:46,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-20 17:36:46,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-20 17:36:46,028 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-20 17:36:46,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.02 05:36:45" (1/3) ... [2022-02-20 17:36:46,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b97467d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 05:36:46, skipping insertion in model container [2022-02-20 17:36:46,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:36:45" (2/3) ... [2022-02-20 17:36:46,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b97467d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 05:36:46, skipping insertion in model container [2022-02-20 17:36:46,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 05:36:46" (3/3) ... [2022-02-20 17:36:46,030 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm2_valuebound50.c [2022-02-20 17:36:46,033 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-20 17:36:46,033 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-20 17:36:46,089 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-20 17:36:46,096 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 [2022-02-20 17:36:46,098 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-20 17:36:46,118 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-20 17:36:46,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-20 17:36:46,122 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 17:36:46,123 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-20 17:36:46,123 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 17:36:46,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 17:36:46,129 INFO L85 PathProgramCache]: Analyzing trace with hash 902207739, now seen corresponding path program 1 times [2022-02-20 17:36:46,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-20 17:36:46,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019671151] [2022-02-20 17:36:46,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 17:36:46,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-20 17:36:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 17:36:46,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-20 17:36:46,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 17:36:46,295 INFO L290 TraceCheckUtils]: 0: Hoare triple {32#true} ~cond := #in~cond; {32#true} is VALID [2022-02-20 17:36:46,296 INFO L290 TraceCheckUtils]: 1: Hoare triple {32#true} assume 0 == ~cond;assume false; {33#false} is VALID [2022-02-20 17:36:46,296 INFO L290 TraceCheckUtils]: 2: Hoare triple {33#false} assume true; {33#false} is VALID [2022-02-20 17:36:46,296 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {33#false} {32#true} #60#return; {33#false} is VALID [2022-02-20 17:36:46,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-20 17:36:46,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 17:36:46,308 INFO L290 TraceCheckUtils]: 0: Hoare triple {32#true} ~cond := #in~cond; {32#true} is VALID [2022-02-20 17:36:46,309 INFO L290 TraceCheckUtils]: 1: Hoare triple {32#true} assume 0 == ~cond;assume false; {33#false} is VALID [2022-02-20 17:36:46,309 INFO L290 TraceCheckUtils]: 2: Hoare triple {33#false} assume true; {33#false} is VALID [2022-02-20 17:36:46,309 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {33#false} {33#false} #62#return; {33#false} is VALID [2022-02-20 17:36:46,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-20 17:36:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 17:36:46,322 INFO L290 TraceCheckUtils]: 0: Hoare triple {32#true} ~cond := #in~cond; {32#true} is VALID [2022-02-20 17:36:46,322 INFO L290 TraceCheckUtils]: 1: Hoare triple {32#true} assume 0 == ~cond;assume false; {33#false} is VALID [2022-02-20 17:36:46,322 INFO L290 TraceCheckUtils]: 2: Hoare triple {33#false} assume true; {33#false} is VALID [2022-02-20 17:36:46,323 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {33#false} {33#false} #64#return; {33#false} is VALID [2022-02-20 17:36:46,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-20 17:36:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 17:36:46,335 INFO L290 TraceCheckUtils]: 0: Hoare triple {32#true} ~cond := #in~cond; {32#true} is VALID [2022-02-20 17:36:46,336 INFO L290 TraceCheckUtils]: 1: Hoare triple {32#true} assume 0 == ~cond;assume false; {33#false} is VALID [2022-02-20 17:36:46,336 INFO L290 TraceCheckUtils]: 2: Hoare triple {33#false} assume true; {33#false} is VALID [2022-02-20 17:36:46,336 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {33#false} {33#false} #66#return; {33#false} is VALID [2022-02-20 17:36:46,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-20 17:36:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 17:36:46,346 INFO L290 TraceCheckUtils]: 0: Hoare triple {32#true} ~cond := #in~cond; {32#true} is VALID [2022-02-20 17:36:46,347 INFO L290 TraceCheckUtils]: 1: Hoare triple {32#true} assume 0 == ~cond;assume false; {33#false} is VALID [2022-02-20 17:36:46,347 INFO L290 TraceCheckUtils]: 2: Hoare triple {33#false} assume true; {33#false} is VALID [2022-02-20 17:36:46,347 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {33#false} {33#false} #68#return; {33#false} is VALID [2022-02-20 17:36:46,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-20 17:36:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 17:36:46,365 INFO L290 TraceCheckUtils]: 0: Hoare triple {32#true} ~cond := #in~cond; {32#true} is VALID [2022-02-20 17:36:46,366 INFO L290 TraceCheckUtils]: 1: Hoare triple {32#true} assume 0 == ~cond;assume false; {33#false} is VALID [2022-02-20 17:36:46,366 INFO L290 TraceCheckUtils]: 2: Hoare triple {33#false} assume true; {33#false} is VALID [2022-02-20 17:36:46,366 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {33#false} {33#false} #70#return; {33#false} is VALID [2022-02-20 17:36:46,366 INFO L290 TraceCheckUtils]: 0: Hoare triple {32#true} assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(7, 2);call write~init~int(108, 2, 0, 1);call write~init~int(99, 2, 1, 1);call write~init~int(109, 2, 2, 1);call write~init~int(50, 2, 3, 1);call write~init~int(46, 2, 4, 1);call write~init~int(99, 2, 5, 1);call write~init~int(0, 2, 6, 1);call #Ultimate.allocInit(12, 3); {32#true} is VALID [2022-02-20 17:36:46,367 INFO L290 TraceCheckUtils]: 1: Hoare triple {32#true} assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet4#1, main_#t~nondet5#1, main_~a~0#1, main_~b~0#1, main_~x~0#1, main_~y~0#1, main_~u~0#1, main_~v~0#1;havoc main_~a~0#1;havoc main_~b~0#1;havoc main_~x~0#1;havoc main_~y~0#1;havoc main_~u~0#1;havoc main_~v~0#1;main_~a~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1; {32#true} is VALID [2022-02-20 17:36:46,367 INFO L272 TraceCheckUtils]: 2: Hoare triple {32#true} call assume_abort_if_not((if main_~a~0#1 % 4294967296 >= 0 && main_~a~0#1 % 4294967296 <= 50 then 1 else 0)); {32#true} is VALID [2022-02-20 17:36:46,367 INFO L290 TraceCheckUtils]: 3: Hoare triple {32#true} ~cond := #in~cond; {32#true} is VALID [2022-02-20 17:36:46,367 INFO L290 TraceCheckUtils]: 4: Hoare triple {32#true} assume 0 == ~cond;assume false; {33#false} is VALID [2022-02-20 17:36:46,368 INFO L290 TraceCheckUtils]: 5: Hoare triple {33#false} assume true; {33#false} is VALID [2022-02-20 17:36:46,369 INFO L284 TraceCheckUtils]: 6: Hoare quadruple {33#false} {32#true} #60#return; {33#false} is VALID [2022-02-20 17:36:46,370 INFO L290 TraceCheckUtils]: 7: Hoare triple {33#false} main_~b~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; {33#false} is VALID [2022-02-20 17:36:46,370 INFO L272 TraceCheckUtils]: 8: Hoare triple {33#false} call assume_abort_if_not((if main_~b~0#1 % 4294967296 >= 0 && main_~b~0#1 % 4294967296 <= 50 then 1 else 0)); {32#true} is VALID [2022-02-20 17:36:46,370 INFO L290 TraceCheckUtils]: 9: Hoare triple {32#true} ~cond := #in~cond; {32#true} is VALID [2022-02-20 17:36:46,370 INFO L290 TraceCheckUtils]: 10: Hoare triple {32#true} assume 0 == ~cond;assume false; {33#false} is VALID [2022-02-20 17:36:46,371 INFO L290 TraceCheckUtils]: 11: Hoare triple {33#false} assume true; {33#false} is VALID [2022-02-20 17:36:46,371 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {33#false} {33#false} #62#return; {33#false} is VALID [2022-02-20 17:36:46,371 INFO L272 TraceCheckUtils]: 13: Hoare triple {33#false} call assume_abort_if_not((if main_~a~0#1 % 4294967296 >= 1 then 1 else 0)); {32#true} is VALID [2022-02-20 17:36:46,371 INFO L290 TraceCheckUtils]: 14: Hoare triple {32#true} ~cond := #in~cond; {32#true} is VALID [2022-02-20 17:36:46,372 INFO L290 TraceCheckUtils]: 15: Hoare triple {32#true} assume 0 == ~cond;assume false; {33#false} is VALID [2022-02-20 17:36:46,372 INFO L290 TraceCheckUtils]: 16: Hoare triple {33#false} assume true; {33#false} is VALID [2022-02-20 17:36:46,372 INFO L284 TraceCheckUtils]: 17: Hoare quadruple {33#false} {33#false} #64#return; {33#false} is VALID [2022-02-20 17:36:46,373 INFO L272 TraceCheckUtils]: 18: Hoare triple {33#false} call assume_abort_if_not((if main_~b~0#1 % 4294967296 >= 1 then 1 else 0)); {32#true} is VALID [2022-02-20 17:36:46,373 INFO L290 TraceCheckUtils]: 19: Hoare triple {32#true} ~cond := #in~cond; {32#true} is VALID [2022-02-20 17:36:46,374 INFO L290 TraceCheckUtils]: 20: Hoare triple {32#true} assume 0 == ~cond;assume false; {33#false} is VALID [2022-02-20 17:36:46,374 INFO L290 TraceCheckUtils]: 21: Hoare triple {33#false} assume true; {33#false} is VALID [2022-02-20 17:36:46,374 INFO L284 TraceCheckUtils]: 22: Hoare quadruple {33#false} {33#false} #66#return; {33#false} is VALID [2022-02-20 17:36:46,375 INFO L272 TraceCheckUtils]: 23: Hoare triple {33#false} call assume_abort_if_not((if main_~a~0#1 % 4294967296 <= 65535 then 1 else 0)); {32#true} is VALID [2022-02-20 17:36:46,378 INFO L290 TraceCheckUtils]: 24: Hoare triple {32#true} ~cond := #in~cond; {32#true} is VALID [2022-02-20 17:36:46,378 INFO L290 TraceCheckUtils]: 25: Hoare triple {32#true} assume 0 == ~cond;assume false; {33#false} is VALID [2022-02-20 17:36:46,378 INFO L290 TraceCheckUtils]: 26: Hoare triple {33#false} assume true; {33#false} is VALID [2022-02-20 17:36:46,378 INFO L284 TraceCheckUtils]: 27: Hoare quadruple {33#false} {33#false} #68#return; {33#false} is VALID [2022-02-20 17:36:46,378 INFO L272 TraceCheckUtils]: 28: Hoare triple {33#false} call assume_abort_if_not((if main_~b~0#1 % 4294967296 <= 65535 then 1 else 0)); {32#true} is VALID [2022-02-20 17:36:46,379 INFO L290 TraceCheckUtils]: 29: Hoare triple {32#true} ~cond := #in~cond; {32#true} is VALID [2022-02-20 17:36:46,379 INFO L290 TraceCheckUtils]: 30: Hoare triple {32#true} assume 0 == ~cond;assume false; {33#false} is VALID [2022-02-20 17:36:46,379 INFO L290 TraceCheckUtils]: 31: Hoare triple {33#false} assume true; {33#false} is VALID [2022-02-20 17:36:46,379 INFO L284 TraceCheckUtils]: 32: Hoare quadruple {33#false} {33#false} #70#return; {33#false} is VALID [2022-02-20 17:36:46,380 INFO L290 TraceCheckUtils]: 33: Hoare triple {33#false} main_~x~0#1 := main_~a~0#1;main_~y~0#1 := main_~b~0#1;main_~u~0#1 := main_~b~0#1;main_~v~0#1 := main_~a~0#1; {33#false} is VALID [2022-02-20 17:36:46,380 INFO L290 TraceCheckUtils]: 34: Hoare triple {33#false} assume !true; {33#false} is VALID [2022-02-20 17:36:46,380 INFO L272 TraceCheckUtils]: 35: Hoare triple {33#false} call __VERIFIER_assert((if (main_~x~0#1 * main_~u~0#1 + main_~y~0#1 * main_~v~0#1) % 4294967296 == 2 * main_~a~0#1 * main_~b~0#1 % 4294967296 then 1 else 0)); {33#false} is VALID [2022-02-20 17:36:46,380 INFO L290 TraceCheckUtils]: 36: Hoare triple {33#false} ~cond := #in~cond; {33#false} is VALID [2022-02-20 17:36:46,380 INFO L290 TraceCheckUtils]: 37: Hoare triple {33#false} assume 0 == ~cond; {33#false} is VALID [2022-02-20 17:36:46,381 INFO L290 TraceCheckUtils]: 38: Hoare triple {33#false} assume !false; {33#false} is VALID [2022-02-20 17:36:46,381 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-20 17:36:46,382 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-20 17:36:46,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019671151] [2022-02-20 17:36:46,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019671151] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-20 17:36:46,384 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-20 17:36:46,384 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-20 17:36:46,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685615465] [2022-02-20 17:36:46,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-20 17:36:46,391 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2022-02-20 17:36:46,392 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-02-20 17:36:46,394 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-20 17:36:46,434 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 24 edges. 24 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 17:36:46,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-02-20 17:36:46,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-20 17:36:46,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-02-20 17:36:46,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-02-20 17:36:46,452 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-20 17:36:46,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 17:36:46,527 INFO L93 Difference]: Finished difference Result 55 states and 84 transitions. [2022-02-20 17:36:46,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-02-20 17:36:46,527 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2022-02-20 17:36:46,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-20 17:36:46,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-20 17:36:46,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 84 transitions. [2022-02-20 17:36:46,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-20 17:36:46,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 84 transitions. [2022-02-20 17:36:46,540 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 2 states and 84 transitions. [2022-02-20 17:36:46,606 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 84 edges. 84 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 17:36:46,611 INFO L225 Difference]: With dead ends: 55 [2022-02-20 17:36:46,611 INFO L226 Difference]: Without dead ends: 25 [2022-02-20 17:36:46,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-02-20 17:36:46,615 INFO L933 BasicCegarLoop]: 36 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, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-20 17:36:46,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-20 17:36:46,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-02-20 17:36:46,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-02-20 17:36:46,633 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-02-20 17:36:46,633 INFO L82 GeneralOperation]: Start isEquivalent. First operand 25 states. Second operand has 25 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-20 17:36:46,634 INFO L74 IsIncluded]: Start isIncluded. First operand 25 states. Second operand has 25 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-20 17:36:46,634 INFO L87 Difference]: Start difference. First operand 25 states. Second operand has 25 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-20 17:36:46,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 17:36:46,638 INFO L93 Difference]: Finished difference Result 25 states and 32 transitions. [2022-02-20 17:36:46,638 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-02-20 17:36:46,638 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 17:36:46,639 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 17:36:46,639 INFO L74 IsIncluded]: Start isIncluded. First operand has 25 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand 25 states. [2022-02-20 17:36:46,639 INFO L87 Difference]: Start difference. First operand has 25 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand 25 states. [2022-02-20 17:36:46,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 17:36:46,642 INFO L93 Difference]: Finished difference Result 25 states and 32 transitions. [2022-02-20 17:36:46,643 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-02-20 17:36:46,643 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 17:36:46,643 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 17:36:46,643 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-02-20 17:36:46,644 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-02-20 17:36:46,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-20 17:36:46,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-02-20 17:36:46,647 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 39 [2022-02-20 17:36:46,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-20 17:36:46,647 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-02-20 17:36:46,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-20 17:36:46,648 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-02-20 17:36:46,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-20 17:36:46,649 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 17:36:46,649 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-20 17:36:46,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-20 17:36:46,649 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 17:36:46,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 17:36:46,650 INFO L85 PathProgramCache]: Analyzing trace with hash -722599373, now seen corresponding path program 1 times [2022-02-20 17:36:46,650 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-20 17:36:46,650 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635050125] [2022-02-20 17:36:46,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 17:36:46,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-20 17:36:46,669 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-20 17:36:46,669 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [389834425] [2022-02-20 17:36:46,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 17:36:46,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-20 17:36:46,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-20 17:36:46,671 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-20 17:36:46,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-20 17:36:46,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 17:36:46,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-20 17:36:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 17:36:46,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-20 17:36:47,174 INFO L290 TraceCheckUtils]: 0: Hoare triple {224#true} assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(7, 2);call write~init~int(108, 2, 0, 1);call write~init~int(99, 2, 1, 1);call write~init~int(109, 2, 2, 1);call write~init~int(50, 2, 3, 1);call write~init~int(46, 2, 4, 1);call write~init~int(99, 2, 5, 1);call write~init~int(0, 2, 6, 1);call #Ultimate.allocInit(12, 3); {224#true} is VALID [2022-02-20 17:36:47,174 INFO L290 TraceCheckUtils]: 1: Hoare triple {224#true} assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet4#1, main_#t~nondet5#1, main_~a~0#1, main_~b~0#1, main_~x~0#1, main_~y~0#1, main_~u~0#1, main_~v~0#1;havoc main_~a~0#1;havoc main_~b~0#1;havoc main_~x~0#1;havoc main_~y~0#1;havoc main_~u~0#1;havoc main_~v~0#1;main_~a~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1; {224#true} is VALID [2022-02-20 17:36:47,174 INFO L272 TraceCheckUtils]: 2: Hoare triple {224#true} call assume_abort_if_not((if main_~a~0#1 % 4294967296 >= 0 && main_~a~0#1 % 4294967296 <= 50 then 1 else 0)); {224#true} is VALID [2022-02-20 17:36:47,174 INFO L290 TraceCheckUtils]: 3: Hoare triple {224#true} ~cond := #in~cond; {224#true} is VALID [2022-02-20 17:36:47,175 INFO L290 TraceCheckUtils]: 4: Hoare triple {224#true} assume !(0 == ~cond); {224#true} is VALID [2022-02-20 17:36:47,175 INFO L290 TraceCheckUtils]: 5: Hoare triple {224#true} assume true; {224#true} is VALID [2022-02-20 17:36:47,175 INFO L284 TraceCheckUtils]: 6: Hoare quadruple {224#true} {224#true} #60#return; {224#true} is VALID [2022-02-20 17:36:47,175 INFO L290 TraceCheckUtils]: 7: Hoare triple {224#true} main_~b~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; {224#true} is VALID [2022-02-20 17:36:47,175 INFO L272 TraceCheckUtils]: 8: Hoare triple {224#true} call assume_abort_if_not((if main_~b~0#1 % 4294967296 >= 0 && main_~b~0#1 % 4294967296 <= 50 then 1 else 0)); {224#true} is VALID [2022-02-20 17:36:47,175 INFO L290 TraceCheckUtils]: 9: Hoare triple {224#true} ~cond := #in~cond; {224#true} is VALID [2022-02-20 17:36:47,176 INFO L290 TraceCheckUtils]: 10: Hoare triple {224#true} assume !(0 == ~cond); {224#true} is VALID [2022-02-20 17:36:47,176 INFO L290 TraceCheckUtils]: 11: Hoare triple {224#true} assume true; {224#true} is VALID [2022-02-20 17:36:47,176 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {224#true} {224#true} #62#return; {224#true} is VALID [2022-02-20 17:36:47,176 INFO L272 TraceCheckUtils]: 13: Hoare triple {224#true} call assume_abort_if_not((if main_~a~0#1 % 4294967296 >= 1 then 1 else 0)); {224#true} is VALID [2022-02-20 17:36:47,177 INFO L290 TraceCheckUtils]: 14: Hoare triple {224#true} ~cond := #in~cond; {224#true} is VALID [2022-02-20 17:36:47,177 INFO L290 TraceCheckUtils]: 15: Hoare triple {224#true} assume !(0 == ~cond); {224#true} is VALID [2022-02-20 17:36:47,177 INFO L290 TraceCheckUtils]: 16: Hoare triple {224#true} assume true; {224#true} is VALID [2022-02-20 17:36:47,177 INFO L284 TraceCheckUtils]: 17: Hoare quadruple {224#true} {224#true} #64#return; {224#true} is VALID [2022-02-20 17:36:47,177 INFO L272 TraceCheckUtils]: 18: Hoare triple {224#true} call assume_abort_if_not((if main_~b~0#1 % 4294967296 >= 1 then 1 else 0)); {224#true} is VALID [2022-02-20 17:36:47,178 INFO L290 TraceCheckUtils]: 19: Hoare triple {224#true} ~cond := #in~cond; {224#true} is VALID [2022-02-20 17:36:47,178 INFO L290 TraceCheckUtils]: 20: Hoare triple {224#true} assume !(0 == ~cond); {224#true} is VALID [2022-02-20 17:36:47,178 INFO L290 TraceCheckUtils]: 21: Hoare triple {224#true} assume true; {224#true} is VALID [2022-02-20 17:36:47,178 INFO L284 TraceCheckUtils]: 22: Hoare quadruple {224#true} {224#true} #66#return; {224#true} is VALID [2022-02-20 17:36:47,178 INFO L272 TraceCheckUtils]: 23: Hoare triple {224#true} call assume_abort_if_not((if main_~a~0#1 % 4294967296 <= 65535 then 1 else 0)); {224#true} is VALID [2022-02-20 17:36:47,179 INFO L290 TraceCheckUtils]: 24: Hoare triple {224#true} ~cond := #in~cond; {224#true} is VALID [2022-02-20 17:36:47,180 INFO L290 TraceCheckUtils]: 25: Hoare triple {224#true} assume !(0 == ~cond); {224#true} is VALID [2022-02-20 17:36:47,180 INFO L290 TraceCheckUtils]: 26: Hoare triple {224#true} assume true; {224#true} is VALID [2022-02-20 17:36:47,180 INFO L284 TraceCheckUtils]: 27: Hoare quadruple {224#true} {224#true} #68#return; {224#true} is VALID [2022-02-20 17:36:47,180 INFO L272 TraceCheckUtils]: 28: Hoare triple {224#true} call assume_abort_if_not((if main_~b~0#1 % 4294967296 <= 65535 then 1 else 0)); {224#true} is VALID [2022-02-20 17:36:47,180 INFO L290 TraceCheckUtils]: 29: Hoare triple {224#true} ~cond := #in~cond; {224#true} is VALID [2022-02-20 17:36:47,181 INFO L290 TraceCheckUtils]: 30: Hoare triple {224#true} assume !(0 == ~cond); {224#true} is VALID [2022-02-20 17:36:47,181 INFO L290 TraceCheckUtils]: 31: Hoare triple {224#true} assume true; {224#true} is VALID [2022-02-20 17:36:47,181 INFO L284 TraceCheckUtils]: 32: Hoare quadruple {224#true} {224#true} #70#return; {224#true} is VALID [2022-02-20 17:36:47,182 INFO L290 TraceCheckUtils]: 33: Hoare triple {224#true} main_~x~0#1 := main_~a~0#1;main_~y~0#1 := main_~b~0#1;main_~u~0#1 := main_~b~0#1;main_~v~0#1 := main_~a~0#1; {328#(and (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~u~0#1|) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|))} is VALID [2022-02-20 17:36:47,182 INFO L290 TraceCheckUtils]: 34: Hoare triple {328#(and (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~u~0#1|) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|))} assume !false; {328#(and (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~u~0#1|) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|))} is VALID [2022-02-20 17:36:47,184 INFO L272 TraceCheckUtils]: 35: Hoare triple {328#(and (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~u~0#1|) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|))} call __VERIFIER_assert((if (main_~x~0#1 * main_~u~0#1 + main_~y~0#1 * main_~v~0#1) % 4294967296 == 2 * main_~a~0#1 * main_~b~0#1 % 4294967296 then 1 else 0)); {335#(= |__VERIFIER_assert_#in~cond| 1)} is VALID [2022-02-20 17:36:47,184 INFO L290 TraceCheckUtils]: 36: Hoare triple {335#(= |__VERIFIER_assert_#in~cond| 1)} ~cond := #in~cond; {339#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-02-20 17:36:47,185 INFO L290 TraceCheckUtils]: 37: Hoare triple {339#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {225#false} is VALID [2022-02-20 17:36:47,185 INFO L290 TraceCheckUtils]: 38: Hoare triple {225#false} assume !false; {225#false} is VALID [2022-02-20 17:36:47,185 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-20 17:36:47,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-20 17:36:47,186 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-20 17:36:47,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635050125] [2022-02-20 17:36:47,186 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-20 17:36:47,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389834425] [2022-02-20 17:36:47,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389834425] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-20 17:36:47,187 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-20 17:36:47,187 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-20 17:36:47,187 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353363237] [2022-02-20 17:36:47,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-20 17:36:47,188 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2022-02-20 17:36:47,188 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-02-20 17:36:47,189 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-20 17:36:47,213 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 24 edges. 24 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 17:36:47,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-20 17:36:47,213 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-20 17:36:47,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-20 17:36:47,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-20 17:36:47,214 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-20 17:36:47,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 17:36:47,369 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2022-02-20 17:36:47,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-20 17:36:47,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2022-02-20 17:36:47,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-20 17:36:47,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-20 17:36:47,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 45 transitions. [2022-02-20 17:36:47,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-20 17:36:47,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 45 transitions. [2022-02-20 17:36:47,375 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states and 45 transitions. [2022-02-20 17:36:47,412 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 45 edges. 45 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 17:36:47,414 INFO L225 Difference]: With dead ends: 36 [2022-02-20 17:36:47,415 INFO L226 Difference]: Without dead ends: 33 [2022-02-20 17:36:47,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-20 17:36:47,416 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-20 17:36:47,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 99 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-20 17:36:47,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-20 17:36:47,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-02-20 17:36:47,420 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-02-20 17:36:47,420 INFO L82 GeneralOperation]: Start isEquivalent. First operand 33 states. Second operand has 32 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-20 17:36:47,421 INFO L74 IsIncluded]: Start isIncluded. First operand 33 states. Second operand has 32 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-20 17:36:47,421 INFO L87 Difference]: Start difference. First operand 33 states. Second operand has 32 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-20 17:36:47,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 17:36:47,424 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-02-20 17:36:47,424 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2022-02-20 17:36:47,424 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 17:36:47,424 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 17:36:47,425 INFO L74 IsIncluded]: Start isIncluded. First operand has 32 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand 33 states. [2022-02-20 17:36:47,425 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand 33 states. [2022-02-20 17:36:47,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 17:36:47,427 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-02-20 17:36:47,427 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2022-02-20 17:36:47,428 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 17:36:47,428 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 17:36:47,428 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-02-20 17:36:47,428 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-02-20 17:36:47,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-20 17:36:47,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-02-20 17:36:47,430 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 39 [2022-02-20 17:36:47,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-20 17:36:47,430 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-02-20 17:36:47,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-20 17:36:47,431 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-02-20 17:36:47,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-20 17:36:47,432 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 17:36:47,432 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-20 17:36:47,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-20 17:36:47,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-20 17:36:47,648 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 17:36:47,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 17:36:47,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1459116230, now seen corresponding path program 1 times [2022-02-20 17:36:47,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-20 17:36:47,649 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004754429] [2022-02-20 17:36:47,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 17:36:47,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-20 17:36:47,667 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-20 17:36:47,667 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1393430712] [2022-02-20 17:36:47,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 17:36:47,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-20 17:36:47,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-20 17:36:47,684 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) [2022-02-20 17:36:47,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process