./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/fermat1-ll_unwindbound2.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 26bf02dce57f3cc9fa9e6af5bd48026588368cec482f21797d4110581d1b8f61 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 15:53:45,739 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 15:53:45,749 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 15:53:45,799 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 15:53:45,799 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 15:53:45,800 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 15:53:45,802 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 15:53:45,804 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 15:53:45,806 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 15:53:45,810 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 15:53:45,811 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 15:53:45,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 15:53:45,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 15:53:45,814 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 15:53:45,815 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 15:53:45,818 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 15:53:45,819 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 15:53:45,820 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 15:53:45,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 15:53:45,826 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 15:53:45,828 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 15:53:45,829 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 15:53:45,830 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 15:53:45,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 15:53:45,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 15:53:45,838 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 15:53:45,839 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 15:53:45,839 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 15:53:45,840 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 15:53:45,840 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 15:53:45,841 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 15:53:45,841 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 15:53:45,842 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 15:53:45,842 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 15:53:45,843 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 15:53:45,843 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 15:53:45,844 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 15:53:45,844 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 15:53:45,844 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 15:53:45,845 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 15:53:45,845 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 15:53:45,847 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 15:53:45,848 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 15:53:45,877 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 15:53:45,877 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 15:53:45,878 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 15:53:45,878 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 15:53:45,878 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 15:53:45,879 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 15:53:45,879 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 15:53:45,879 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 15:53:45,880 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 15:53:45,880 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 15:53:45,881 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 15:53:45,881 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 15:53:45,881 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 15:53:45,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 15:53:45,881 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 15:53:45,882 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 15:53:45,882 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 15:53:45,882 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 15:53:45,882 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 15:53:45,882 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 15:53:45,883 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 15:53:45,883 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 15:53:45,883 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 15:53:45,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 15:53:45,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 15:53:45,885 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 15:53:45,885 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 15:53:45,885 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 15:53:45,885 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 15:53:45,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 15:53:45,886 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 15:53:45,886 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 15:53:45,886 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 15:53:45,886 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 26bf02dce57f3cc9fa9e6af5bd48026588368cec482f21797d4110581d1b8f61 [2022-07-19 15:53:46,127 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 15:53:46,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 15:53:46,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 15:53:46,149 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 15:53:46,149 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 15:53:46,150 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound2.c [2022-07-19 15:53:46,198 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/731950fdb/057421c6761046f1923ae903ab4c522c/FLAGf88aa8775 [2022-07-19 15:53:46,582 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 15:53:46,583 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound2.c [2022-07-19 15:53:46,588 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/731950fdb/057421c6761046f1923ae903ab4c522c/FLAGf88aa8775 [2022-07-19 15:53:46,604 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/731950fdb/057421c6761046f1923ae903ab4c522c [2022-07-19 15:53:46,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 15:53:46,611 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 15:53:46,615 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 15:53:46,616 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 15:53:46,618 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 15:53:46,619 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 03:53:46" (1/1) ... [2022-07-19 15:53:46,620 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6acef2d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:53:46, skipping insertion in model container [2022-07-19 15:53:46,620 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 03:53:46" (1/1) ... [2022-07-19 15:53:46,627 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 15:53:46,642 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 15:53:46,801 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/fermat1-ll_unwindbound2.c[535,548] [2022-07-19 15:53:46,836 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 15:53:46,844 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 15:53:46,857 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/fermat1-ll_unwindbound2.c[535,548] [2022-07-19 15:53:46,880 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 15:53:46,894 INFO L208 MainTranslator]: Completed translation [2022-07-19 15:53:46,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:53:46 WrapperNode [2022-07-19 15:53:46,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 15:53:46,896 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 15:53:46,896 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 15:53:46,896 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 15:53:46,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:53:46" (1/1) ... [2022-07-19 15:53:46,913 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:53:46" (1/1) ... [2022-07-19 15:53:46,933 INFO L137 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-07-19 15:53:46,934 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 15:53:46,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 15:53:46,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 15:53:46,935 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 15:53:46,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:53:46" (1/1) ... [2022-07-19 15:53:46,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:53:46" (1/1) ... [2022-07-19 15:53:46,945 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:53:46" (1/1) ... [2022-07-19 15:53:46,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:53:46" (1/1) ... [2022-07-19 15:53:46,957 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:53:46" (1/1) ... [2022-07-19 15:53:46,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:53:46" (1/1) ... [2022-07-19 15:53:46,968 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:53:46" (1/1) ... [2022-07-19 15:53:46,970 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 15:53:46,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 15:53:46,973 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 15:53:46,973 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 15:53:46,974 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:53:46" (1/1) ... [2022-07-19 15:53:46,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 15:53:46,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:47,004 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 15:53:47,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 15:53:47,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 15:53:47,056 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-19 15:53:47,056 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-19 15:53:47,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 15:53:47,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 15:53:47,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 15:53:47,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-19 15:53:47,057 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-19 15:53:47,109 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 15:53:47,110 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 15:53:47,277 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 15:53:47,282 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 15:53:47,282 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 15:53:47,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 03:53:47 BoogieIcfgContainer [2022-07-19 15:53:47,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 15:53:47,296 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 15:53:47,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 15:53:47,300 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 15:53:47,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 03:53:46" (1/3) ... [2022-07-19 15:53:47,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78707bcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 03:53:47, skipping insertion in model container [2022-07-19 15:53:47,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:53:46" (2/3) ... [2022-07-19 15:53:47,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78707bcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 03:53:47, skipping insertion in model container [2022-07-19 15:53:47,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 03:53:47" (3/3) ... [2022-07-19 15:53:47,302 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound2.c [2022-07-19 15:53:47,314 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 15:53:47,314 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 15:53:47,351 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 15:53:47,357 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5ac7c96f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7c315a3b [2022-07-19 15:53:47,357 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 15:53:47,360 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 15:53:47,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-19 15:53:47,366 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:53:47,366 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:53:47,367 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:53:47,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:53:47,371 INFO L85 PathProgramCache]: Analyzing trace with hash 738208203, now seen corresponding path program 1 times [2022-07-19 15:53:47,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:53:47,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279651748] [2022-07-19 15:53:47,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:47,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:53:47,463 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:53:47,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358731030] [2022-07-19 15:53:47,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:47,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:47,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:47,487 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:53:47,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 15:53:47,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:53:47,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-19 15:53:47,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:53:47,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:53:47,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:53:47,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:53:47,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279651748] [2022-07-19 15:53:47,598 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:53:47,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358731030] [2022-07-19 15:53:47,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358731030] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:53:47,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:53:47,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 15:53:47,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504699678] [2022-07-19 15:53:47,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:53:47,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 15:53:47,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:53:47,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 15:53:47,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 15:53:47,644 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 15:53:47,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:53:47,667 INFO L93 Difference]: Finished difference Result 61 states and 94 transitions. [2022-07-19 15:53:47,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 15:53:47,669 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-07-19 15:53:47,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:53:47,675 INFO L225 Difference]: With dead ends: 61 [2022-07-19 15:53:47,676 INFO L226 Difference]: Without dead ends: 28 [2022-07-19 15:53:47,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 15:53:47,685 INFO L413 NwaCegarLoop]: 41 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, 41 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:53:47,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:53:47,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-19 15:53:47,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-07-19 15:53:47,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-19 15:53:47,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2022-07-19 15:53:47,723 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 18 [2022-07-19 15:53:47,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:53:47,723 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2022-07-19 15:53:47,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 15:53:47,724 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2022-07-19 15:53:47,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-19 15:53:47,726 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:53:47,726 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:53:47,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 15:53:47,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-07-19 15:53:47,943 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:53:47,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:53:47,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1770759922, now seen corresponding path program 1 times [2022-07-19 15:53:47,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:53:47,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581569168] [2022-07-19 15:53:47,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:47,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:53:47,959 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:53:47,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1273097370] [2022-07-19 15:53:47,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:47,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:47,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:47,961 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) [2022-07-19 15:53:47,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 15:53:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:53:48,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 15:53:48,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:53:48,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:53:48,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:53:48,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:53:48,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581569168] [2022-07-19 15:53:48,113 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:53:48,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273097370] [2022-07-19 15:53:48,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273097370] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:53:48,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:53:48,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 15:53:48,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185671641] [2022-07-19 15:53:48,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:53:48,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 15:53:48,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:53:48,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 15:53:48,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 15:53:48,122 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-07-19 15:53:48,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:53:48,139 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-07-19 15:53:48,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 15:53:48,140 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 19 [2022-07-19 15:53:48,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:53:48,141 INFO L225 Difference]: With dead ends: 37 [2022-07-19 15:53:48,141 INFO L226 Difference]: Without dead ends: 30 [2022-07-19 15:53:48,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 15:53:48,143 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:53:48,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:53:48,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-19 15:53:48,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-07-19 15:53:48,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-19 15:53:48,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-07-19 15:53:48,150 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 19 [2022-07-19 15:53:48,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:53:48,152 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-07-19 15:53:48,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-07-19 15:53:48,152 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-07-19 15:53:48,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-19 15:53:48,154 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:53:48,154 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:53:48,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 15:53:48,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-07-19 15:53:48,364 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:53:48,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:53:48,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1769091626, now seen corresponding path program 1 times [2022-07-19 15:53:48,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:53:48,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241276025] [2022-07-19 15:53:48,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:48,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:53:48,378 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:53:48,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1499864174] [2022-07-19 15:53:48,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:48,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:48,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:48,381 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) [2022-07-19 15:53:48,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 15:53:48,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:53:48,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 15:53:48,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:53:48,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:53:48,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:53:48,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:53:48,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241276025] [2022-07-19 15:53:48,737 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:53:48,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499864174] [2022-07-19 15:53:48,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499864174] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:53:48,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:53:48,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 15:53:48,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887806400] [2022-07-19 15:53:48,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:53:48,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 15:53:48,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:53:48,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 15:53:48,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 15:53:48,739 INFO L87 Difference]: Start difference. First operand 30 states and 39 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, (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) [2022-07-19 15:53:53,062 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:53:55,477 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:53:55,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:53:55,504 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2022-07-19 15:53:55,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 15:53:55,505 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, (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 19 [2022-07-19 15:53:55,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:53:55,506 INFO L225 Difference]: With dead ends: 49 [2022-07-19 15:53:55,506 INFO L226 Difference]: Without dead ends: 47 [2022-07-19 15:53:55,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 15:53:55,508 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-07-19 15:53:55,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 100 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-07-19 15:53:55,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-19 15:53:55,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-07-19 15:53:55,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.393939393939394) internal successors, (46), 34 states have internal predecessors, (46), 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) [2022-07-19 15:53:55,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2022-07-19 15:53:55,518 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 19 [2022-07-19 15:53:55,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:53:55,518 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2022-07-19 15:53:55,518 INFO L496 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, (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) [2022-07-19 15:53:55,519 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2022-07-19 15:53:55,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-19 15:53:55,519 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:53:55,520 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:53:55,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 15:53:55,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:55,740 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:53:55,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:53:55,741 INFO L85 PathProgramCache]: Analyzing trace with hash -82041861, now seen corresponding path program 1 times [2022-07-19 15:53:55,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:53:55,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790772021] [2022-07-19 15:53:55,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:55,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:53:55,752 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:53:55,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1989259927] [2022-07-19 15:53:55,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:55,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:55,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:55,760 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) [2022-07-19 15:53:55,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 15:53:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:53:55,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 15:53:55,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:53:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:53:55,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:53:56,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:53:56,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:53:56,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790772021] [2022-07-19 15:53:56,075 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:53:56,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989259927] [2022-07-19 15:53:56,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989259927] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:53:56,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:53:56,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-07-19 15:53:56,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475073325] [2022-07-19 15:53:56,076 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:53:56,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 15:53:56,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:53:56,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 15:53:56,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-19 15:53:56,078 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-19 15:53:56,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:53:56,230 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2022-07-19 15:53:56,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 15:53:56,232 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 25 [2022-07-19 15:53:56,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:53:56,233 INFO L225 Difference]: With dead ends: 53 [2022-07-19 15:53:56,233 INFO L226 Difference]: Without dead ends: 48 [2022-07-19 15:53:56,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-07-19 15:53:56,234 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:53:56,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 139 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:53:56,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-19 15:53:56,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 32. [2022-07-19 15:53:56,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-19 15:53:56,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-07-19 15:53:56,246 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 25 [2022-07-19 15:53:56,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:53:56,246 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-07-19 15:53:56,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-19 15:53:56,247 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-07-19 15:53:56,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-19 15:53:56,249 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:53:56,249 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:53:56,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-19 15:53:56,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:56,472 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:53:56,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:53:56,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1145481658, now seen corresponding path program 1 times [2022-07-19 15:53:56,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:53:56,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394054790] [2022-07-19 15:53:56,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:56,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:53:56,483 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:53:56,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1355127206] [2022-07-19 15:53:56,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:56,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:56,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:56,485 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) [2022-07-19 15:53:56,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 15:53:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:53:56,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 15:53:56,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:53:56,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:53:56,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:53:56,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:53:56,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394054790] [2022-07-19 15:53:56,570 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:53:56,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355127206] [2022-07-19 15:53:56,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355127206] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:53:56,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:53:56,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 15:53:56,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050499958] [2022-07-19 15:53:56,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:53:56,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 15:53:56,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:53:56,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 15:53:56,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 15:53:56,573 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 15:53:56,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:53:56,600 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2022-07-19 15:53:56,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 15:53:56,601 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-07-19 15:53:56,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:53:56,602 INFO L225 Difference]: With dead ends: 61 [2022-07-19 15:53:56,602 INFO L226 Difference]: Without dead ends: 40 [2022-07-19 15:53:56,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 15:53:56,604 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:53:56,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 93 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:53:56,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-19 15:53:56,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-07-19 15:53:56,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 15:53:56,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2022-07-19 15:53:56,612 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 31 [2022-07-19 15:53:56,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:53:56,613 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2022-07-19 15:53:56,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 15:53:56,613 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2022-07-19 15:53:56,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-19 15:53:56,614 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:53:56,614 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:53:56,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 15:53:56,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:56,828 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:53:56,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:53:56,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1102972225, now seen corresponding path program 1 times [2022-07-19 15:53:56,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:53:56,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629644740] [2022-07-19 15:53:56,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:56,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:53:56,836 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:53:56,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [323431096] [2022-07-19 15:53:56,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:53:56,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:56,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:53:56,839 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) [2022-07-19 15:53:56,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 15:53:56,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 15:53:56,876 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 15:53:56,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 15:53:56,910 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 15:53:56,911 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 15:53:56,912 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-19 15:53:56,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 15:53:57,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:53:57,118 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 15:53:57,121 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-19 15:53:57,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 03:53:57 BoogieIcfgContainer [2022-07-19 15:53:57,151 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-19 15:53:57,151 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-19 15:53:57,152 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-19 15:53:57,152 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-19 15:53:57,152 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 03:53:47" (3/4) ... [2022-07-19 15:53:57,154 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-19 15:53:57,193 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-19 15:53:57,193 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-19 15:53:57,194 INFO L158 Benchmark]: Toolchain (without parser) took 10583.47ms. Allocated memory was 123.7MB in the beginning and 148.9MB in the end (delta: 25.2MB). Free memory was 91.3MB in the beginning and 84.6MB in the end (delta: 6.8MB). Peak memory consumption was 31.6MB. Max. memory is 16.1GB. [2022-07-19 15:53:57,194 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 83.9MB. Free memory is still 40.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 15:53:57,195 INFO L158 Benchmark]: CACSL2BoogieTranslator took 279.95ms. Allocated memory is still 123.7MB. Free memory was 91.0MB in the beginning and 97.6MB in the end (delta: -6.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-19 15:53:57,195 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.91ms. Allocated memory is still 123.7MB. Free memory was 97.6MB in the beginning and 96.1MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 15:53:57,195 INFO L158 Benchmark]: Boogie Preprocessor took 36.95ms. Allocated memory is still 123.7MB. Free memory was 96.1MB in the beginning and 95.1MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 15:53:57,196 INFO L158 Benchmark]: RCFGBuilder took 318.06ms. Allocated memory is still 123.7MB. Free memory was 94.8MB in the beginning and 84.0MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-19 15:53:57,196 INFO L158 Benchmark]: TraceAbstraction took 9854.48ms. Allocated memory was 123.7MB in the beginning and 148.9MB in the end (delta: 25.2MB). Free memory was 83.7MB in the beginning and 86.7MB in the end (delta: -3.0MB). Peak memory consumption was 24.2MB. Max. memory is 16.1GB. [2022-07-19 15:53:57,197 INFO L158 Benchmark]: Witness Printer took 42.19ms. Allocated memory is still 148.9MB. Free memory was 86.7MB in the beginning and 84.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 15:53:57,198 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 83.9MB. Free memory is still 40.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 279.95ms. Allocated memory is still 123.7MB. Free memory was 91.0MB in the beginning and 97.6MB in the end (delta: -6.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.91ms. Allocated memory is still 123.7MB. Free memory was 97.6MB in the beginning and 96.1MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 36.95ms. Allocated memory is still 123.7MB. Free memory was 96.1MB in the beginning and 95.1MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 318.06ms. Allocated memory is still 123.7MB. Free memory was 94.8MB in the beginning and 84.0MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 9854.48ms. Allocated memory was 123.7MB in the beginning and 148.9MB in the end (delta: 25.2MB). Free memory was 83.7MB in the beginning and 86.7MB in the end (delta: -3.0MB). Peak memory consumption was 24.2MB. Max. memory is 16.1GB. * Witness Printer took 42.19ms. Allocated memory is still 148.9MB. Free memory was 86.7MB in the beginning and 84.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(cond)=1, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L25] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [A=3, counter=0, R=0] [L27] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L27] RET assume_abort_if_not(A % 2 == 1) VAL [A=3, counter=0, R=0] [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A VAL [A=3, counter=0, r=-3, R=0, u=1, v=1] [L34] EXPR counter++ VAL [A=3, counter=1, counter++=0, r=-3, R=0, u=1, v=1] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=3, counter=1, R=0, r=-3, u=1, v=1] [L36] COND FALSE !(!(r != 0)) VAL [A=3, counter=1, R=0, r=-3, u=1, v=1] [L39] EXPR counter++ VAL [A=3, counter=2, counter++=1, R=0, r=-3, u=1, v=1] [L39] COND TRUE counter++<2 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=3, counter=2, R=0, r=-3, u=1, v=1] [L41] COND TRUE !(r > 0) VAL [A=3, counter=2, r=-3, R=0, u=1, v=1] [L47] EXPR counter++ VAL [A=3, counter=3, counter++=2, R=0, r=-3, u=1, v=1] [L47] COND FALSE !(counter++<2) [L34] EXPR counter++ VAL [A=3, counter=4, counter++=3, R=0, r=-3, u=1, v=1] [L34] COND FALSE !(counter++<2) [L56] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, counter=4] [L12] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=4] [L14] reach_error() VAL [\old(cond)=0, cond=0, counter=4] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9.8s, OverallIterations: 6, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 7.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 50 SdHoareTripleChecker+Valid, 6.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 45 mSDsluCounter, 464 SdHoareTripleChecker+Invalid, 6.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 300 mSDsCounter, 16 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 186 IncrementalHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 16 mSolverCounterUnsat, 164 mSDtfsCounter, 186 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 135 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=3, InterpolantAutomatonStates: 24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 17 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 149 NumberOfCodeBlocks, 149 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 131 ConstructedInterpolants, 0 QuantifiedInterpolants, 393 SizeOfPredicates, 10 NumberOfNonLiveVariables, 377 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 30/32 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-07-19 15:53:57,216 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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE