./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/bresenham-ll_valuebound2.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 72cd0a4215707a62376e213156123902caf611a87605e41064b672632b6ef1f9 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 12:28:51,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 12:28:51,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 12:28:51,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 12:28:51,838 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 12:28:51,839 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 12:28:51,841 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 12:28:51,844 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 12:28:51,845 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 12:28:51,847 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 12:28:51,849 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 12:28:51,849 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 12:28:51,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 12:28:51,852 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 12:28:51,853 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 12:28:51,854 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 12:28:51,856 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 12:28:51,859 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 12:28:51,860 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 12:28:51,863 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 12:28:51,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 12:28:51,866 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 12:28:51,867 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 12:28:51,867 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 12:28:51,869 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 12:28:51,871 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 12:28:51,871 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 12:28:51,872 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 12:28:51,873 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 12:28:51,873 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 12:28:51,874 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 12:28:51,874 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 12:28:51,875 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 12:28:51,876 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 12:28:51,876 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 12:28:51,877 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 12:28:51,878 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 12:28:51,878 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 12:28:51,878 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 12:28:51,879 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 12:28:51,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 12:28:51,880 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 12:28:51,897 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 12:28:51,897 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 12:28:51,898 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 12:28:51,898 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 12:28:51,898 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 12:28:51,898 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 12:28:51,899 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 12:28:51,899 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 12:28:51,899 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 12:28:51,899 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 12:28:51,900 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 12:28:51,900 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 12:28:51,900 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 12:28:51,900 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 12:28:51,900 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 12:28:51,901 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 12:28:51,901 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 12:28:51,901 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 12:28:51,901 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 12:28:51,901 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 12:28:51,901 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 12:28:51,901 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 12:28:51,901 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 12:28:51,902 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 12:28:51,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:28:51,902 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 12:28:51,902 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 12:28:51,902 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 12:28:51,902 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 12:28:51,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 12:28:51,903 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 12:28:51,903 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 12:28:51,903 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 12:28:51,903 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 12:28:51,903 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 72cd0a4215707a62376e213156123902caf611a87605e41064b672632b6ef1f9 [2021-12-21 12:28:52,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 12:28:52,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 12:28:52,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 12:28:52,129 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 12:28:52,129 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 12:28:52,130 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c [2021-12-21 12:28:52,182 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/908f80a67/9f975edb49364b07a408723b31875dd9/FLAG30a039c1f [2021-12-21 12:28:52,474 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 12:28:52,475 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c [2021-12-21 12:28:52,479 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/908f80a67/9f975edb49364b07a408723b31875dd9/FLAG30a039c1f [2021-12-21 12:28:52,904 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/908f80a67/9f975edb49364b07a408723b31875dd9 [2021-12-21 12:28:52,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 12:28:52,908 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 12:28:52,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 12:28:52,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 12:28:52,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 12:28:52,914 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:28:52" (1/1) ... [2021-12-21 12:28:52,915 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5479fd0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:28:52, skipping insertion in model container [2021-12-21 12:28:52,915 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:28:52" (1/1) ... [2021-12-21 12:28:52,920 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 12:28:52,930 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 12:28:53,041 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/bresenham-ll_valuebound2.c[597,610] [2021-12-21 12:28:53,062 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:28:53,070 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 12:28:53,083 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/bresenham-ll_valuebound2.c[597,610] [2021-12-21 12:28:53,108 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:28:53,117 INFO L208 MainTranslator]: Completed translation [2021-12-21 12:28:53,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:28:53 WrapperNode [2021-12-21 12:28:53,119 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 12:28:53,121 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 12:28:53,121 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 12:28:53,121 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 12:28:53,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:28:53" (1/1) ... [2021-12-21 12:28:53,134 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:28:53" (1/1) ... [2021-12-21 12:28:53,147 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51 [2021-12-21 12:28:53,148 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 12:28:53,148 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 12:28:53,148 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 12:28:53,149 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 12:28:53,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:28:53" (1/1) ... [2021-12-21 12:28:53,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:28:53" (1/1) ... [2021-12-21 12:28:53,159 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:28:53" (1/1) ... [2021-12-21 12:28:53,159 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:28:53" (1/1) ... [2021-12-21 12:28:53,161 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:28:53" (1/1) ... [2021-12-21 12:28:53,164 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:28:53" (1/1) ... [2021-12-21 12:28:53,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:28:53" (1/1) ... [2021-12-21 12:28:53,165 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 12:28:53,166 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 12:28:53,166 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 12:28:53,166 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 12:28:53,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:28:53" (1/1) ... [2021-12-21 12:28:53,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:28:53,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:28:53,207 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 12:28:53,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 12:28:53,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 12:28:53,243 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 12:28:53,243 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 12:28:53,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 12:28:53,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 12:28:53,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 12:28:53,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-21 12:28:53,243 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-21 12:28:53,284 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 12:28:53,286 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 12:28:53,408 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 12:28:53,411 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 12:28:53,412 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 12:28:53,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:28:53 BoogieIcfgContainer [2021-12-21 12:28:53,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 12:28:53,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 12:28:53,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 12:28:53,416 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 12:28:53,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 12:28:52" (1/3) ... [2021-12-21 12:28:53,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd74b2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:28:53, skipping insertion in model container [2021-12-21 12:28:53,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:28:53" (2/3) ... [2021-12-21 12:28:53,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd74b2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:28:53, skipping insertion in model container [2021-12-21 12:28:53,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:28:53" (3/3) ... [2021-12-21 12:28:53,419 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound2.c [2021-12-21 12:28:53,422 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 12:28:53,422 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 12:28:53,451 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 12:28:53,455 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 12:28:53,456 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 12:28:53,466 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 12:28:53,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-21 12:28:53,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:28:53,469 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:28:53,470 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:28:53,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:28:53,474 INFO L85 PathProgramCache]: Analyzing trace with hash 689891435, now seen corresponding path program 1 times [2021-12-21 12:28:53,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:28:53,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368075831] [2021-12-21 12:28:53,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:28:53,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:28:53,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:28:53,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 12:28:53,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:28:53,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:28:53,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:28:53,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 12:28:53,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:28:53,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368075831] [2021-12-21 12:28:53,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368075831] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:28:53,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:28:53,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 12:28:53,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202671541] [2021-12-21 12:28:53,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:28:53,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 12:28:53,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:28:53,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 12:28:53,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:28:53,610 INFO L87 Difference]: Start difference. First operand has 27 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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, (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) [2021-12-21 12:28:53,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:28:53,622 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2021-12-21 12:28:53,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 12:28:53,624 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, (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 19 [2021-12-21 12:28:53,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:28:53,628 INFO L225 Difference]: With dead ends: 51 [2021-12-21 12:28:53,638 INFO L226 Difference]: Without dead ends: 23 [2021-12-21 12:28:53,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:28:53,643 INFO L933 BasicCegarLoop]: 30 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, 30 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:28:53,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:28:53,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-21 12:28:53,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-21 12:28:53,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 12:28:53,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-12-21 12:28:53,688 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 19 [2021-12-21 12:28:53,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:28:53,689 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-12-21 12:28:53,689 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, (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) [2021-12-21 12:28:53,689 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-12-21 12:28:53,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-21 12:28:53,690 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:28:53,690 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:28:53,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 12:28:53,691 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:28:53,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:28:53,691 INFO L85 PathProgramCache]: Analyzing trace with hash 90086127, now seen corresponding path program 1 times [2021-12-21 12:28:53,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:28:53,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979341978] [2021-12-21 12:28:53,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:28:53,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:28:53,708 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 12:28:53,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [664677748] [2021-12-21 12:28:53,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:28:53,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:28:53,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:28:53,710 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:28:53,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 12:28:53,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:28:53,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 12:28:53,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:28:53,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 12:28:53,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:28:53,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:28:53,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979341978] [2021-12-21 12:28:53,926 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 12:28:53,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664677748] [2021-12-21 12:28:53,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664677748] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:28:53,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:28:53,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 12:28:53,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779114800] [2021-12-21 12:28:53,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:28:53,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 12:28:53,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:28:53,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 12:28:53,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 12:28:53,929 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 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) [2021-12-21 12:28:54,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:28:54,012 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-12-21 12:28:54,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 12:28:54,015 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 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 [2021-12-21 12:28:54,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:28:54,017 INFO L225 Difference]: With dead ends: 35 [2021-12-21 12:28:54,018 INFO L226 Difference]: Without dead ends: 31 [2021-12-21 12:28:54,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-21 12:28:54,020 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:28:54,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 81 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:28:54,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-21 12:28:54,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-12-21 12:28:54,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 12:28:54,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-12-21 12:28:54,034 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 19 [2021-12-21 12:28:54,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:28:54,035 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-12-21 12:28:54,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 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) [2021-12-21 12:28:54,035 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-12-21 12:28:54,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-21 12:28:54,036 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:28:54,036 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:28:54,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 12:28:54,251 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 [2021-12-21 12:28:54,252 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:28:54,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:28:54,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1522625704, now seen corresponding path program 1 times [2021-12-21 12:28:54,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:28:54,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233760144] [2021-12-21 12:28:54,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:28:54,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:28:54,264 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 12:28:54,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1066413036] [2021-12-21 12:28:54,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:28:54,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:28:54,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:28:54,266 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:28:54,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 12:28:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:28:54,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-21 12:28:54,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:28:54,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 12:28:54,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:28:54,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:28:54,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233760144] [2021-12-21 12:28:54,770 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 12:28:54,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066413036] [2021-12-21 12:28:54,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066413036] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:28:54,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:28:54,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-12-21 12:28:54,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041368818] [2021-12-21 12:28:54,771 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 12:28:54,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 12:28:54,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:28:54,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 12:28:54,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-12-21 12:28:54,773 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 12:28:54,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:28:54,890 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2021-12-21 12:28:54,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 12:28:54,891 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-12-21 12:28:54,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:28:54,892 INFO L225 Difference]: With dead ends: 57 [2021-12-21 12:28:54,893 INFO L226 Difference]: Without dead ends: 31 [2021-12-21 12:28:54,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-12-21 12:28:54,896 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 25 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:28:54,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 141 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:28:54,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-21 12:28:54,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-21 12:28:54,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 12:28:54,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-12-21 12:28:54,907 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 28 [2021-12-21 12:28:54,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:28:54,907 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-12-21 12:28:54,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 12:28:54,908 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-12-21 12:28:54,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-21 12:28:54,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:28:54,910 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:28:54,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 12:28:55,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-21 12:28:55,128 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:28:55,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:28:55,129 INFO L85 PathProgramCache]: Analyzing trace with hash 252381658, now seen corresponding path program 1 times [2021-12-21 12:28:55,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:28:55,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27106492] [2021-12-21 12:28:55,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:28:55,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:28:55,137 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 12:28:55,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621463508] [2021-12-21 12:28:55,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:28:55,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:28:55,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:28:55,139 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:28:55,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 12:28:55,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:28:55,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-21 12:28:55,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:28:55,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 12:28:55,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:28:55,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 12:28:55,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:28:55,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27106492] [2021-12-21 12:28:55,519 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 12:28:55,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621463508] [2021-12-21 12:28:55,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621463508] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:28:55,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 12:28:55,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-12-21 12:28:55,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33665846] [2021-12-21 12:28:55,521 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 12:28:55,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 12:28:55,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:28:55,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 12:28:55,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-12-21 12:28:55,523 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 14 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 12:28:55,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:28:55,806 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-12-21 12:28:55,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 12:28:55,806 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-12-21 12:28:55,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:28:55,807 INFO L225 Difference]: With dead ends: 44 [2021-12-21 12:28:55,807 INFO L226 Difference]: Without dead ends: 40 [2021-12-21 12:28:55,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-12-21 12:28:55,808 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 33 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 12:28:55,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 104 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 12:28:55,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-21 12:28:55,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2021-12-21 12:28:55,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 12:28:55,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-12-21 12:28:55,813 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2021-12-21 12:28:55,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:28:55,813 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-12-21 12:28:55,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 12:28:55,814 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-12-21 12:28:55,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-21 12:28:55,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:28:55,814 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:28:55,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 12:28:56,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:28:56,027 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:28:56,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:28:56,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1035193378, now seen corresponding path program 1 times [2021-12-21 12:28:56,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:28:56,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949094081] [2021-12-21 12:28:56,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:28:56,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:28:56,036 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 12:28:56,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102842067] [2021-12-21 12:28:56,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:28:56,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:28:56,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:28:56,038 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:28:56,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 12:28:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:28:56,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-21 12:28:56,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:28:56,289 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 12:28:56,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:28:56,580 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 12:28:56,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:28:56,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949094081] [2021-12-21 12:28:56,581 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 12:28:56,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102842067] [2021-12-21 12:28:56,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102842067] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:28:56,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 12:28:56,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-12-21 12:28:56,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332862196] [2021-12-21 12:28:56,582 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 12:28:56,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-21 12:28:56,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:28:56,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-21 12:28:56,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-12-21 12:28:56,583 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-21 12:28:57,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:28:57,020 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2021-12-21 12:28:57,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-21 12:28:57,020 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 35 [2021-12-21 12:28:57,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:28:57,021 INFO L225 Difference]: With dead ends: 52 [2021-12-21 12:28:57,021 INFO L226 Difference]: Without dead ends: 44 [2021-12-21 12:28:57,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=1052, Unknown=0, NotChecked=0, Total=1260 [2021-12-21 12:28:57,022 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 29 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:28:57,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 191 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 202 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2021-12-21 12:28:57,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-21 12:28:57,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-12-21 12:28:57,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-21 12:28:57,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2021-12-21 12:28:57,028 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 35 [2021-12-21 12:28:57,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:28:57,028 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2021-12-21 12:28:57,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-21 12:28:57,028 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2021-12-21 12:28:57,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 12:28:57,029 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:28:57,029 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:28:57,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 12:28:57,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:28:57,247 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:28:57,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:28:57,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1258851889, now seen corresponding path program 1 times [2021-12-21 12:28:57,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:28:57,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61791164] [2021-12-21 12:28:57,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:28:57,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:28:57,255 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 12:28:57,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465874376] [2021-12-21 12:28:57,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:28:57,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:28:57,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:28:57,261 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:28:57,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 12:28:57,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:28:57,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 12:28:57,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:28:57,448 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 12:28:57,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:28:57,613 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 12:28:57,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:28:57,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61791164] [2021-12-21 12:28:57,614 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 12:28:57,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465874376] [2021-12-21 12:28:57,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465874376] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:28:57,614 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 12:28:57,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-21 12:28:57,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271482465] [2021-12-21 12:28:57,615 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 12:28:57,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 12:28:57,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:28:57,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 12:28:57,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-21 12:28:57,616 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-21 12:28:57,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:28:57,720 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2021-12-21 12:28:57,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 12:28:57,721 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 44 [2021-12-21 12:28:57,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:28:57,723 INFO L225 Difference]: With dead ends: 55 [2021-12-21 12:28:57,723 INFO L226 Difference]: Without dead ends: 49 [2021-12-21 12:28:57,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-12-21 12:28:57,724 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 5 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:28:57,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 105 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:28:57,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-21 12:28:57,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2021-12-21 12:28:57,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 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) [2021-12-21 12:28:57,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-12-21 12:28:57,730 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 44 [2021-12-21 12:28:57,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:28:57,731 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-12-21 12:28:57,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-21 12:28:57,731 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-12-21 12:28:57,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-21 12:28:57,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:28:57,732 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:28:57,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 12:28:57,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:28:57,949 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:28:57,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:28:57,949 INFO L85 PathProgramCache]: Analyzing trace with hash 614391490, now seen corresponding path program 2 times [2021-12-21 12:28:57,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:28:57,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813703646] [2021-12-21 12:28:57,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:28:57,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:28:57,959 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 12:28:57,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [225472242] [2021-12-21 12:28:57,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 12:28:57,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:28:57,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:28:57,966 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:28:57,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 12:28:58,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 12:28:58,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:28:58,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 12:28:58,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:28:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 12:28:58,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:28:58,199 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-21 12:28:58,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:28:58,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813703646] [2021-12-21 12:28:58,200 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 12:28:58,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225472242] [2021-12-21 12:28:58,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225472242] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:28:58,200 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 12:28:58,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-12-21 12:28:58,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971034909] [2021-12-21 12:28:58,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 12:28:58,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 12:28:58,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:28:58,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 12:28:58,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 12:28:58,202 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-21 12:28:58,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:28:58,257 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2021-12-21 12:28:58,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 12:28:58,258 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 53 [2021-12-21 12:28:58,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:28:58,258 INFO L225 Difference]: With dead ends: 77 [2021-12-21 12:28:58,258 INFO L226 Difference]: Without dead ends: 58 [2021-12-21 12:28:58,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-21 12:28:58,259 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 5 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:28:58,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 110 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:28:58,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-21 12:28:58,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2021-12-21 12:28:58,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 states have internal predecessors, (47), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-21 12:28:58,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2021-12-21 12:28:58,269 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 53 [2021-12-21 12:28:58,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:28:58,269 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2021-12-21 12:28:58,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-21 12:28:58,269 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2021-12-21 12:28:58,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-21 12:28:58,270 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:28:58,270 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:28:58,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 12:28:58,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:28:58,470 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:28:58,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:28:58,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1191046844, now seen corresponding path program 3 times [2021-12-21 12:28:58,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:28:58,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301485285] [2021-12-21 12:28:58,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:28:58,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:28:58,478 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 12:28:58,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [659568579] [2021-12-21 12:28:58,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 12:28:58,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:28:58,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:28:58,480 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:28:58,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 12:28:58,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-21 12:28:58,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:28:58,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-21 12:28:58,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:29:06,428 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 12:29:06,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:29:31,871 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 12:29:31,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:29:31,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301485285] [2021-12-21 12:29:31,872 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 12:29:31,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659568579] [2021-12-21 12:29:31,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659568579] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:29:31,872 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 12:29:31,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 25 [2021-12-21 12:29:31,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068090404] [2021-12-21 12:29:31,872 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 12:29:31,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-21 12:29:31,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:29:31,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-21 12:29:31,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=499, Unknown=4, NotChecked=0, Total=600 [2021-12-21 12:29:31,873 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 25 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 22 states have internal predecessors, (43), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-21 12:29:37,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:29:37,878 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2021-12-21 12:29:37,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 12:29:37,879 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 22 states have internal predecessors, (43), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 53 [2021-12-21 12:29:37,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:29:37,879 INFO L225 Difference]: With dead ends: 57 [2021-12-21 12:29:37,879 INFO L226 Difference]: Without dead ends: 0 [2021-12-21 12:29:37,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=179, Invalid=873, Unknown=4, NotChecked=0, Total=1056 [2021-12-21 12:29:37,880 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:29:37,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 142 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 234 Invalid, 0 Unknown, 50 Unchecked, 2.1s Time] [2021-12-21 12:29:37,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-21 12:29:37,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-21 12:29:37,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:29:37,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-21 12:29:37,881 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 53 [2021-12-21 12:29:37,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:29:37,882 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-21 12:29:37,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 22 states have internal predecessors, (43), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-21 12:29:37,882 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-21 12:29:37,882 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-21 12:29:37,884 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-21 12:29:37,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 12:29:38,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:29:38,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-21 12:29:59,941 WARN L227 SmtUtils]: Spent 21.82s on a formula simplification. DAG size of input: 122 DAG size of output: 51 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-12-21 12:30:01,110 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-21 12:30:01,110 INFO L854 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~X~0#1| 2) (<= 0 |ULTIMATE.start_main_~X~0#1|)) [2021-12-21 12:30:01,110 INFO L858 garLoopResultBuilder]: For program point L27-1(line 27) no Hoare annotation was computed. [2021-12-21 12:30:01,110 INFO L861 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2021-12-21 12:30:01,110 INFO L858 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2021-12-21 12:30:01,110 INFO L861 garLoopResultBuilder]: At program point L52(lines 21 53) the Hoare annotation is: true [2021-12-21 12:30:01,110 INFO L854 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~Y~0#1|))) (or (and (= |ULTIMATE.start_main_~xy~0#1| 0) (= |ULTIMATE.start_main_~y~0#1| 0) (= .cse0 (+ |ULTIMATE.start_main_~X~0#1| |ULTIMATE.start_main_~v~0#1|)) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_~yx~0#1| 0)) (let ((.cse1 (* 2 |ULTIMATE.start_main_~y~0#1|)) (.cse2 (* (* |ULTIMATE.start_main_~Y~0#1| |ULTIMATE.start_main_~x~0#1|) 2))) (and (= (+ |ULTIMATE.start_main_~X~0#1| |ULTIMATE.start_main_~v~0#1| (* 2 |ULTIMATE.start_main_~xy~0#1|)) (+ .cse1 (* 2 |ULTIMATE.start_main_~yx~0#1|) .cse0)) (= (+ (* (* |ULTIMATE.start_main_~X~0#1| |ULTIMATE.start_main_~y~0#1|) 2) |ULTIMATE.start_main_~X~0#1| |ULTIMATE.start_main_~v~0#1|) (+ .cse2 .cse0)) (<= |ULTIMATE.start_main_~X~0#1| 2) (<= 0 |ULTIMATE.start_main_~Y~0#1|) (= (+ |ULTIMATE.start_main_~X~0#1| |ULTIMATE.start_main_~v~0#1| (* 2 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|))) (+ .cse1 .cse2 .cse0)) (<= |ULTIMATE.start_main_~Y~0#1| 2) (<= 0 |ULTIMATE.start_main_~X~0#1|))))) [2021-12-21 12:30:01,110 INFO L858 garLoopResultBuilder]: For program point L50-1(line 50) no Hoare annotation was computed. [2021-12-21 12:30:01,110 INFO L858 garLoopResultBuilder]: For program point L40(lines 40 45) no Hoare annotation was computed. [2021-12-21 12:30:01,110 INFO L858 garLoopResultBuilder]: For program point L40-2(lines 40 45) no Hoare annotation was computed. [2021-12-21 12:30:01,110 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-21 12:30:01,110 INFO L854 garLoopResultBuilder]: At program point L32-2(lines 32 47) the Hoare annotation is: (let ((.cse4 (* |ULTIMATE.start_main_~Y~0#1| |ULTIMATE.start_main_~x~0#1|))) (let ((.cse0 (* .cse4 2)) (.cse1 (* 2 |ULTIMATE.start_main_~Y~0#1|))) (and (= (+ (* (* |ULTIMATE.start_main_~X~0#1| |ULTIMATE.start_main_~y~0#1|) 2) |ULTIMATE.start_main_~X~0#1| |ULTIMATE.start_main_~v~0#1|) (+ .cse0 .cse1)) (<= |ULTIMATE.start_main_~X~0#1| 2) (<= 0 |ULTIMATE.start_main_~Y~0#1|) (or (<= |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~X~0#1|) (and (or (not (= |ULTIMATE.start_main_~X~0#1| 0)) (forall ((|ULTIMATE.start_main_~y~0#1| Int)) (= (+ |ULTIMATE.start_main_~X~0#1| |ULTIMATE.start_main_~v~0#1| (* 2 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|))) (+ (* 2 |ULTIMATE.start_main_~y~0#1|) (* (* |ULTIMATE.start_main_~Y~0#1| |ULTIMATE.start_main_~x~0#1|) 2) (* 2 |ULTIMATE.start_main_~Y~0#1|))))) (let ((.cse3 (+ .cse4 |ULTIMATE.start_main_~Y~0#1| (div (+ (* (- 1) |ULTIMATE.start_main_~v~0#1|) (* (- 1) |ULTIMATE.start_main_~X~0#1|)) 2)))) (or (let ((.cse2 (div .cse3 |ULTIMATE.start_main_~X~0#1|))) (= (+ |ULTIMATE.start_main_~X~0#1| |ULTIMATE.start_main_~v~0#1| (* 2 (* .cse2 |ULTIMATE.start_main_~x~0#1|))) (+ .cse0 (* .cse2 2) .cse1))) (not (= (mod .cse3 |ULTIMATE.start_main_~X~0#1|) 0)))))) (<= |ULTIMATE.start_main_~Y~0#1| 2) (<= 0 |ULTIMATE.start_main_~X~0#1|)))) [2021-12-21 12:30:01,111 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-21 12:30:01,111 INFO L858 garLoopResultBuilder]: For program point L32-3(lines 32 47) no Hoare annotation was computed. [2021-12-21 12:30:01,111 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-21 12:30:01,111 INFO L854 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~Y~0#1|))) (and (= (+ (* (* |ULTIMATE.start_main_~X~0#1| |ULTIMATE.start_main_~y~0#1|) 2) |ULTIMATE.start_main_~X~0#1| |ULTIMATE.start_main_~v~0#1|) (+ (* (* |ULTIMATE.start_main_~Y~0#1| |ULTIMATE.start_main_~x~0#1|) 2) .cse0)) (<= |ULTIMATE.start_main_~X~0#1| 2) (= (+ |ULTIMATE.start_main_~X~0#1| |ULTIMATE.start_main_~v~0#1| (* 2 |ULTIMATE.start_main_~xy~0#1|)) (+ (* 2 |ULTIMATE.start_main_~yx~0#1|) .cse0)) (<= 0 |ULTIMATE.start_main_~Y~0#1|) (<= |ULTIMATE.start_main_~Y~0#1| 2) (<= 0 |ULTIMATE.start_main_~X~0#1|) (or (<= |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~X~0#1|) (forall ((|ULTIMATE.start_main_~Y~0#1| Int)) (= (+ (* 2 |ULTIMATE.start_main_~y~0#1|) (* (* |ULTIMATE.start_main_~X~0#1| |ULTIMATE.start_main_~y~0#1|) 2)) (* 2 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|))))))) [2021-12-21 12:30:01,111 INFO L858 garLoopResultBuilder]: For program point L35-1(lines 32 47) no Hoare annotation was computed. [2021-12-21 12:30:01,111 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 10 12) the Hoare annotation is: true [2021-12-21 12:30:01,111 INFO L858 garLoopResultBuilder]: For program point L11(line 11) no Hoare annotation was computed. [2021-12-21 12:30:01,111 INFO L858 garLoopResultBuilder]: For program point L11-2(lines 10 12) no Hoare annotation was computed. [2021-12-21 12:30:01,111 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 10 12) no Hoare annotation was computed. [2021-12-21 12:30:01,111 INFO L858 garLoopResultBuilder]: For program point L15(lines 15 16) no Hoare annotation was computed. [2021-12-21 12:30:01,111 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 13 19) the Hoare annotation is: true [2021-12-21 12:30:01,111 INFO L858 garLoopResultBuilder]: For program point L14(lines 14 17) no Hoare annotation was computed. [2021-12-21 12:30:01,111 INFO L858 garLoopResultBuilder]: For program point L14-2(lines 13 19) no Hoare annotation was computed. [2021-12-21 12:30:01,111 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 13 19) no Hoare annotation was computed. [2021-12-21 12:30:01,111 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2021-12-21 12:30:01,113 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2021-12-21 12:30:01,114 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-21 12:30:01,119 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~y~0#1,QUANTIFIED] [2021-12-21 12:30:01,119 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~y~0#1,QUANTIFIED] [2021-12-21 12:30:01,124 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~y~0#1,QUANTIFIED] [2021-12-21 12:30:01,124 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~y~0#1,QUANTIFIED] [2021-12-21 12:30:01,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 12:30:01 BoogieIcfgContainer [2021-12-21 12:30:01,125 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-21 12:30:01,126 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-21 12:30:01,126 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-21 12:30:01,126 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-21 12:30:01,126 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:28:53" (3/4) ... [2021-12-21 12:30:01,128 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-21 12:30:01,132 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2021-12-21 12:30:01,132 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-12-21 12:30:01,134 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-12-21 12:30:01,135 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-21 12:30:01,135 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-21 12:30:01,135 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-21 12:30:01,154 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-21 12:30:01,154 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-21 12:30:01,155 INFO L158 Benchmark]: Toolchain (without parser) took 68246.59ms. Allocated memory was 132.1MB in the beginning and 159.4MB in the end (delta: 27.3MB). Free memory was 99.5MB in the beginning and 107.8MB in the end (delta: -8.3MB). Peak memory consumption was 17.2MB. Max. memory is 16.1GB. [2021-12-21 12:30:01,155 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 75.5MB. Free memory is still 35.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 12:30:01,155 INFO L158 Benchmark]: CACSL2BoogieTranslator took 208.03ms. Allocated memory is still 132.1MB. Free memory was 99.2MB in the beginning and 107.5MB in the end (delta: -8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 12:30:01,159 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.12ms. Allocated memory is still 132.1MB. Free memory was 107.5MB in the beginning and 105.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 12:30:01,160 INFO L158 Benchmark]: Boogie Preprocessor took 17.17ms. Allocated memory is still 132.1MB. Free memory was 105.5MB in the beginning and 105.0MB in the end (delta: 581.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 12:30:01,160 INFO L158 Benchmark]: RCFGBuilder took 247.16ms. Allocated memory is still 132.1MB. Free memory was 105.0MB in the beginning and 94.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-21 12:30:01,160 INFO L158 Benchmark]: TraceAbstraction took 67711.25ms. Allocated memory was 132.1MB in the beginning and 159.4MB in the end (delta: 27.3MB). Free memory was 93.7MB in the beginning and 110.9MB in the end (delta: -17.2MB). Peak memory consumption was 77.3MB. Max. memory is 16.1GB. [2021-12-21 12:30:01,161 INFO L158 Benchmark]: Witness Printer took 28.52ms. Allocated memory is still 159.4MB. Free memory was 110.9MB in the beginning and 107.8MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 12:30:01,162 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 75.5MB. Free memory is still 35.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 208.03ms. Allocated memory is still 132.1MB. Free memory was 99.2MB in the beginning and 107.5MB in the end (delta: -8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.12ms. Allocated memory is still 132.1MB. Free memory was 107.5MB in the beginning and 105.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.17ms. Allocated memory is still 132.1MB. Free memory was 105.5MB in the beginning and 105.0MB in the end (delta: 581.5kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 247.16ms. Allocated memory is still 132.1MB. Free memory was 105.0MB in the beginning and 94.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 67711.25ms. Allocated memory was 132.1MB in the beginning and 159.4MB in the end (delta: 27.3MB). Free memory was 93.7MB in the beginning and 110.9MB in the end (delta: -17.2MB). Peak memory consumption was 77.3MB. Max. memory is 16.1GB. * Witness Printer took 28.52ms. Allocated memory is still 159.4MB. Free memory was 110.9MB in the beginning and 107.8MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~y~0#1,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~y~0#1,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~y~0#1,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~y~0#1,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 67.7s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 7.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 23.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 131 SdHoareTripleChecker+Valid, 2.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 127 mSDsluCounter, 904 SdHoareTripleChecker+Invalid, 2.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 124 IncrementalHoareTripleChecker+Unchecked, 734 mSDsCounter, 84 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 885 IncrementalHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 84 mSolverCounterUnsat, 170 mSDtfsCounter, 885 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 516 GetRequests, 388 SyntacticMatches, 6 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 25.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=7, InterpolantAutomatonStates: 94, 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, 8 MinimizatonAttempts, 24 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 30 PreInvPairs, 54 NumberOfFragments, 300 HoareAnnotationTreeSize, 30 FomulaSimplifications, 210 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 4049 FormulaSimplificationTreeSizeReductionInter, 23.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 35.4s InterpolantComputationTime, 279 NumberOfCodeBlocks, 261 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 479 ConstructedInterpolants, 6 QuantifiedInterpolants, 3112 SizeOfPredicates, 38 NumberOfNonLiveVariables, 711 ConjunctsInSsa, 131 ConjunctsInUnsatCore, 13 InterpolantComputations, 2 PerfectInterpolantSequences, 309/368 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 32]: Loop Invariant [2021-12-21 12:30:01,175 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~y~0#1,QUANTIFIED] [2021-12-21 12:30:01,175 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~y~0#1,QUANTIFIED] [2021-12-21 12:30:01,176 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~y~0#1,QUANTIFIED] [2021-12-21 12:30:01,176 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~y~0#1,QUANTIFIED] Derived loop invariant: ((((X * y * 2 + X + v == Y * x * 2 + 2 * Y && X <= 2) && 0 <= Y) && (x <= X || ((!(X == 0) || (forall ULTIMATE.start_main_~y~0#1 : int :: X + v + 2 * (x * ULTIMATE.start_main_~y~0#1) == 2 * ULTIMATE.start_main_~y~0#1 + Y * x * 2 + 2 * Y)) && (X + v + 2 * ((Y * x + Y + (-1 * v + -1 * X) / 2) / X * x) == Y * x * 2 + (Y * x + Y + (-1 * v + -1 * X) / 2) / X * 2 + 2 * Y || !((Y * x + Y + (-1 * v + -1 * X) / 2) % X == 0))))) && Y <= 2) && 0 <= X - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-12-21 12:30:01,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE