./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/geo3-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/geo3-ll_unwindbound10.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 2bd6e67b7fa2ee5ce263daa222a7fee92baa3ec009b3953f796d40da324e5524 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 12:30:38,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 12:30:38,782 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 12:30:38,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 12:30:38,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 12:30:38,847 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 12:30:38,848 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 12:30:38,851 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 12:30:38,853 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 12:30:38,857 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 12:30:38,858 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 12:30:38,859 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 12:30:38,860 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 12:30:38,862 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 12:30:38,863 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 12:30:38,867 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 12:30:38,868 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 12:30:38,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 12:30:38,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 12:30:38,880 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 12:30:38,881 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 12:30:38,882 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 12:30:38,883 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 12:30:38,884 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 12:30:38,890 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 12:30:38,891 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 12:30:38,891 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 12:30:38,892 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 12:30:38,893 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 12:30:38,893 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 12:30:38,894 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 12:30:38,895 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 12:30:38,896 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 12:30:38,897 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 12:30:38,898 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 12:30:38,898 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 12:30:38,899 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 12:30:38,899 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 12:30:38,899 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 12:30:38,900 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 12:30:38,900 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 12:30:38,901 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 12:30:38,929 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 12:30:38,929 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 12:30:38,930 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 12:30:38,930 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 12:30:38,931 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 12:30:38,931 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 12:30:38,932 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 12:30:38,932 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 12:30:38,932 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 12:30:38,932 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 12:30:38,933 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 12:30:38,933 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 12:30:38,934 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 12:30:38,934 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 12:30:38,934 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 12:30:38,934 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 12:30:38,934 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 12:30:38,935 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 12:30:38,935 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 12:30:38,935 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 12:30:38,935 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 12:30:38,935 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 12:30:38,936 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 12:30:38,936 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 12:30:38,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 12:30:38,936 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 12:30:38,936 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 12:30:38,937 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 12:30:38,937 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 12:30:38,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 12:30:38,937 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 12:30:38,937 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 12:30:38,938 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 12:30:38,938 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 12:30:38,938 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2bd6e67b7fa2ee5ce263daa222a7fee92baa3ec009b3953f796d40da324e5524 [2021-12-17 12:30:39,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 12:30:39,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 12:30:39,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 12:30:39,206 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 12:30:39,207 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 12:30:39,209 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/geo3-ll_unwindbound10.c [2021-12-17 12:30:39,275 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a81fbd37/f2db43f9f59246ec9cc67996d42221dc/FLAG9a74330ba [2021-12-17 12:30:39,701 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 12:30:39,702 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/geo3-ll_unwindbound10.c [2021-12-17 12:30:39,708 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a81fbd37/f2db43f9f59246ec9cc67996d42221dc/FLAG9a74330ba [2021-12-17 12:30:39,736 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a81fbd37/f2db43f9f59246ec9cc67996d42221dc [2021-12-17 12:30:39,738 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 12:30:39,740 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 12:30:39,744 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 12:30:39,744 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 12:30:39,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 12:30:39,747 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:30:39" (1/1) ... [2021-12-17 12:30:39,748 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c352b9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:30:39, skipping insertion in model container [2021-12-17 12:30:39,748 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:30:39" (1/1) ... [2021-12-17 12:30:39,754 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 12:30:39,768 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 12:30:39,900 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/geo3-ll_unwindbound10.c[525,538] [2021-12-17 12:30:39,915 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 12:30:39,922 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 12:30:39,933 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/geo3-ll_unwindbound10.c[525,538] [2021-12-17 12:30:39,942 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 12:30:39,953 INFO L208 MainTranslator]: Completed translation [2021-12-17 12:30:39,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:30:39 WrapperNode [2021-12-17 12:30:39,954 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 12:30:39,954 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 12:30:39,955 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 12:30:39,955 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 12:30:39,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:30:39" (1/1) ... [2021-12-17 12:30:39,968 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:30:39" (1/1) ... [2021-12-17 12:30:39,982 INFO L137 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 48 [2021-12-17 12:30:39,983 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 12:30:39,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 12:30:39,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 12:30:39,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 12:30:39,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:30:39" (1/1) ... [2021-12-17 12:30:39,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:30:39" (1/1) ... [2021-12-17 12:30:39,991 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:30:39" (1/1) ... [2021-12-17 12:30:39,991 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:30:39" (1/1) ... [2021-12-17 12:30:39,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:30:39" (1/1) ... [2021-12-17 12:30:39,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:30:39" (1/1) ... [2021-12-17 12:30:39,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:30:39" (1/1) ... [2021-12-17 12:30:39,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 12:30:39,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 12:30:39,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 12:30:39,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 12:30:40,000 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:30:39" (1/1) ... [2021-12-17 12:30:40,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 12:30:40,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:30:40,036 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) [2021-12-17 12:30:40,042 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 [2021-12-17 12:30:40,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 12:30:40,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 12:30:40,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 12:30:40,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 12:30:40,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 12:30:40,069 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 12:30:40,125 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 12:30:40,126 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 12:30:40,276 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 12:30:40,281 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 12:30:40,281 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 12:30:40,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:30:40 BoogieIcfgContainer [2021-12-17 12:30:40,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 12:30:40,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 12:30:40,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 12:30:40,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 12:30:40,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 12:30:39" (1/3) ... [2021-12-17 12:30:40,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62b7c614 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:30:40, skipping insertion in model container [2021-12-17 12:30:40,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:30:39" (2/3) ... [2021-12-17 12:30:40,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62b7c614 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:30:40, skipping insertion in model container [2021-12-17 12:30:40,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:30:40" (3/3) ... [2021-12-17 12:30:40,297 INFO L111 eAbstractionObserver]: Analyzing ICFG geo3-ll_unwindbound10.c [2021-12-17 12:30:40,302 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 12:30:40,302 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 12:30:40,353 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 12:30:40,366 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 [2021-12-17 12:30:40,366 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 12:30:40,388 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 12:30:40,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-17 12:30:40,392 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:30:40,393 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:30:40,394 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:30:40,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:30:40,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1819757606, now seen corresponding path program 1 times [2021-12-17 12:30:40,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:30:40,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130950780] [2021-12-17 12:30:40,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:30:40,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:30:40,487 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:30:40,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1791766424] [2021-12-17 12:30:40,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:30:40,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:30:40,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:30:40,491 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) [2021-12-17 12:30:40,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 12:30:40,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:30:40,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-17 12:30:40,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:30:40,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 12:30:40,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 12:30:40,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:30:40,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130950780] [2021-12-17 12:30:40,646 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:30:40,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791766424] [2021-12-17 12:30:40,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791766424] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 12:30:40,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 12:30:40,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 12:30:40,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595306318] [2021-12-17 12:30:40,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 12:30:40,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 12:30:40,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:30:40,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 12:30:40,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 12:30:40,688 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 12:30:40,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:30:40,704 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2021-12-17 12:30:40,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 12:30:40,706 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-17 12:30:40,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:30:40,712 INFO L225 Difference]: With dead ends: 32 [2021-12-17 12:30:40,712 INFO L226 Difference]: Without dead ends: 13 [2021-12-17 12:30:40,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 12:30:40,720 INFO L933 BasicCegarLoop]: 19 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, 19 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 [2021-12-17 12:30:40,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 12:30:40,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-12-17 12:30:40,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-12-17 12:30:40,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 12:30:40,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-12-17 12:30:40,760 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2021-12-17 12:30:40,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:30:40,761 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-12-17 12:30:40,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 12:30:40,762 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-12-17 12:30:40,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-17 12:30:40,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:30:40,763 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:30:40,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 12:30:40,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-17 12:30:40,989 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:30:40,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:30:40,989 INFO L85 PathProgramCache]: Analyzing trace with hash 178410715, now seen corresponding path program 1 times [2021-12-17 12:30:40,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:30:40,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630027579] [2021-12-17 12:30:40,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:30:40,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:30:41,006 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:30:41,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1088242107] [2021-12-17 12:30:41,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:30:41,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:30:41,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:30:41,010 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) [2021-12-17 12:30:41,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 12:30:41,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:30:41,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 12:30:41,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:30:41,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 12:30:41,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 12:30:41,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:30:41,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630027579] [2021-12-17 12:30:41,131 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:30:41,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088242107] [2021-12-17 12:30:41,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088242107] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 12:30:41,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 12:30:41,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 12:30:41,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642254914] [2021-12-17 12:30:41,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 12:30:41,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 12:30:41,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:30:41,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 12:30:41,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 12:30:41,139 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 12:30:41,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:30:41,158 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-12-17 12:30:41,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 12:30:41,159 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-17 12:30:41,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:30:41,164 INFO L225 Difference]: With dead ends: 22 [2021-12-17 12:30:41,165 INFO L226 Difference]: Without dead ends: 15 [2021-12-17 12:30:41,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 12:30:41,167 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 12:30:41,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 12:30:41,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-17 12:30:41,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-12-17 12:30:41,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 12:30:41,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-12-17 12:30:41,175 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 8 [2021-12-17 12:30:41,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:30:41,175 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-12-17 12:30:41,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 12:30:41,176 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-12-17 12:30:41,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-17 12:30:41,176 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:30:41,177 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:30:41,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 12:30:41,396 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,SelfDestructingSolverStorable1 [2021-12-17 12:30:41,397 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:30:41,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:30:41,397 INFO L85 PathProgramCache]: Analyzing trace with hash 180198175, now seen corresponding path program 1 times [2021-12-17 12:30:41,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:30:41,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159213262] [2021-12-17 12:30:41,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:30:41,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:30:41,408 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:30:41,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395363224] [2021-12-17 12:30:41,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:30:41,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:30:41,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:30:41,411 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) [2021-12-17 12:30:41,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 12:30:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:30:41,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 12:30:41,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:30:41,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 12:30:41,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 12:30:41,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:30:41,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159213262] [2021-12-17 12:30:41,602 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:30:41,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395363224] [2021-12-17 12:30:41,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395363224] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 12:30:41,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 12:30:41,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 12:30:41,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113322668] [2021-12-17 12:30:41,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 12:30:41,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 12:30:41,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:30:41,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 12:30:41,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 12:30:41,607 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 12:30:41,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:30:41,650 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-12-17 12:30:41,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 12:30:41,651 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-17 12:30:41,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:30:41,652 INFO L225 Difference]: With dead ends: 24 [2021-12-17 12:30:41,652 INFO L226 Difference]: Without dead ends: 21 [2021-12-17 12:30:41,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 12:30:41,655 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 12:30:41,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 45 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 12:30:41,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-17 12:30:41,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-17 12:30:41,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 12:30:41,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-12-17 12:30:41,667 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 8 [2021-12-17 12:30:41,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:30:41,667 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-12-17 12:30:41,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 12:30:41,668 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-12-17 12:30:41,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-17 12:30:41,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:30:41,669 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:30:41,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 12:30:41,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:30:41,876 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:30:41,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:30:41,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1542398814, now seen corresponding path program 1 times [2021-12-17 12:30:41,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:30:41,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053565985] [2021-12-17 12:30:41,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:30:41,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:30:41,885 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:30:41,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1523244010] [2021-12-17 12:30:41,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:30:41,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:30:41,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:30:41,890 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) [2021-12-17 12:30:41,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 12:30:41,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:30:41,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 12:30:41,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:30:41,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 12:30:41,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:30:42,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 12:30:42,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:30:42,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053565985] [2021-12-17 12:30:42,036 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:30:42,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523244010] [2021-12-17 12:30:42,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523244010] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 12:30:42,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 12:30:42,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-12-17 12:30:42,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052383335] [2021-12-17 12:30:42,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 12:30:42,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 12:30:42,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:30:42,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 12:30:42,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-17 12:30:42,038 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 12:30:42,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:30:42,104 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2021-12-17 12:30:42,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 12:30:42,105 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2021-12-17 12:30:42,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:30:42,106 INFO L225 Difference]: With dead ends: 52 [2021-12-17 12:30:42,106 INFO L226 Difference]: Without dead ends: 45 [2021-12-17 12:30:42,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 12:30:42,121 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 12:30:42,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 66 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 12:30:42,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-17 12:30:42,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2021-12-17 12:30:42,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 32 states have internal predecessors, (36), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 12:30:42,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-12-17 12:30:42,128 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 16 [2021-12-17 12:30:42,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:30:42,128 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-12-17 12:30:42,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 12:30:42,129 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-12-17 12:30:42,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-17 12:30:42,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:30:42,130 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:30:42,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 12:30:42,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:30:42,330 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:30:42,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:30:42,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1540611354, now seen corresponding path program 1 times [2021-12-17 12:30:42,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:30:42,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73948195] [2021-12-17 12:30:42,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:30:42,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:30:42,338 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:30:42,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [632098334] [2021-12-17 12:30:42,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:30:42,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:30:42,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:30:42,340 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) [2021-12-17 12:30:42,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 12:30:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:30:42,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-17 12:30:42,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:30:42,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 12:30:42,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:30:42,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 12:30:42,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:30:42,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73948195] [2021-12-17 12:30:42,825 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:30:42,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632098334] [2021-12-17 12:30:42,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632098334] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 12:30:42,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 12:30:42,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-12-17 12:30:42,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270745515] [2021-12-17 12:30:42,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 12:30:42,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 12:30:42,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:30:42,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 12:30:42,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-17 12:30:42,828 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 12:30:43,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:30:43,054 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-12-17 12:30:43,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 12:30:43,055 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2021-12-17 12:30:43,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:30:43,055 INFO L225 Difference]: With dead ends: 41 [2021-12-17 12:30:43,056 INFO L226 Difference]: Without dead ends: 0 [2021-12-17 12:30:43,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-12-17 12:30:43,057 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 12:30:43,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 83 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 12:30:43,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-17 12:30:43,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-17 12:30:43,058 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) [2021-12-17 12:30:43,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-17 12:30:43,058 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2021-12-17 12:30:43,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:30:43,058 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-17 12:30:43,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 12:30:43,058 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-17 12:30:43,058 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-17 12:30:43,061 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 12:30:43,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-17 12:30:43,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:30:43,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-17 12:30:43,435 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-17 12:30:43,435 INFO L858 garLoopResultBuilder]: For program point L44(line 44) no Hoare annotation was computed. [2021-12-17 12:30:43,435 INFO L858 garLoopResultBuilder]: For program point L34-1(lines 34 43) no Hoare annotation was computed. [2021-12-17 12:30:43,435 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-17 12:30:43,436 INFO L854 garLoopResultBuilder]: At program point L34-3(lines 34 43) the Hoare annotation is: (= (+ |ULTIMATE.start_main_~x~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~az~0#1|)) (+ |ULTIMATE.start_main_~a~0#1| (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|))) [2021-12-17 12:30:43,436 INFO L854 garLoopResultBuilder]: At program point L34-4(lines 34 43) the Hoare annotation is: (= (+ |ULTIMATE.start_main_~x~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~az~0#1|)) (+ |ULTIMATE.start_main_~a~0#1| (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|))) [2021-12-17 12:30:43,436 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-17 12:30:43,436 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-17 12:30:43,436 INFO L861 garLoopResultBuilder]: At program point L45(lines 22 46) the Hoare annotation is: true [2021-12-17 12:30:43,436 INFO L854 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (= (+ |ULTIMATE.start_main_~x~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~az~0#1|)) (+ |ULTIMATE.start_main_~a~0#1| (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|))) [2021-12-17 12:30:43,436 INFO L858 garLoopResultBuilder]: For program point L35-1(lines 34 43) no Hoare annotation was computed. [2021-12-17 12:30:43,436 INFO L858 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-12-17 12:30:43,436 INFO L858 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-12-17 12:30:43,436 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-12-17 12:30:43,436 INFO L858 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-12-17 12:30:43,437 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-12-17 12:30:43,437 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-12-17 12:30:43,439 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2021-12-17 12:30:43,441 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 12:30:43,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 12:30:43 BoogieIcfgContainer [2021-12-17 12:30:43,452 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 12:30:43,453 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 12:30:43,453 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 12:30:43,453 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 12:30:43,454 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:30:40" (3/4) ... [2021-12-17 12:30:43,457 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-17 12:30:43,462 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-12-17 12:30:43,465 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-12-17 12:30:43,466 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-17 12:30:43,466 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-17 12:30:43,466 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-17 12:30:43,491 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-17 12:30:43,492 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 12:30:43,492 INFO L158 Benchmark]: Toolchain (without parser) took 3752.28ms. Allocated memory is still 102.8MB. Free memory was 72.8MB in the beginning and 51.0MB in the end (delta: 21.9MB). Peak memory consumption was 23.3MB. Max. memory is 16.1GB. [2021-12-17 12:30:43,493 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 81.8MB. Free memory was 53.5MB in the beginning and 53.5MB in the end (delta: 26.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 12:30:43,493 INFO L158 Benchmark]: CACSL2BoogieTranslator took 210.26ms. Allocated memory is still 102.8MB. Free memory was 72.3MB in the beginning and 80.3MB in the end (delta: -8.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 12:30:43,493 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.53ms. Allocated memory is still 102.8MB. Free memory was 79.8MB in the beginning and 78.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 12:30:43,494 INFO L158 Benchmark]: Boogie Preprocessor took 14.81ms. Allocated memory is still 102.8MB. Free memory was 78.6MB in the beginning and 77.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 12:30:43,494 INFO L158 Benchmark]: RCFGBuilder took 283.35ms. Allocated memory is still 102.8MB. Free memory was 77.6MB in the beginning and 68.2MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-17 12:30:43,494 INFO L158 Benchmark]: TraceAbstraction took 3168.80ms. Allocated memory is still 102.8MB. Free memory was 67.7MB in the beginning and 53.8MB in the end (delta: 13.9MB). Peak memory consumption was 15.5MB. Max. memory is 16.1GB. [2021-12-17 12:30:43,495 INFO L158 Benchmark]: Witness Printer took 38.76ms. Allocated memory is still 102.8MB. Free memory was 53.8MB in the beginning and 51.0MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-17 12:30:43,496 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 81.8MB. Free memory was 53.5MB in the beginning and 53.5MB in the end (delta: 26.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 210.26ms. Allocated memory is still 102.8MB. Free memory was 72.3MB in the beginning and 80.3MB in the end (delta: -8.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.53ms. Allocated memory is still 102.8MB. Free memory was 79.8MB in the beginning and 78.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 14.81ms. Allocated memory is still 102.8MB. Free memory was 78.6MB in the beginning and 77.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 283.35ms. Allocated memory is still 102.8MB. Free memory was 77.6MB in the beginning and 68.2MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 3168.80ms. Allocated memory is still 102.8MB. Free memory was 67.7MB in the beginning and 53.8MB in the end (delta: 13.9MB). Peak memory consumption was 15.5MB. Max. memory is 16.1GB. * Witness Printer took 38.76ms. Allocated memory is still 102.8MB. Free memory was 53.8MB in the beginning and 51.0MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.1s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 57 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 54 mSDsluCounter, 248 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 176 mSDsCounter, 21 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 103 IncrementalHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 21 mSolverCounterUnsat, 72 mSDtfsCounter, 103 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=4, InterpolantAutomatonStates: 28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 16 PreInvPairs, 30 NumberOfFragments, 35 HoareAnnotationTreeSize, 16 FomulaSimplifications, 60 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 150 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 55 NumberOfCodeBlocks, 55 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 80 ConstructedInterpolants, 0 QuantifiedInterpolants, 323 SizeOfPredicates, 4 NumberOfNonLiveVariables, 313 ConjunctsInSsa, 36 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 9/18 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: 22]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: x + y * az == a + x * z RESULT: Ultimate proved your program to be correct! [2021-12-17 12:30:43,512 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