./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0219.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e19ca921 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/test-0219.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4a489d3e73f8fa53a32414f65b592ba5db703c103e5e16e188592c7c2dfeab95 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 16:30:44,917 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 16:30:44,921 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 16:30:44,954 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 16:30:44,957 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 16:30:44,959 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 16:30:44,961 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 16:30:44,962 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 16:30:44,963 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 16:30:44,963 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 16:30:44,964 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 16:30:44,967 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 16:30:44,967 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 16:30:44,968 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 16:30:44,969 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 16:30:44,970 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 16:30:44,972 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 16:30:44,977 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 16:30:44,978 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 16:30:44,981 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 16:30:44,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 16:30:44,989 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 16:30:44,990 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 16:30:44,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 16:30:44,998 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 16:30:44,999 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 16:30:45,000 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 16:30:45,001 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 16:30:45,002 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 16:30:45,003 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 16:30:45,003 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 16:30:45,004 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 16:30:45,005 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 16:30:45,006 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 16:30:45,007 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 16:30:45,007 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 16:30:45,008 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 16:30:45,008 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 16:30:45,009 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 16:30:45,009 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 16:30:45,010 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 16:30:45,011 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-22 16:30:45,042 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 16:30:45,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 16:30:45,043 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 16:30:45,044 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 16:30:45,044 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 16:30:45,045 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 16:30:45,046 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 16:30:45,046 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 16:30:45,046 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 16:30:45,046 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 16:30:45,047 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 16:30:45,047 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 16:30:45,048 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 16:30:45,048 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 16:30:45,048 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 16:30:45,048 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 16:30:45,048 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 16:30:45,049 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 16:30:45,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 16:30:45,049 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 16:30:45,049 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 16:30:45,049 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 16:30:45,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 16:30:45,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 16:30:45,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 16:30:45,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:30:45,050 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 16:30:45,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 16:30:45,051 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 16:30:45,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 16:30:45,052 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 16:30:45,052 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a489d3e73f8fa53a32414f65b592ba5db703c103e5e16e188592c7c2dfeab95 [2021-12-22 16:30:45,258 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 16:30:45,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 16:30:45,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 16:30:45,290 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 16:30:45,292 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 16:30:45,294 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0219.i [2021-12-22 16:30:45,344 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aeeb0f25e/2e50cbd644c74e6bb350d997ee60d001/FLAGf8fdeae78 [2021-12-22 16:30:45,777 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 16:30:45,777 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0219.i [2021-12-22 16:30:45,792 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aeeb0f25e/2e50cbd644c74e6bb350d997ee60d001/FLAGf8fdeae78 [2021-12-22 16:30:46,145 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aeeb0f25e/2e50cbd644c74e6bb350d997ee60d001 [2021-12-22 16:30:46,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 16:30:46,151 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 16:30:46,153 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 16:30:46,153 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 16:30:46,156 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 16:30:46,156 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:30:46" (1/1) ... [2021-12-22 16:30:46,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fe076d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:30:46, skipping insertion in model container [2021-12-22 16:30:46,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:30:46" (1/1) ... [2021-12-22 16:30:46,164 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 16:30:46,203 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 16:30:46,492 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:30:46,503 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 16:30:46,550 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:30:46,585 INFO L208 MainTranslator]: Completed translation [2021-12-22 16:30:46,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:30:46 WrapperNode [2021-12-22 16:30:46,586 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 16:30:46,587 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 16:30:46,587 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 16:30:46,587 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 16:30:46,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:30:46" (1/1) ... [2021-12-22 16:30:46,617 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:30:46" (1/1) ... [2021-12-22 16:30:46,641 INFO L137 Inliner]: procedures = 180, calls = 36, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 113 [2021-12-22 16:30:46,641 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 16:30:46,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 16:30:46,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 16:30:46,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 16:30:46,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:30:46" (1/1) ... [2021-12-22 16:30:46,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:30:46" (1/1) ... [2021-12-22 16:30:46,653 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:30:46" (1/1) ... [2021-12-22 16:30:46,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:30:46" (1/1) ... [2021-12-22 16:30:46,660 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:30:46" (1/1) ... [2021-12-22 16:30:46,664 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:30:46" (1/1) ... [2021-12-22 16:30:46,666 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:30:46" (1/1) ... [2021-12-22 16:30:46,669 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 16:30:46,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 16:30:46,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 16:30:46,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 16:30:46,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:30:46" (1/1) ... [2021-12-22 16:30:46,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:30:46,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:30:46,700 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) [2021-12-22 16:30:46,702 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 [2021-12-22 16:30:46,730 INFO L130 BoogieDeclarations]: Found specification of procedure calloc_model [2021-12-22 16:30:46,730 INFO L138 BoogieDeclarations]: Found implementation of procedure calloc_model [2021-12-22 16:30:46,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 16:30:46,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 16:30:46,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 16:30:46,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 16:30:46,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 16:30:46,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 16:30:46,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 16:30:46,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 16:30:46,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 16:30:46,836 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 16:30:46,853 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 16:30:47,159 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 16:30:47,166 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 16:30:47,166 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-22 16:30:47,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:30:47 BoogieIcfgContainer [2021-12-22 16:30:47,168 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 16:30:47,169 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 16:30:47,169 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 16:30:47,172 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 16:30:47,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:30:46" (1/3) ... [2021-12-22 16:30:47,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e6bb99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:30:47, skipping insertion in model container [2021-12-22 16:30:47,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:30:46" (2/3) ... [2021-12-22 16:30:47,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e6bb99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:30:47, skipping insertion in model container [2021-12-22 16:30:47,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:30:47" (3/3) ... [2021-12-22 16:30:47,175 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0219.i [2021-12-22 16:30:47,179 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 16:30:47,179 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2021-12-22 16:30:47,215 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 16:30:47,221 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-12-22 16:30:47,222 INFO L340 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2021-12-22 16:30:47,235 INFO L276 IsEmpty]: Start isEmpty. Operand has 109 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 105 states have internal predecessors, (117), 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) [2021-12-22 16:30:47,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-22 16:30:47,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:47,247 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-22 16:30:47,247 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-22 16:30:47,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:47,251 INFO L85 PathProgramCache]: Analyzing trace with hash 928072, now seen corresponding path program 1 times [2021-12-22 16:30:47,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:47,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092856488] [2021-12-22 16:30:47,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:47,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:47,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:47,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:47,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:47,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092856488] [2021-12-22 16:30:47,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092856488] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:47,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:47,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:30:47,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684251456] [2021-12-22 16:30:47,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:47,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 16:30:47,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:47,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 16:30:47,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 16:30:47,427 INFO L87 Difference]: Start difference. First operand has 109 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 105 states have internal predecessors, (117), 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 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-12-22 16:30:47,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:47,451 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2021-12-22 16:30:47,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 16:30:47,454 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) Word has length 4 [2021-12-22 16:30:47,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:47,462 INFO L225 Difference]: With dead ends: 109 [2021-12-22 16:30:47,463 INFO L226 Difference]: Without dead ends: 107 [2021-12-22 16:30:47,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 16:30:47,469 INFO L933 BasicCegarLoop]: 114 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, 114 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 [2021-12-22 16:30:47,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:30:47,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-22 16:30:47,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-12-22 16:30:47,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 58 states have (on average 1.8620689655172413) internal successors, (108), 103 states have internal predecessors, (108), 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) [2021-12-22 16:30:47,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2021-12-22 16:30:47,516 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 4 [2021-12-22 16:30:47,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:47,517 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2021-12-22 16:30:47,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-12-22 16:30:47,517 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2021-12-22 16:30:47,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 16:30:47,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:47,518 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 16:30:47,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 16:30:47,519 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting calloc_modelErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-22 16:30:47,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:47,522 INFO L85 PathProgramCache]: Analyzing trace with hash 889700811, now seen corresponding path program 1 times [2021-12-22 16:30:47,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:47,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223464693] [2021-12-22 16:30:47,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:47,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:47,556 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:30:47,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1435883549] [2021-12-22 16:30:47,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:47,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:30:47,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:30:47,562 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) [2021-12-22 16:30:47,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 16:30:47,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:47,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 16:30:47,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:30:47,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 16:30:47,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:47,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:30:47,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:47,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223464693] [2021-12-22 16:30:47,735 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:30:47,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435883549] [2021-12-22 16:30:47,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435883549] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:47,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:47,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:30:47,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001116253] [2021-12-22 16:30:47,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:47,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:30:47,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:47,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:30:47,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:30:47,743 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-12-22 16:30:47,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:47,847 INFO L93 Difference]: Finished difference Result 106 states and 111 transitions. [2021-12-22 16:30:47,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:30:47,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2021-12-22 16:30:47,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:47,850 INFO L225 Difference]: With dead ends: 106 [2021-12-22 16:30:47,851 INFO L226 Difference]: Without dead ends: 106 [2021-12-22 16:30:47,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:30:47,853 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 7 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:47,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 163 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:30:47,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-22 16:30:47,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-12-22 16:30:47,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 58 states have (on average 1.8448275862068966) internal successors, (107), 102 states have internal predecessors, (107), 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) [2021-12-22 16:30:47,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 111 transitions. [2021-12-22 16:30:47,862 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 111 transitions. Word has length 6 [2021-12-22 16:30:47,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:47,862 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 111 transitions. [2021-12-22 16:30:47,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-12-22 16:30:47,862 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 111 transitions. [2021-12-22 16:30:47,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 16:30:47,863 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:47,863 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:30:47,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 16:30:48,076 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 [2021-12-22 16:30:48,077 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting calloc_modelErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-22 16:30:48,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:48,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1810921558, now seen corresponding path program 1 times [2021-12-22 16:30:48,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:48,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710722515] [2021-12-22 16:30:48,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:48,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:48,088 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:30:48,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [871874098] [2021-12-22 16:30:48,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:48,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:30:48,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:30:48,090 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) [2021-12-22 16:30:48,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 16:30:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:48,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-22 16:30:48,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:30:48,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 16:30:48,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:48,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:30:48,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:48,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710722515] [2021-12-22 16:30:48,328 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:30:48,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871874098] [2021-12-22 16:30:48,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871874098] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:48,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:48,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:30:48,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430986918] [2021-12-22 16:30:48,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:48,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:30:48,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:48,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:30:48,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:30:48,331 INFO L87 Difference]: Start difference. First operand 106 states and 111 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2021-12-22 16:30:48,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:48,337 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2021-12-22 16:30:48,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:30:48,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 [2021-12-22 16:30:48,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:48,338 INFO L225 Difference]: With dead ends: 105 [2021-12-22 16:30:48,338 INFO L226 Difference]: Without dead ends: 105 [2021-12-22 16:30:48,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:30:48,339 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 0 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:48,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 176 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 41 Unchecked, 0.0s Time] [2021-12-22 16:30:48,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-22 16:30:48,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-12-22 16:30:48,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 58 states have (on average 1.8275862068965518) internal successors, (106), 101 states have internal predecessors, (106), 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) [2021-12-22 16:30:48,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 110 transitions. [2021-12-22 16:30:48,347 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 110 transitions. Word has length 7 [2021-12-22 16:30:48,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:48,347 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 110 transitions. [2021-12-22 16:30:48,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2021-12-22 16:30:48,348 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 110 transitions. [2021-12-22 16:30:48,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-22 16:30:48,349 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:48,349 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] [2021-12-22 16:30:48,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 16:30:48,565 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 [2021-12-22 16:30:48,566 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-22 16:30:48,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:48,566 INFO L85 PathProgramCache]: Analyzing trace with hash -713444144, now seen corresponding path program 1 times [2021-12-22 16:30:48,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:48,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964254702] [2021-12-22 16:30:48,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:48,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:48,585 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:30:48,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [587362024] [2021-12-22 16:30:48,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:48,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:30:48,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:30:48,588 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) [2021-12-22 16:30:48,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 16:30:48,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:48,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-22 16:30:48,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:30:48,798 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-22 16:30:48,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-22 16:30:48,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:30:48,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:30:48,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:48,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964254702] [2021-12-22 16:30:48,803 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:30:48,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587362024] [2021-12-22 16:30:48,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587362024] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:48,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:48,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 16:30:48,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895593164] [2021-12-22 16:30:48,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:48,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 16:30:48,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:48,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 16:30:48,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:30:48,806 INFO L87 Difference]: Start difference. First operand 105 states and 110 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 16:30:49,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:49,008 INFO L93 Difference]: Finished difference Result 132 states and 138 transitions. [2021-12-22 16:30:49,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 16:30:49,009 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-12-22 16:30:49,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:49,014 INFO L225 Difference]: With dead ends: 132 [2021-12-22 16:30:49,014 INFO L226 Difference]: Without dead ends: 132 [2021-12-22 16:30:49,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-22 16:30:49,018 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 69 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:49,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 344 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:30:49,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-22 16:30:49,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 102. [2021-12-22 16:30:49,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 58 states have (on average 1.7758620689655173) internal successors, (103), 98 states have internal predecessors, (103), 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) [2021-12-22 16:30:49,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2021-12-22 16:30:49,039 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 26 [2021-12-22 16:30:49,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:49,040 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2021-12-22 16:30:49,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 16:30:49,040 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2021-12-22 16:30:49,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-22 16:30:49,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:49,041 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] [2021-12-22 16:30:49,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 16:30:49,241 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 [2021-12-22 16:30:49,242 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-22 16:30:49,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:49,242 INFO L85 PathProgramCache]: Analyzing trace with hash -713444143, now seen corresponding path program 1 times [2021-12-22 16:30:49,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:49,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003986201] [2021-12-22 16:30:49,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:49,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:49,255 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:30:49,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1990048459] [2021-12-22 16:30:49,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:49,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:30:49,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:30:49,257 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) [2021-12-22 16:30:49,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 16:30:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:49,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-22 16:30:49,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:30:52,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:30:52,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-22 16:30:52,237 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 16:30:52,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 16:30:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:30:52,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:30:52,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:52,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003986201] [2021-12-22 16:30:52,303 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:30:52,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990048459] [2021-12-22 16:30:52,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990048459] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:52,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:52,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 16:30:52,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736596091] [2021-12-22 16:30:52,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:52,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 16:30:52,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:52,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 16:30:52,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=70, Unknown=1, NotChecked=0, Total=90 [2021-12-22 16:30:52,306 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 16:30:52,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:52,316 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2021-12-22 16:30:52,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 16:30:52,316 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-12-22 16:30:52,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:52,317 INFO L225 Difference]: With dead ends: 110 [2021-12-22 16:30:52,317 INFO L226 Difference]: Without dead ends: 110 [2021-12-22 16:30:52,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=19, Invalid=70, Unknown=1, NotChecked=0, Total=90 [2021-12-22 16:30:52,320 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 0 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 384 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:52,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 490 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 384 Unchecked, 0.0s Time] [2021-12-22 16:30:52,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-22 16:30:52,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-12-22 16:30:52,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 65 states have (on average 1.7076923076923076) internal successors, (111), 105 states have internal predecessors, (111), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-22 16:30:52,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 117 transitions. [2021-12-22 16:30:52,341 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 117 transitions. Word has length 26 [2021-12-22 16:30:52,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:52,342 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 117 transitions. [2021-12-22 16:30:52,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 16:30:52,342 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 117 transitions. [2021-12-22 16:30:52,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 16:30:52,343 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:52,343 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] [2021-12-22 16:30:52,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 16:30:52,567 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 [2021-12-22 16:30:52,567 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-22 16:30:52,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:52,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1369822126, now seen corresponding path program 1 times [2021-12-22 16:30:52,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:52,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796164021] [2021-12-22 16:30:52,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:52,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:52,586 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:30:52,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [544474845] [2021-12-22 16:30:52,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:52,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:30:52,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:30:52,597 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) [2021-12-22 16:30:52,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 16:30:52,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:52,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-22 16:30:52,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:30:52,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-22 16:30:52,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:30:53,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-22 16:30:53,011 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 16:30:53,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 16:30:53,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 16:30:53,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:30:53,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:53,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796164021] [2021-12-22 16:30:53,034 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:30:53,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544474845] [2021-12-22 16:30:53,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544474845] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:53,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:53,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 16:30:53,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755520610] [2021-12-22 16:30:53,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:53,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 16:30:53,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:53,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 16:30:53,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-22 16:30:53,037 INFO L87 Difference]: Start difference. First operand 110 states and 117 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 16:30:53,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:53,184 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2021-12-22 16:30:53,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 16:30:53,185 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2021-12-22 16:30:53,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:53,186 INFO L225 Difference]: With dead ends: 109 [2021-12-22 16:30:53,186 INFO L226 Difference]: Without dead ends: 109 [2021-12-22 16:30:53,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-22 16:30:53,187 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 8 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:53,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 327 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 165 Invalid, 0 Unknown, 107 Unchecked, 0.1s Time] [2021-12-22 16:30:53,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-22 16:30:53,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 101. [2021-12-22 16:30:53,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 58 states have (on average 1.7586206896551724) internal successors, (102), 97 states have internal predecessors, (102), 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) [2021-12-22 16:30:53,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2021-12-22 16:30:53,191 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 27 [2021-12-22 16:30:53,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:53,191 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2021-12-22 16:30:53,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 16:30:53,191 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2021-12-22 16:30:53,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-22 16:30:53,192 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:53,192 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] [2021-12-22 16:30:53,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 16:30:53,403 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 [2021-12-22 16:30:53,404 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-22 16:30:53,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:53,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1574944978, now seen corresponding path program 1 times [2021-12-22 16:30:53,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:53,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572540226] [2021-12-22 16:30:53,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:53,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:53,417 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:30:53,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061256680] [2021-12-22 16:30:53,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:53,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:30:53,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:30:53,419 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) [2021-12-22 16:30:53,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 16:30:53,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:53,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 16:30:53,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:30:53,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 16:30:53,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:30:53,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:53,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572540226] [2021-12-22 16:30:53,540 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:30:53,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061256680] [2021-12-22 16:30:53,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061256680] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:30:53,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:30:53,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:30:53,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581579468] [2021-12-22 16:30:53,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:30:53,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:30:53,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:53,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:30:53,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:30:53,543 INFO L87 Difference]: Start difference. First operand 101 states and 106 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 16:30:53,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:53,592 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2021-12-22 16:30:53,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:30:53,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-12-22 16:30:53,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:53,594 INFO L225 Difference]: With dead ends: 103 [2021-12-22 16:30:53,594 INFO L226 Difference]: Without dead ends: 103 [2021-12-22 16:30:53,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:30:53,595 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 84 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:53,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 91 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:30:53,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-22 16:30:53,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2021-12-22 16:30:53,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 58 states have (on average 1.7413793103448276) internal successors, (101), 96 states have internal predecessors, (101), 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) [2021-12-22 16:30:53,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2021-12-22 16:30:53,599 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 28 [2021-12-22 16:30:53,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:53,599 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2021-12-22 16:30:53,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 16:30:53,599 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2021-12-22 16:30:53,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 16:30:53,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:53,600 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, 1, 1] [2021-12-22 16:30:53,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 16:30:53,805 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 [2021-12-22 16:30:53,806 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-22 16:30:53,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:53,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1693634963, now seen corresponding path program 1 times [2021-12-22 16:30:53,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:53,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304397208] [2021-12-22 16:30:53,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:53,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:53,829 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:30:53,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [540903867] [2021-12-22 16:30:53,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:53,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:30:53,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:30:53,831 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) [2021-12-22 16:30:53,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 16:30:53,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:53,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-22 16:30:53,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:30:54,067 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 16:30:54,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-22 16:30:54,091 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 16:30:54,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-22 16:30:54,110 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:54,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:30:54,364 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-22 16:30:54,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2021-12-22 16:30:54,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:30:54,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:54,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304397208] [2021-12-22 16:30:54,371 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:30:54,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540903867] [2021-12-22 16:30:54,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540903867] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:30:54,371 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:30:54,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-12-22 16:30:54,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439730471] [2021-12-22 16:30:54,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:30:54,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 16:30:54,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:54,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 16:30:54,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-12-22 16:30:54,372 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-22 16:30:54,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:54,605 INFO L93 Difference]: Finished difference Result 139 states and 146 transitions. [2021-12-22 16:30:54,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 16:30:54,606 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-12-22 16:30:54,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:54,607 INFO L225 Difference]: With dead ends: 139 [2021-12-22 16:30:54,607 INFO L226 Difference]: Without dead ends: 139 [2021-12-22 16:30:54,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-12-22 16:30:54,607 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 93 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:54,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 539 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 338 Invalid, 0 Unknown, 154 Unchecked, 0.2s Time] [2021-12-22 16:30:54,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-22 16:30:54,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 109. [2021-12-22 16:30:54,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 67 states have (on average 1.6417910447761195) internal successors, (110), 104 states have internal predecessors, (110), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 16:30:54,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 116 transitions. [2021-12-22 16:30:54,611 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 116 transitions. Word has length 30 [2021-12-22 16:30:54,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:54,611 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 116 transitions. [2021-12-22 16:30:54,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-22 16:30:54,611 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 116 transitions. [2021-12-22 16:30:54,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 16:30:54,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:54,612 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, 1, 1] [2021-12-22 16:30:54,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 16:30:54,812 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 [2021-12-22 16:30:54,813 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-22 16:30:54,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:54,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1693634964, now seen corresponding path program 1 times [2021-12-22 16:30:54,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:54,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596376524] [2021-12-22 16:30:54,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:54,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:54,824 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:30:54,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1573038212] [2021-12-22 16:30:54,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:54,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:30:54,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:30:54,827 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:30:54,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 16:30:54,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:54,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-22 16:30:54,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:31:06,994 WARN L227 SmtUtils]: Spent 8.19s on a formula simplification that was a NOOP. DAG size: 9 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-22 16:31:10,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:31:10,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-22 16:31:10,763 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-22 16:31:10,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-22 16:31:12,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:31:12,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-22 16:31:12,550 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 16:31:12,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 16:31:15,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:31:15,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:31:16,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:31:16,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596376524] [2021-12-22 16:31:16,264 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:31:16,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573038212] [2021-12-22 16:31:16,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573038212] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:31:16,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-22 16:31:16,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-12-22 16:31:16,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856119103] [2021-12-22 16:31:16,265 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-22 16:31:16,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 16:31:16,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:31:16,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 16:31:16,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=177, Unknown=1, NotChecked=0, Total=210 [2021-12-22 16:31:16,266 INFO L87 Difference]: Start difference. First operand 109 states and 116 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:31:36,874 WARN L227 SmtUtils]: Spent 14.37s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-22 16:31:43,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:31:43,217 INFO L93 Difference]: Finished difference Result 125 states and 137 transitions. [2021-12-22 16:31:43,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 16:31:43,218 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2021-12-22 16:31:43,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:31:43,219 INFO L225 Difference]: With dead ends: 125 [2021-12-22 16:31:43,219 INFO L226 Difference]: Without dead ends: 125 [2021-12-22 16:31:43,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=54, Invalid=320, Unknown=6, NotChecked=0, Total=380 [2021-12-22 16:31:43,220 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 2 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 419 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:31:43,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 541 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 419 Unchecked, 0.1s Time] [2021-12-22 16:31:43,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-12-22 16:31:43,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-12-22 16:31:43,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 81 states have (on average 1.5432098765432098) internal successors, (125), 118 states have internal predecessors, (125), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-22 16:31:43,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 137 transitions. [2021-12-22 16:31:43,224 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 137 transitions. Word has length 30 [2021-12-22 16:31:43,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:31:43,224 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 137 transitions. [2021-12-22 16:31:43,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:31:43,225 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 137 transitions. [2021-12-22 16:31:43,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-22 16:31:43,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:31:43,225 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, 1, 1, 1] [2021-12-22 16:31:43,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 16:31:43,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-22 16:31:43,426 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-22 16:31:43,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:31:43,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1893307035, now seen corresponding path program 1 times [2021-12-22 16:31:43,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:31:43,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31148958] [2021-12-22 16:31:43,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:43,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:31:43,437 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:31:43,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261791914] [2021-12-22 16:31:43,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:43,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:31:43,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:31:43,445 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:31:43,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 16:31:43,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:43,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-22 16:31:43,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:31:44,802 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 16:31:44,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-22 16:31:45,143 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-22 16:31:45,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-22 16:31:45,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:31:45,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 16:31:45,716 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 16:31:45,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 16:31:46,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:31:46,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:31:46,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:31:46,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31148958] [2021-12-22 16:31:46,859 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:31:46,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261791914] [2021-12-22 16:31:46,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261791914] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:31:46,859 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-22 16:31:46,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-12-22 16:31:46,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245702707] [2021-12-22 16:31:46,860 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-22 16:31:46,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 16:31:46,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:31:46,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 16:31:46,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-12-22 16:31:46,861 INFO L87 Difference]: Start difference. First operand 125 states and 137 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:31:47,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:31:47,212 INFO L93 Difference]: Finished difference Result 125 states and 136 transitions. [2021-12-22 16:31:47,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 16:31:47,213 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2021-12-22 16:31:47,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:31:47,214 INFO L225 Difference]: With dead ends: 125 [2021-12-22 16:31:47,214 INFO L226 Difference]: Without dead ends: 125 [2021-12-22 16:31:47,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-12-22 16:31:47,215 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 2 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 469 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:31:47,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 544 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 469 Unchecked, 0.1s Time] [2021-12-22 16:31:47,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-12-22 16:31:47,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 109. [2021-12-22 16:31:47,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 67 states have (on average 1.626865671641791) internal successors, (109), 104 states have internal predecessors, (109), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 16:31:47,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2021-12-22 16:31:47,219 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 31 [2021-12-22 16:31:47,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:31:47,219 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2021-12-22 16:31:47,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:31:47,219 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2021-12-22 16:31:47,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-22 16:31:47,220 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:31:47,220 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, 1, 1, 1] [2021-12-22 16:31:47,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 16:31:47,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-22 16:31:47,431 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-22 16:31:47,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:31:47,432 INFO L85 PathProgramCache]: Analyzing trace with hash 963076315, now seen corresponding path program 1 times [2021-12-22 16:31:47,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:31:47,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138244519] [2021-12-22 16:31:47,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:47,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:31:47,440 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:31:47,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [631669085] [2021-12-22 16:31:47,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:47,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:31:47,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:31:47,442 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:31:47,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 16:31:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:47,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-22 16:31:47,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:31:47,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-12-22 16:31:47,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 16:31:49,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:31:49,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-22 16:31:49,811 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 16:31:49,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 16:31:50,915 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:31:50,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:31:50,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:31:50,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138244519] [2021-12-22 16:31:50,916 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:31:50,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631669085] [2021-12-22 16:31:50,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631669085] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:31:50,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:31:50,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 16:31:50,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527804819] [2021-12-22 16:31:50,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:31:50,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 16:31:50,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:31:50,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 16:31:50,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-22 16:31:50,918 INFO L87 Difference]: Start difference. First operand 109 states and 115 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 16:31:50,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:31:50,923 INFO L93 Difference]: Finished difference Result 131 states and 141 transitions. [2021-12-22 16:31:50,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 16:31:50,923 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2021-12-22 16:31:50,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:31:50,924 INFO L225 Difference]: With dead ends: 131 [2021-12-22 16:31:50,924 INFO L226 Difference]: Without dead ends: 131 [2021-12-22 16:31:50,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-22 16:31:50,925 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 3 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:31:50,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 440 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 288 Unchecked, 0.0s Time] [2021-12-22 16:31:50,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-22 16:31:50,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2021-12-22 16:31:50,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 87 states have (on average 1.5172413793103448) internal successors, (132), 123 states have internal predecessors, (132), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-22 16:31:50,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 141 transitions. [2021-12-22 16:31:50,929 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 141 transitions. Word has length 31 [2021-12-22 16:31:50,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:31:50,930 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 141 transitions. [2021-12-22 16:31:50,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 16:31:50,930 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 141 transitions. [2021-12-22 16:31:50,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-22 16:31:50,931 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:31:50,931 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, 1, 1, 1, 1] [2021-12-22 16:31:50,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 16:31:51,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-22 16:31:51,157 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-22 16:31:51,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:31:51,157 INFO L85 PathProgramCache]: Analyzing trace with hash -648384006, now seen corresponding path program 1 times [2021-12-22 16:31:51,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:31:51,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847375998] [2021-12-22 16:31:51,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:51,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:31:51,174 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:31:51,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [549783297] [2021-12-22 16:31:51,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:31:51,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:31:51,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:31:51,181 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:31:51,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 16:31:51,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:31:51,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-22 16:31:51,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:31:51,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 16:31:51,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9