./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/indp1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/indp1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9d155444443faf1f00dab96cdb68719b0ba1edb1979e11b3fea5d29001e4f12f --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 21:50:47,552 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 21:50:47,555 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 21:50:47,615 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 21:50:47,616 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 21:50:47,619 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 21:50:47,620 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 21:50:47,624 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 21:50:47,627 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 21:50:47,628 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 21:50:47,629 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 21:50:47,631 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 21:50:47,631 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 21:50:47,633 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 21:50:47,634 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 21:50:47,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 21:50:47,636 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 21:50:47,636 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 21:50:47,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 21:50:47,640 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 21:50:47,642 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 21:50:47,643 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 21:50:47,644 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 21:50:47,647 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 21:50:47,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 21:50:47,652 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 21:50:47,652 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 21:50:47,653 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 21:50:47,654 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 21:50:47,655 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 21:50:47,655 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 21:50:47,656 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 21:50:47,657 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 21:50:47,658 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 21:50:47,659 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 21:50:47,659 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 21:50:47,660 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 21:50:47,660 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 21:50:47,660 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 21:50:47,661 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 21:50:47,662 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 21:50:47,664 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 21:50:47,688 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 21:50:47,688 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 21:50:47,688 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 21:50:47,689 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 21:50:47,689 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 21:50:47,690 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 21:50:47,691 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 21:50:47,691 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 21:50:47,691 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 21:50:47,691 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 21:50:47,692 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 21:50:47,692 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 21:50:47,693 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 21:50:47,693 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 21:50:47,693 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 21:50:47,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 21:50:47,693 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 21:50:47,694 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 21:50:47,694 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 21:50:47,694 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 21:50:47,694 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 21:50:47,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 21:50:47,695 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 21:50:47,695 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 21:50:47,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:50:47,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 21:50:47,695 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 21:50:47,697 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 21:50:47,697 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 21:50:47,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 21:50:47,697 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 21:50:47,697 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 21:50:47,698 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 21:50:47,698 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 21:50:47,698 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9d155444443faf1f00dab96cdb68719b0ba1edb1979e11b3fea5d29001e4f12f [2021-12-15 21:50:47,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 21:50:47,951 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 21:50:47,954 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 21:50:47,955 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 21:50:47,956 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 21:50:47,957 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/indp1.c [2021-12-15 21:50:48,013 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e72fada5b/c871034165d648b080d2359db0d3e0c5/FLAG16bfbd17f [2021-12-15 21:50:48,393 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 21:50:48,394 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/indp1.c [2021-12-15 21:50:48,404 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e72fada5b/c871034165d648b080d2359db0d3e0c5/FLAG16bfbd17f [2021-12-15 21:50:48,802 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e72fada5b/c871034165d648b080d2359db0d3e0c5 [2021-12-15 21:50:48,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 21:50:48,806 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 21:50:48,811 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 21:50:48,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 21:50:48,815 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 21:50:48,816 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:50:48" (1/1) ... [2021-12-15 21:50:48,817 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62a2fb80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:48, skipping insertion in model container [2021-12-15 21:50:48,817 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:50:48" (1/1) ... [2021-12-15 21:50:48,823 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 21:50:48,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 21:50:48,949 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/indp1.c[588,601] [2021-12-15 21:50:48,984 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:50:48,994 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 21:50:49,010 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/indp1.c[588,601] [2021-12-15 21:50:49,025 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:50:49,038 INFO L208 MainTranslator]: Completed translation [2021-12-15 21:50:49,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:49 WrapperNode [2021-12-15 21:50:49,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 21:50:49,040 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 21:50:49,040 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 21:50:49,040 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 21:50:49,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:49" (1/1) ... [2021-12-15 21:50:49,059 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:49" (1/1) ... [2021-12-15 21:50:49,082 INFO L137 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2021-12-15 21:50:49,082 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 21:50:49,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 21:50:49,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 21:50:49,083 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 21:50:49,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:49" (1/1) ... [2021-12-15 21:50:49,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:49" (1/1) ... [2021-12-15 21:50:49,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:49" (1/1) ... [2021-12-15 21:50:49,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:49" (1/1) ... [2021-12-15 21:50:49,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:49" (1/1) ... [2021-12-15 21:50:49,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:49" (1/1) ... [2021-12-15 21:50:49,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:49" (1/1) ... [2021-12-15 21:50:49,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 21:50:49,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 21:50:49,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 21:50:49,123 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 21:50:49,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:49" (1/1) ... [2021-12-15 21:50:49,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:50:49,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:50:49,152 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) [2021-12-15 21:50:49,178 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 [2021-12-15 21:50:49,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 21:50:49,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 21:50:49,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 21:50:49,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 21:50:49,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 21:50:49,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 21:50:49,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 21:50:49,258 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 21:50:49,259 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 21:50:49,425 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 21:50:49,430 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 21:50:49,431 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-15 21:50:49,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:50:49 BoogieIcfgContainer [2021-12-15 21:50:49,432 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 21:50:49,434 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 21:50:49,434 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 21:50:49,437 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 21:50:49,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:50:48" (1/3) ... [2021-12-15 21:50:49,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@532db45e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:50:49, skipping insertion in model container [2021-12-15 21:50:49,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:49" (2/3) ... [2021-12-15 21:50:49,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@532db45e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:50:49, skipping insertion in model container [2021-12-15 21:50:49,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:50:49" (3/3) ... [2021-12-15 21:50:49,440 INFO L111 eAbstractionObserver]: Analyzing ICFG indp1.c [2021-12-15 21:50:49,444 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 21:50:49,445 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 21:50:49,481 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 21:50:49,486 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 21:50:49,487 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 21:50:49,497 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 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) [2021-12-15 21:50:49,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-15 21:50:49,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:50:49,503 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:50:49,503 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:50:49,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:50:49,508 INFO L85 PathProgramCache]: Analyzing trace with hash -592971038, now seen corresponding path program 1 times [2021-12-15 21:50:49,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:50:49,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176158586] [2021-12-15 21:50:49,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:50:49,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:50:49,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:50:49,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:50:49,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:50:49,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176158586] [2021-12-15 21:50:49,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176158586] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:50:49,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:50:49,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 21:50:49,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072080929] [2021-12-15 21:50:49,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:50:49,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 21:50:49,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:50:49,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 21:50:49,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 21:50:49,688 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 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) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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) [2021-12-15 21:50:49,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:50:49,703 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2021-12-15 21:50:49,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 21:50:49,705 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 14 [2021-12-15 21:50:49,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:50:49,713 INFO L225 Difference]: With dead ends: 44 [2021-12-15 21:50:49,713 INFO L226 Difference]: Without dead ends: 20 [2021-12-15 21:50:49,716 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 [2021-12-15 21:50:49,723 INFO L933 BasicCegarLoop]: 28 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, 28 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 [2021-12-15 21:50:49,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:50:49,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-15 21:50:49,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-12-15 21:50:49,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 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) [2021-12-15 21:50:49,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-12-15 21:50:49,774 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2021-12-15 21:50:49,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:50:49,774 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-12-15 21:50:49,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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) [2021-12-15 21:50:49,774 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-12-15 21:50:49,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-15 21:50:49,775 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:50:49,775 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:50:49,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 21:50:49,775 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:50:49,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:50:49,776 INFO L85 PathProgramCache]: Analyzing trace with hash 108093540, now seen corresponding path program 1 times [2021-12-15 21:50:49,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:50:49,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529964540] [2021-12-15 21:50:49,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:50:49,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:50:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:50:49,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:50:49,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:50:49,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529964540] [2021-12-15 21:50:49,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529964540] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:50:49,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:50:49,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 21:50:49,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020376409] [2021-12-15 21:50:49,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:50:49,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 21:50:49,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:50:49,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 21:50:49,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 21:50:49,869 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-12-15 21:50:49,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:50:49,920 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2021-12-15 21:50:49,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 21:50:49,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2021-12-15 21:50:49,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:50:49,921 INFO L225 Difference]: With dead ends: 45 [2021-12-15 21:50:49,922 INFO L226 Difference]: Without dead ends: 32 [2021-12-15 21:50:49,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 21:50:49,923 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:50:49,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 16 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:50:49,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-15 21:50:49,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-12-15 21:50:49,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 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) [2021-12-15 21:50:49,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-12-15 21:50:49,930 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-12-15 21:50:49,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:50:49,930 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-12-15 21:50:49,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-12-15 21:50:49,931 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-12-15 21:50:49,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-15 21:50:49,931 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:50:49,931 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:50:49,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 21:50:49,932 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:50:49,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:50:49,933 INFO L85 PathProgramCache]: Analyzing trace with hash 615941150, now seen corresponding path program 1 times [2021-12-15 21:50:49,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:50:49,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844938626] [2021-12-15 21:50:49,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:50:49,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:50:49,947 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 21:50:49,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1891140507] [2021-12-15 21:50:49,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:50:49,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:50:49,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:50:49,955 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) [2021-12-15 21:50:49,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 21:50:50,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:50:50,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-15 21:50:50,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:50:50,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2021-12-15 21:50:50,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-12-15 21:50:50,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-12-15 21:50:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:50:50,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:50:50,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2021-12-15 21:50:50,738 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 21:50:50,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 61 [2021-12-15 21:51:03,887 WARN L227 SmtUtils]: Spent 13.12s on a formula simplification that was a NOOP. DAG size: 5 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-15 21:51:03,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 11 [2021-12-15 21:51:03,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-12-15 21:51:17,165 WARN L227 SmtUtils]: Spent 13.21s on a formula simplification. DAG size of input: 25 DAG size of output: 13 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-12-15 21:51:17,165 INFO L354 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2021-12-15 21:51:17,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 51 [2021-12-15 21:51:17,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:51:17,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:51:17,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844938626] [2021-12-15 21:51:17,229 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 21:51:17,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891140507] [2021-12-15 21:51:17,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891140507] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:51:17,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:51:17,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 9 [2021-12-15 21:51:17,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219775556] [2021-12-15 21:51:17,230 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:51:17,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 21:51:17,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:51:17,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 21:51:17,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-15 21:51:17,232 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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) [2021-12-15 21:51:17,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:51:17,495 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2021-12-15 21:51:17,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 21:51:17,496 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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 20 [2021-12-15 21:51:17,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:51:17,497 INFO L225 Difference]: With dead ends: 69 [2021-12-15 21:51:17,497 INFO L226 Difference]: Without dead ends: 67 [2021-12-15 21:51:17,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-12-15 21:51:17,499 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 55 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:51:17,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 77 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 21:51:17,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-15 21:51:17,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 42. [2021-12-15 21:51:17,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 states have internal predecessors, (51), 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) [2021-12-15 21:51:17,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2021-12-15 21:51:17,506 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 20 [2021-12-15 21:51:17,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:51:17,506 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2021-12-15 21:51:17,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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) [2021-12-15 21:51:17,506 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2021-12-15 21:51:17,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-15 21:51:17,508 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:51:17,508 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:51:17,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 21:51:17,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:51:17,724 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:51:17,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:51:17,724 INFO L85 PathProgramCache]: Analyzing trace with hash 678263444, now seen corresponding path program 1 times [2021-12-15 21:51:17,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:51:17,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255135816] [2021-12-15 21:51:17,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:51:17,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:51:17,736 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 21:51:17,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1280356920] [2021-12-15 21:51:17,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:51:17,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:51:17,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:51:17,738 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) [2021-12-15 21:51:17,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 21:51:17,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:51:17,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 21:51:17,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:51:17,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 21:51:17,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:51:17,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 21:51:17,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:51:17,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255135816] [2021-12-15 21:51:17,951 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 21:51:17,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280356920] [2021-12-15 21:51:17,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280356920] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:51:17,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:51:17,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-15 21:51:17,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191559367] [2021-12-15 21:51:17,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:51:17,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 21:51:17,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:51:17,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 21:51:17,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-15 21:51:17,957 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 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) [2021-12-15 21:51:18,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:51:18,068 INFO L93 Difference]: Finished difference Result 110 states and 129 transitions. [2021-12-15 21:51:18,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 21:51:18,068 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 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 24 [2021-12-15 21:51:18,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:51:18,069 INFO L225 Difference]: With dead ends: 110 [2021-12-15 21:51:18,070 INFO L226 Difference]: Without dead ends: 70 [2021-12-15 21:51:18,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-15 21:51:18,071 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:51:18,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 44 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:51:18,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-15 21:51:18,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 53. [2021-12-15 21:51:18,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 52 states have internal predecessors, (61), 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) [2021-12-15 21:51:18,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-12-15 21:51:18,079 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 24 [2021-12-15 21:51:18,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:51:18,079 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-12-15 21:51:18,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 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) [2021-12-15 21:51:18,079 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-12-15 21:51:18,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-15 21:51:18,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:51:18,080 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:51:18,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 21:51:18,307 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,SelfDestructingSolverStorable3 [2021-12-15 21:51:18,308 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:51:18,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:51:18,308 INFO L85 PathProgramCache]: Analyzing trace with hash 900948378, now seen corresponding path program 2 times [2021-12-15 21:51:18,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:51:18,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353443776] [2021-12-15 21:51:18,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:51:18,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:51:18,321 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 21:51:18,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1676399924] [2021-12-15 21:51:18,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:51:18,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:51:18,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:51:18,326 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) [2021-12-15 21:51:18,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 21:51:18,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:51:18,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:51:18,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 21:51:18,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:51:18,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 21:51:18,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:51:18,490 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 21:51:18,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:51:18,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353443776] [2021-12-15 21:51:18,491 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 21:51:18,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676399924] [2021-12-15 21:51:18,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676399924] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:51:18,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:51:18,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-15 21:51:18,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422179541] [2021-12-15 21:51:18,492 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:51:18,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 21:51:18,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:51:18,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 21:51:18,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-15 21:51:18,495 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 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) [2021-12-15 21:51:18,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:51:18,619 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2021-12-15 21:51:18,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 21:51:18,620 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 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 24 [2021-12-15 21:51:18,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:51:18,621 INFO L225 Difference]: With dead ends: 69 [2021-12-15 21:51:18,621 INFO L226 Difference]: Without dead ends: 60 [2021-12-15 21:51:18,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-12-15 21:51:18,622 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 73 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:51:18,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 38 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:51:18,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-15 21:51:18,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2021-12-15 21:51:18,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 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) [2021-12-15 21:51:18,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-12-15 21:51:18,628 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 24 [2021-12-15 21:51:18,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:51:18,629 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-12-15 21:51:18,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 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) [2021-12-15 21:51:18,629 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-12-15 21:51:18,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-15 21:51:18,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:51:18,630 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:51:18,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 21:51:18,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:51:18,851 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:51:18,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:51:18,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1587482582, now seen corresponding path program 3 times [2021-12-15 21:51:18,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:51:18,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536251153] [2021-12-15 21:51:18,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:51:18,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:51:18,872 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 21:51:18,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1534917117] [2021-12-15 21:51:18,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:51:18,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:51:18,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:51:18,877 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) [2021-12-15 21:51:18,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 21:51:18,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-15 21:51:18,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:51:18,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 21:51:18,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:51:19,075 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 21:51:19,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:51:19,202 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 21:51:19,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:51:19,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536251153] [2021-12-15 21:51:19,203 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 21:51:19,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534917117] [2021-12-15 21:51:19,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534917117] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:51:19,204 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:51:19,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-12-15 21:51:19,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108288117] [2021-12-15 21:51:19,204 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:51:19,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-15 21:51:19,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:51:19,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-15 21:51:19,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-15 21:51:19,206 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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) [2021-12-15 21:51:19,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:51:19,376 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2021-12-15 21:51:19,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 21:51:19,377 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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 28 [2021-12-15 21:51:19,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:51:19,378 INFO L225 Difference]: With dead ends: 107 [2021-12-15 21:51:19,378 INFO L226 Difference]: Without dead ends: 89 [2021-12-15 21:51:19,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-12-15 21:51:19,379 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 107 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:51:19,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 56 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:51:19,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-15 21:51:19,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 63. [2021-12-15 21:51:19,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 62 states have internal predecessors, (70), 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) [2021-12-15 21:51:19,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2021-12-15 21:51:19,387 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 28 [2021-12-15 21:51:19,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:51:19,388 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2021-12-15 21:51:19,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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) [2021-12-15 21:51:19,388 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2021-12-15 21:51:19,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-15 21:51:19,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:51:19,389 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:51:19,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 21:51:19,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:51:19,615 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:51:19,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:51:19,616 INFO L85 PathProgramCache]: Analyzing trace with hash -227434410, now seen corresponding path program 4 times [2021-12-15 21:51:19,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:51:19,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791188718] [2021-12-15 21:51:19,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:51:19,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:51:19,629 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 21:51:19,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [909506789] [2021-12-15 21:51:19,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 21:51:19,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:51:19,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:51:19,631 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) [2021-12-15 21:51:19,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 21:51:19,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 21:51:19,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:51:19,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 21:51:19,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:51:19,780 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 21:51:19,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:51:19,855 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 21:51:19,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:51:19,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791188718] [2021-12-15 21:51:19,856 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 21:51:19,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909506789] [2021-12-15 21:51:19,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909506789] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:51:19,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:51:19,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-12-15 21:51:19,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217478690] [2021-12-15 21:51:19,857 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:51:19,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-15 21:51:19,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:51:19,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-15 21:51:19,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-15 21:51:19,860 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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) [2021-12-15 21:51:20,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:51:20,069 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2021-12-15 21:51:20,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-15 21:51:20,070 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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 28 [2021-12-15 21:51:20,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:51:20,071 INFO L225 Difference]: With dead ends: 91 [2021-12-15 21:51:20,071 INFO L226 Difference]: Without dead ends: 76 [2021-12-15 21:51:20,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-12-15 21:51:20,072 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 88 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:51:20,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 84 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:51:20,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-15 21:51:20,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2021-12-15 21:51:20,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 53 states have internal predecessors, (58), 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) [2021-12-15 21:51:20,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-12-15 21:51:20,078 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 28 [2021-12-15 21:51:20,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:51:20,078 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-12-15 21:51:20,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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) [2021-12-15 21:51:20,078 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-12-15 21:51:20,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-15 21:51:20,079 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:51:20,079 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:51:20,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 21:51:20,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:51:20,296 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:51:20,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:51:20,296 INFO L85 PathProgramCache]: Analyzing trace with hash 341343694, now seen corresponding path program 2 times [2021-12-15 21:51:20,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:51:20,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516184495] [2021-12-15 21:51:20,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:51:20,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:51:20,309 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 21:51:20,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [37164879] [2021-12-15 21:51:20,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:51:20,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:51:20,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:51:20,311 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) [2021-12-15 21:51:20,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 21:51:20,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:51:20,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:51:20,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-15 21:51:20,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:51:20,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2021-12-15 21:51:20,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 58 treesize of output 51 [2021-12-15 21:51:20,495 INFO L354 Elim1Store]: treesize reduction 66, result has 18.5 percent of original size [2021-12-15 21:51:20,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 64 [2021-12-15 21:51:20,515 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-15 21:51:20,515 INFO L388 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 43 treesize of output 26 [2021-12-15 21:51:20,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 31 treesize of output 15 [2021-12-15 21:51:20,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 102 treesize of output 91 [2021-12-15 21:51:20,623 INFO L354 Elim1Store]: treesize reduction 213, result has 15.1 percent of original size [2021-12-15 21:51:20,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 90 treesize of output 110 [2021-12-15 21:51:20,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:20,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:20,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:20,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 22 [2021-12-15 21:51:20,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 31 treesize of output 15 [2021-12-15 21:51:20,759 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:51:20,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:51:21,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2021-12-15 21:51:21,428 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 21:51:21,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 61 [2021-12-15 21:51:21,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-12-15 21:51:21,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 11 [2021-12-15 21:51:34,720 WARN L227 SmtUtils]: Spent 13.24s on a formula simplification. DAG size of input: 26 DAG size of output: 14 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-12-15 21:51:34,720 INFO L354 Elim1Store]: treesize reduction 43, result has 21.8 percent of original size [2021-12-15 21:51:34,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 51 [2021-12-15 21:51:34,780 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:51:34,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:51:34,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516184495] [2021-12-15 21:51:34,780 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 21:51:34,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37164879] [2021-12-15 21:51:34,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37164879] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:51:34,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:51:34,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 22 [2021-12-15 21:51:34,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420337773] [2021-12-15 21:51:34,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:51:34,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-15 21:51:34,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:51:34,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-15 21:51:34,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-12-15 21:51:34,782 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 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) [2021-12-15 21:51:48,316 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 13.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-12-15 21:52:01,453 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 13.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-12-15 21:52:01,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:52:01,683 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2021-12-15 21:52:01,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-15 21:52:01,684 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 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 30 [2021-12-15 21:52:01,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:52:01,685 INFO L225 Difference]: With dead ends: 68 [2021-12-15 21:52:01,685 INFO L226 Difference]: Without dead ends: 47 [2021-12-15 21:52:01,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-12-15 21:52:01,686 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 34 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 37 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 26.7s IncrementalHoareTripleChecker+Time [2021-12-15 21:52:01,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 188 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 366 Invalid, 2 Unknown, 29 Unchecked, 26.7s Time] [2021-12-15 21:52:01,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-15 21:52:01,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2021-12-15 21:52:01,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 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) [2021-12-15 21:52:01,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-12-15 21:52:01,689 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 30 [2021-12-15 21:52:01,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:52:01,689 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-12-15 21:52:01,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 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) [2021-12-15 21:52:01,689 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-12-15 21:52:01,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-15 21:52:01,690 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:52:01,691 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:52:01,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 21:52:01,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:52:01,903 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:52:01,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:52:01,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1505554158, now seen corresponding path program 5 times [2021-12-15 21:52:01,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:52:01,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640121902] [2021-12-15 21:52:01,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:52:01,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:52:01,918 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 21:52:01,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1663019048] [2021-12-15 21:52:01,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 21:52:01,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:52:01,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:52:01,922 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) [2021-12-15 21:52:01,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process