./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.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 1aca3c96522e618238f11f200c96e0ec490e756d4e04895bd2a51f9a4ff85af1 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 10:57:36,184 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 10:57:36,186 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 10:57:36,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 10:57:36,237 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 10:57:36,239 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 10:57:36,241 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 10:57:36,243 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 10:57:36,245 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 10:57:36,249 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 10:57:36,250 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 10:57:36,251 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 10:57:36,251 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 10:57:36,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 10:57:36,254 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 10:57:36,257 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 10:57:36,257 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 10:57:36,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 10:57:36,260 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 10:57:36,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 10:57:36,269 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 10:57:36,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 10:57:36,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 10:57:36,272 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 10:57:36,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 10:57:36,278 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 10:57:36,278 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 10:57:36,279 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 10:57:36,280 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 10:57:36,280 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 10:57:36,281 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 10:57:36,281 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 10:57:36,283 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 10:57:36,283 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 10:57:36,285 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 10:57:36,285 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 10:57:36,285 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 10:57:36,285 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 10:57:36,286 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 10:57:36,286 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 10:57:36,287 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 10:57:36,288 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 10:57:36,312 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 10:57:36,312 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 10:57:36,313 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 10:57:36,313 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 10:57:36,314 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 10:57:36,314 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 10:57:36,315 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 10:57:36,315 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 10:57:36,315 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 10:57:36,315 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 10:57:36,316 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 10:57:36,316 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 10:57:36,316 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 10:57:36,316 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 10:57:36,317 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 10:57:36,317 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 10:57:36,317 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 10:57:36,317 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 10:57:36,317 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 10:57:36,318 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 10:57:36,318 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 10:57:36,318 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 10:57:36,318 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 10:57:36,318 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 10:57:36,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 10:57:36,319 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 10:57:36,319 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 10:57:36,320 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 10:57:36,320 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 10:57:36,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 10:57:36,320 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 10:57:36,321 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 10:57:36,321 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 10:57:36,321 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 10:57:36,321 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1aca3c96522e618238f11f200c96e0ec490e756d4e04895bd2a51f9a4ff85af1 [2021-12-22 10:57:36,531 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 10:57:36,553 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 10:57:36,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 10:57:36,558 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 10:57:36,559 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 10:57:36,560 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c [2021-12-22 10:57:36,615 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62e853a85/161fc65d9e3f401c9430cc42f1725dd5/FLAG86ad44b19 [2021-12-22 10:57:36,946 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 10:57:36,947 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c [2021-12-22 10:57:36,952 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62e853a85/161fc65d9e3f401c9430cc42f1725dd5/FLAG86ad44b19 [2021-12-22 10:57:36,960 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62e853a85/161fc65d9e3f401c9430cc42f1725dd5 [2021-12-22 10:57:36,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 10:57:36,963 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 10:57:36,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 10:57:36,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 10:57:36,967 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 10:57:36,967 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:57:36" (1/1) ... [2021-12-22 10:57:36,968 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4da4c326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:57:36, skipping insertion in model container [2021-12-22 10:57:36,968 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:57:36" (1/1) ... [2021-12-22 10:57:36,973 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 10:57:36,984 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 10:57:37,123 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c[490,503] [2021-12-22 10:57:37,137 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:57:37,143 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 10:57:37,152 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c[490,503] [2021-12-22 10:57:37,160 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:57:37,169 INFO L208 MainTranslator]: Completed translation [2021-12-22 10:57:37,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:57:37 WrapperNode [2021-12-22 10:57:37,170 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 10:57:37,170 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 10:57:37,170 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 10:57:37,171 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 10:57:37,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:57:37" (1/1) ... [2021-12-22 10:57:37,180 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:57:37" (1/1) ... [2021-12-22 10:57:37,195 INFO L137 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2021-12-22 10:57:37,195 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 10:57:37,196 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 10:57:37,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 10:57:37,196 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 10:57:37,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:57:37" (1/1) ... [2021-12-22 10:57:37,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:57:37" (1/1) ... [2021-12-22 10:57:37,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:57:37" (1/1) ... [2021-12-22 10:57:37,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:57:37" (1/1) ... [2021-12-22 10:57:37,208 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:57:37" (1/1) ... [2021-12-22 10:57:37,211 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:57:37" (1/1) ... [2021-12-22 10:57:37,212 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:57:37" (1/1) ... [2021-12-22 10:57:37,214 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 10:57:37,214 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 10:57:37,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 10:57:37,215 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 10:57:37,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:57:37" (1/1) ... [2021-12-22 10:57:37,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 10:57:37,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:57:37,248 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 10:57:37,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 10:57:37,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 10:57:37,295 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-22 10:57:37,296 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-22 10:57:37,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 10:57:37,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 10:57:37,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 10:57:37,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-22 10:57:37,296 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-22 10:57:37,350 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 10:57:37,351 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 10:57:37,455 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 10:57:37,460 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 10:57:37,460 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-22 10:57:37,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:57:37 BoogieIcfgContainer [2021-12-22 10:57:37,462 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 10:57:37,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 10:57:37,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 10:57:37,477 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 10:57:37,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:57:36" (1/3) ... [2021-12-22 10:57:37,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58c6f2b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:57:37, skipping insertion in model container [2021-12-22 10:57:37,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:57:37" (2/3) ... [2021-12-22 10:57:37,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58c6f2b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:57:37, skipping insertion in model container [2021-12-22 10:57:37,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:57:37" (3/3) ... [2021-12-22 10:57:37,480 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound5.c [2021-12-22 10:57:37,483 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 10:57:37,483 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 10:57:37,520 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 10:57:37,526 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 [2021-12-22 10:57:37,527 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 10:57:37,541 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-22 10:57:37,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-22 10:57:37,545 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:57:37,545 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:57:37,546 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:57:37,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:57:37,550 INFO L85 PathProgramCache]: Analyzing trace with hash 872320404, now seen corresponding path program 1 times [2021-12-22 10:57:37,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:57:37,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473672167] [2021-12-22 10:57:37,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:57:37,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:57:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:57:37,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 10:57:37,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:57:37,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 10:57:37,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:57:37,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 10:57:37,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:57:37,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 10:57:37,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:57:37,753 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-22 10:57:37,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:57:37,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473672167] [2021-12-22 10:57:37,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473672167] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:57:37,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:57:37,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 10:57:37,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242441080] [2021-12-22 10:57:37,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:57:37,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 10:57:37,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:57:37,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 10:57:37,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 10:57:37,781 INFO L87 Difference]: Start difference. First operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-22 10:57:37,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:57:37,798 INFO L93 Difference]: Finished difference Result 67 states and 109 transitions. [2021-12-22 10:57:37,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 10:57:37,799 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-12-22 10:57:37,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:57:37,805 INFO L225 Difference]: With dead ends: 67 [2021-12-22 10:57:37,805 INFO L226 Difference]: Without dead ends: 31 [2021-12-22 10:57:37,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 10:57:37,811 INFO L933 BasicCegarLoop]: 44 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, 44 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:57:37,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:57:37,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-22 10:57:37,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-22 10:57:37,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-22 10:57:37,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2021-12-22 10:57:37,841 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 29 [2021-12-22 10:57:37,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:57:37,842 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2021-12-22 10:57:37,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-22 10:57:37,842 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2021-12-22 10:57:37,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 10:57:37,844 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:57:37,844 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:57:37,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 10:57:37,844 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:57:37,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:57:37,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1714405113, now seen corresponding path program 1 times [2021-12-22 10:57:37,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:57:37,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164407861] [2021-12-22 10:57:37,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:57:37,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:57:37,867 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 10:57:37,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1593128997] [2021-12-22 10:57:37,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:57:37,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:57:37,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:57:37,869 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:57:37,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 10:57:37,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:57:37,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 10:57:37,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:57:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-22 10:57:38,059 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 10:57:38,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:57:38,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164407861] [2021-12-22 10:57:38,060 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 10:57:38,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593128997] [2021-12-22 10:57:38,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593128997] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:57:38,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:57:38,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 10:57:38,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200219878] [2021-12-22 10:57:38,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:57:38,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 10:57:38,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:57:38,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 10:57:38,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 10:57:38,064 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-22 10:57:38,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:57:38,150 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2021-12-22 10:57:38,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 10:57:38,151 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2021-12-22 10:57:38,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:57:38,152 INFO L225 Difference]: With dead ends: 50 [2021-12-22 10:57:38,152 INFO L226 Difference]: Without dead ends: 43 [2021-12-22 10:57:38,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-22 10:57:38,154 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 31 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:57:38,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 135 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:57:38,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-22 10:57:38,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2021-12-22 10:57:38,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-22 10:57:38,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-12-22 10:57:38,179 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 30 [2021-12-22 10:57:38,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:57:38,180 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-12-22 10:57:38,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-22 10:57:38,181 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-12-22 10:57:38,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-22 10:57:38,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:57:38,182 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:57:38,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 10:57:38,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:57:38,404 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:57:38,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:57:38,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1825736765, now seen corresponding path program 1 times [2021-12-22 10:57:38,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:57:38,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593018642] [2021-12-22 10:57:38,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:57:38,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:57:38,425 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 10:57:38,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1385401539] [2021-12-22 10:57:38,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:57:38,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:57:38,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:57:38,432 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:57:38,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 10:57:38,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:57:38,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 10:57:38,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:57:38,583 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-22 10:57:38,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 10:57:38,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:57:38,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593018642] [2021-12-22 10:57:38,584 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 10:57:38,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385401539] [2021-12-22 10:57:38,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385401539] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:57:38,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:57:38,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 10:57:38,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292410694] [2021-12-22 10:57:38,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:57:38,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 10:57:38,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:57:38,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 10:57:38,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 10:57:38,587 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-22 10:57:38,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:57:38,620 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2021-12-22 10:57:38,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 10:57:38,621 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2021-12-22 10:57:38,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:57:38,622 INFO L225 Difference]: With dead ends: 49 [2021-12-22 10:57:38,622 INFO L226 Difference]: Without dead ends: 47 [2021-12-22 10:57:38,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 10:57:38,624 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:57:38,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 146 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:57:38,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-22 10:57:38,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-12-22 10:57:38,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-22 10:57:38,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2021-12-22 10:57:38,634 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 33 [2021-12-22 10:57:38,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:57:38,634 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2021-12-22 10:57:38,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-22 10:57:38,635 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2021-12-22 10:57:38,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-22 10:57:38,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:57:38,636 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:57:38,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 10:57:38,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-22 10:57:38,852 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:57:38,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:57:38,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1547103247, now seen corresponding path program 1 times [2021-12-22 10:57:38,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:57:38,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716370701] [2021-12-22 10:57:38,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:57:38,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:57:38,874 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 10:57:38,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1123086881] [2021-12-22 10:57:38,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:57:38,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:57:38,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:57:38,881 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:57:38,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 10:57:38,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:57:38,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 10:57:38,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:57:39,030 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-22 10:57:39,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:57:39,153 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-22 10:57:39,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:57:39,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716370701] [2021-12-22 10:57:39,154 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 10:57:39,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123086881] [2021-12-22 10:57:39,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123086881] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:57:39,155 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 10:57:39,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-12-22 10:57:39,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385336033] [2021-12-22 10:57:39,156 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 10:57:39,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 10:57:39,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:57:39,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 10:57:39,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-22 10:57:39,158 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-22 10:57:39,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:57:39,321 INFO L93 Difference]: Finished difference Result 99 states and 139 transitions. [2021-12-22 10:57:39,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 10:57:39,322 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-12-22 10:57:39,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:57:39,324 INFO L225 Difference]: With dead ends: 99 [2021-12-22 10:57:39,324 INFO L226 Difference]: Without dead ends: 92 [2021-12-22 10:57:39,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-12-22 10:57:39,326 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 60 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:57:39,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 224 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:57:39,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-22 10:57:39,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2021-12-22 10:57:39,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-22 10:57:39,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2021-12-22 10:57:39,339 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 35 [2021-12-22 10:57:39,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:57:39,340 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2021-12-22 10:57:39,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-22 10:57:39,340 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2021-12-22 10:57:39,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-22 10:57:39,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:57:39,341 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:57:39,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 10:57:39,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:57:39,564 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:57:39,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:57:39,565 INFO L85 PathProgramCache]: Analyzing trace with hash -720434099, now seen corresponding path program 1 times [2021-12-22 10:57:39,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:57:39,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840178088] [2021-12-22 10:57:39,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:57:39,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:57:39,588 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 10:57:39,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [522709360] [2021-12-22 10:57:39,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:57:39,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:57:39,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:57:39,592 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:57:39,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 10:57:39,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:57:39,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 10:57:39,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:57:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-22 10:57:39,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 10:57:39,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:57:39,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840178088] [2021-12-22 10:57:39,727 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 10:57:39,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522709360] [2021-12-22 10:57:39,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522709360] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:57:39,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:57:39,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 10:57:39,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132675533] [2021-12-22 10:57:39,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:57:39,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 10:57:39,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:57:39,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 10:57:39,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 10:57:39,730 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 10:57:39,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:57:39,776 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2021-12-22 10:57:39,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 10:57:39,776 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2021-12-22 10:57:39,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:57:39,777 INFO L225 Difference]: With dead ends: 75 [2021-12-22 10:57:39,779 INFO L226 Difference]: Without dead ends: 73 [2021-12-22 10:57:39,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 10:57:39,780 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 9 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:57:39,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 142 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:57:39,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-22 10:57:39,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-12-22 10:57:39,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-22 10:57:39,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2021-12-22 10:57:39,797 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 38 [2021-12-22 10:57:39,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:57:39,798 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2021-12-22 10:57:39,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 10:57:39,798 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2021-12-22 10:57:39,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-22 10:57:39,799 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:57:39,799 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:57:39,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 10:57:40,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:57:40,015 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:57:40,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:57:40,016 INFO L85 PathProgramCache]: Analyzing trace with hash -376152117, now seen corresponding path program 1 times [2021-12-22 10:57:40,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:57:40,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126522199] [2021-12-22 10:57:40,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:57:40,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:57:40,028 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 10:57:40,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1831174306] [2021-12-22 10:57:40,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:57:40,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:57:40,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:57:40,030 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:57:40,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 10:57:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:57:40,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-22 10:57:40,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:57:40,228 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-22 10:57:40,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:57:40,415 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-22 10:57:40,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:57:40,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126522199] [2021-12-22 10:57:40,416 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 10:57:40,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831174306] [2021-12-22 10:57:40,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831174306] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:57:40,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 10:57:40,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-12-22 10:57:40,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144869294] [2021-12-22 10:57:40,417 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 10:57:40,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 10:57:40,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:57:40,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 10:57:40,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-22 10:57:40,419 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-22 10:57:40,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:57:40,479 INFO L93 Difference]: Finished difference Result 95 states and 125 transitions. [2021-12-22 10:57:40,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 10:57:40,480 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2021-12-22 10:57:40,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:57:40,482 INFO L225 Difference]: With dead ends: 95 [2021-12-22 10:57:40,482 INFO L226 Difference]: Without dead ends: 93 [2021-12-22 10:57:40,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-22 10:57:40,483 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 13 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:57:40,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 262 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 31 Unchecked, 0.0s Time] [2021-12-22 10:57:40,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-22 10:57:40,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2021-12-22 10:57:40,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 63 states have internal predecessors, (77), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-22 10:57:40,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 118 transitions. [2021-12-22 10:57:40,496 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 118 transitions. Word has length 38 [2021-12-22 10:57:40,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:57:40,496 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 118 transitions. [2021-12-22 10:57:40,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-22 10:57:40,497 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 118 transitions. [2021-12-22 10:57:40,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-22 10:57:40,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:57:40,498 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:57:40,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-22 10:57:40,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:57:40,711 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:57:40,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:57:40,712 INFO L85 PathProgramCache]: Analyzing trace with hash 279172547, now seen corresponding path program 1 times [2021-12-22 10:57:40,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:57:40,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498164665] [2021-12-22 10:57:40,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:57:40,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:57:40,724 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 10:57:40,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [24808343] [2021-12-22 10:57:40,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:57:40,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:57:40,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:57:40,727 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:57:40,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 10:57:40,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:57:40,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 10:57:40,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:57:40,886 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-22 10:57:40,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 10:57:40,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:57:40,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498164665] [2021-12-22 10:57:40,887 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 10:57:40,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24808343] [2021-12-22 10:57:40,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24808343] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:57:40,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:57:40,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 10:57:40,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372040142] [2021-12-22 10:57:40,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:57:40,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 10:57:40,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:57:40,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 10:57:40,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 10:57:40,890 INFO L87 Difference]: Start difference. First operand 89 states and 118 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-22 10:57:40,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:57:40,936 INFO L93 Difference]: Finished difference Result 126 states and 175 transitions. [2021-12-22 10:57:40,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 10:57:40,937 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2021-12-22 10:57:40,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:57:40,939 INFO L225 Difference]: With dead ends: 126 [2021-12-22 10:57:40,939 INFO L226 Difference]: Without dead ends: 124 [2021-12-22 10:57:40,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 10:57:40,940 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:57:40,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 135 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:57:40,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-22 10:57:40,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2021-12-22 10:57:40,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 76 states have internal predecessors, (95), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-12-22 10:57:40,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 168 transitions. [2021-12-22 10:57:40,978 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 168 transitions. Word has length 43 [2021-12-22 10:57:40,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:57:40,978 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 168 transitions. [2021-12-22 10:57:40,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-22 10:57:40,978 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 168 transitions. [2021-12-22 10:57:40,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-22 10:57:40,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:57:40,979 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:57:41,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 10:57:41,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:57:41,188 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:57:41,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:57:41,188 INFO L85 PathProgramCache]: Analyzing trace with hash -2141198011, now seen corresponding path program 1 times [2021-12-22 10:57:41,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:57:41,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845473757] [2021-12-22 10:57:41,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:57:41,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:57:41,199 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 10:57:41,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1613586746] [2021-12-22 10:57:41,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:57:41,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:57:41,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:57:41,206 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:57:41,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 10:57:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:57:41,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-22 10:57:41,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:57:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-22 10:57:41,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:57:41,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:57:41,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845473757] [2021-12-22 10:57:41,506 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 10:57:41,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613586746] [2021-12-22 10:57:41,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613586746] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:57:41,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-22 10:57:41,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-12-22 10:57:41,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455960676] [2021-12-22 10:57:41,507 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-22 10:57:41,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 10:57:41,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:57:41,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 10:57:41,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-22 10:57:41,509 INFO L87 Difference]: Start difference. First operand 119 states and 168 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 10:57:41,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:57:41,626 INFO L93 Difference]: Finished difference Result 133 states and 180 transitions. [2021-12-22 10:57:41,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 10:57:41,626 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2021-12-22 10:57:41,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:57:41,628 INFO L225 Difference]: With dead ends: 133 [2021-12-22 10:57:41,629 INFO L226 Difference]: Without dead ends: 131 [2021-12-22 10:57:41,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-22 10:57:41,630 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 27 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:57:41,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 242 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:57:41,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-22 10:57:41,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2021-12-22 10:57:41,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 82 states have internal predecessors, (101), 37 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-12-22 10:57:41,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 174 transitions. [2021-12-22 10:57:41,654 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 174 transitions. Word has length 43 [2021-12-22 10:57:41,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:57:41,655 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 174 transitions. [2021-12-22 10:57:41,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 10:57:41,655 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 174 transitions. [2021-12-22 10:57:41,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-22 10:57:41,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:57:41,659 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:57:41,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 10:57:41,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:57:41,872 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:57:41,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:57:41,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1796916029, now seen corresponding path program 2 times [2021-12-22 10:57:41,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:57:41,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095932381] [2021-12-22 10:57:41,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:57:41,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:57:41,883 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 10:57:41,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2033078139] [2021-12-22 10:57:41,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 10:57:41,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:57:41,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:57:41,885 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:57:41,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 10:57:41,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 10:57:41,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:57:41,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 10:57:41,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:57:42,000 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-22 10:57:42,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 10:57:42,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:57:42,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095932381] [2021-12-22 10:57:42,001 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 10:57:42,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033078139] [2021-12-22 10:57:42,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033078139] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:57:42,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:57:42,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 10:57:42,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815252937] [2021-12-22 10:57:42,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:57:42,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 10:57:42,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:57:42,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 10:57:42,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 10:57:42,004 INFO L87 Difference]: Start difference. First operand 127 states and 174 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-22 10:57:42,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:57:42,076 INFO L93 Difference]: Finished difference Result 166 states and 226 transitions. [2021-12-22 10:57:42,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 10:57:42,077 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2021-12-22 10:57:42,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:57:42,078 INFO L225 Difference]: With dead ends: 166 [2021-12-22 10:57:42,078 INFO L226 Difference]: Without dead ends: 110 [2021-12-22 10:57:42,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-22 10:57:42,079 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 18 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:57:42,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 164 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:57:42,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-22 10:57:42,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2021-12-22 10:57:42,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 64 states have (on average 1.1875) internal successors, (76), 65 states have internal predecessors, (76), 29 states have call successors, (29), 8 states have call predecessors, (29), 8 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-12-22 10:57:42,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 133 transitions. [2021-12-22 10:57:42,089 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 133 transitions. Word has length 43 [2021-12-22 10:57:42,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:57:42,090 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 133 transitions. [2021-12-22 10:57:42,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-22 10:57:42,090 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 133 transitions. [2021-12-22 10:57:42,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-22 10:57:42,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:57:42,091 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:57:42,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 10:57:42,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-22 10:57:42,312 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:57:42,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:57:42,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1189241395, now seen corresponding path program 1 times [2021-12-22 10:57:42,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:57:42,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628389041] [2021-12-22 10:57:42,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:57:42,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:57:42,322 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 10:57:42,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1506836726] [2021-12-22 10:57:42,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:57:42,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:57:42,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:57:42,324 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:57:42,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 10:57:42,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:57:42,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 10:57:42,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:57:42,461 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-22 10:57:42,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 10:57:42,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:57:42,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628389041] [2021-12-22 10:57:42,461 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 10:57:42,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506836726] [2021-12-22 10:57:42,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506836726] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:57:42,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:57:42,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 10:57:42,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319728609] [2021-12-22 10:57:42,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:57:42,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 10:57:42,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:57:42,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 10:57:42,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 10:57:42,464 INFO L87 Difference]: Start difference. First operand 102 states and 133 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 10:57:42,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:57:42,514 INFO L93 Difference]: Finished difference Result 154 states and 217 transitions. [2021-12-22 10:57:42,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 10:57:42,514 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2021-12-22 10:57:42,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:57:42,516 INFO L225 Difference]: With dead ends: 154 [2021-12-22 10:57:42,516 INFO L226 Difference]: Without dead ends: 152 [2021-12-22 10:57:42,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 10:57:42,517 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:57:42,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 146 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:57:42,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-22 10:57:42,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 136. [2021-12-22 10:57:42,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 80 states have internal predecessors, (85), 53 states have call successors, (53), 9 states have call predecessors, (53), 9 states have return successors, (52), 46 states have call predecessors, (52), 52 states have call successors, (52) [2021-12-22 10:57:42,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 190 transitions. [2021-12-22 10:57:42,535 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 190 transitions. Word has length 48 [2021-12-22 10:57:42,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:57:42,535 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 190 transitions. [2021-12-22 10:57:42,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 10:57:42,535 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 190 transitions. [2021-12-22 10:57:42,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-22 10:57:42,536 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:57:42,537 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:57:42,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 10:57:42,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-22 10:57:42,758 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:57:42,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:57:42,759 INFO L85 PathProgramCache]: Analyzing trace with hash -828341661, now seen corresponding path program 1 times [2021-12-22 10:57:42,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:57:42,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806379578] [2021-12-22 10:57:42,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:57:42,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:57:42,769 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 10:57:42,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010056019] [2021-12-22 10:57:42,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:57:42,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:57:42,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:57:42,770 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:57:42,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 10:57:42,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:57:42,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-22 10:57:42,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:57:43,378 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-22 10:57:43,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:57:49,436 WARN L860 $PredicateComparison]: unable to prove that (or (not (= (+ |c_ULTIMATE.start_main_~c~0#1| (* (- 1) |c_ULTIMATE.start_main_~v~0#1|)) 0)) (let ((.cse11 (+ |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~k~0#1|))) (let ((.cse8 (= |c_ULTIMATE.start_main_~p~0#1| 0)) (.cse4 (+ (* (- 1) .cse11 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~p~0#1|)) (.cse6 (* |c_ULTIMATE.start_main_~y~0#1| (+ |c_ULTIMATE.start_main_~r~0#1| (* (* |c_ULTIMATE.start_main_~s~0#1| .cse11) (- 1))))) (.cse7 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse0 (+ |c_ULTIMATE.start_main_~a~0#1| (* (- 1) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)))) (and (or (not (= .cse0 0)) (let ((.cse3 (= 0 |c_ULTIMATE.start_main_~q~0#1|)) (.cse1 (+ |c_ULTIMATE.start_main_~b~0#1| (* (- 1) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)))) (and (or (not (= .cse1 0)) (forall ((|ULTIMATE.start_main_~x~0#1| Int)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (let ((.cse2 (+ |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~k~0#1|))) (+ (* (+ (* (- 1) .cse2 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~p~0#1|) |ULTIMATE.start_main_~x~0#1|) |c_ULTIMATE.start_main_~b~0#1| (* |c_ULTIMATE.start_main_~y~0#1| (+ |c_ULTIMATE.start_main_~r~0#1| (* (* |c_ULTIMATE.start_main_~s~0#1| .cse2) (- 1)))))))) (not .cse3)) (or .cse3 (not (= (mod .cse1 |c_ULTIMATE.start_main_~q~0#1|) 0)) (let ((.cse5 (div .cse1 |c_ULTIMATE.start_main_~q~0#1|))) (= (+ (* .cse4 .cse5) |c_ULTIMATE.start_main_~b~0#1| .cse6) (+ .cse7 (* .cse5 |c_ULTIMATE.start_main_~q~0#1|))))))) (not .cse8)) (let ((.cse10 (div .cse0 |c_ULTIMATE.start_main_~p~0#1|))) (let ((.cse9 (+ .cse7 (* .cse10 |c_ULTIMATE.start_main_~q~0#1|)))) (or (not (= .cse9 |c_ULTIMATE.start_main_~b~0#1|)) .cse8 (not (= (mod .cse0 |c_ULTIMATE.start_main_~p~0#1|) 0)) (= .cse9 (+ (* .cse4 .cse10) |c_ULTIMATE.start_main_~b~0#1| .cse6))))))))) is different from true [2021-12-22 10:57:49,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:57:49,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806379578] [2021-12-22 10:57:49,438 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 10:57:49,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010056019] [2021-12-22 10:57:49,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010056019] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:57:49,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-22 10:57:49,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-12-22 10:57:49,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349465061] [2021-12-22 10:57:49,439 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-22 10:57:49,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 10:57:49,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:57:49,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 10:57:49,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=290, Unknown=1, NotChecked=34, Total=380 [2021-12-22 10:57:49,440 INFO L87 Difference]: Start difference. First operand 136 states and 190 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 10:57:49,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:57:49,898 INFO L93 Difference]: Finished difference Result 196 states and 279 transitions. [2021-12-22 10:57:49,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 10:57:49,899 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 60 [2021-12-22 10:57:49,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:57:49,900 INFO L225 Difference]: With dead ends: 196 [2021-12-22 10:57:49,900 INFO L226 Difference]: Without dead ends: 193 [2021-12-22 10:57:49,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=84, Invalid=425, Unknown=1, NotChecked=42, Total=552 [2021-12-22 10:57:49,901 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 46 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 10:57:49,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 301 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 10:57:49,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-12-22 10:57:49,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 178. [2021-12-22 10:57:49,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 97 states have (on average 1.175257731958763) internal successors, (114), 105 states have internal predecessors, (114), 69 states have call successors, (69), 11 states have call predecessors, (69), 11 states have return successors, (68), 61 states have call predecessors, (68), 68 states have call successors, (68) [2021-12-22 10:57:49,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 251 transitions. [2021-12-22 10:57:49,926 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 251 transitions. Word has length 60 [2021-12-22 10:57:49,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:57:49,927 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 251 transitions. [2021-12-22 10:57:49,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 10:57:49,927 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 251 transitions. [2021-12-22 10:57:49,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 10:57:49,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:57:49,928 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:57:49,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 10:57:50,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-22 10:57:50,143 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:57:50,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:57:50,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1649355429, now seen corresponding path program 2 times [2021-12-22 10:57:50,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:57:50,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655781517] [2021-12-22 10:57:50,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:57:50,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:57:50,152 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 10:57:50,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1993043774] [2021-12-22 10:57:50,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 10:57:50,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:57:50,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:57:50,154 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:57:50,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 10:57:50,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 10:57:50,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:57:50,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 10:57:50,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:57:50,364 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-22 10:57:50,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:57:50,500 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-22 10:57:50,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:57:50,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655781517] [2021-12-22 10:57:50,501 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 10:57:50,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993043774] [2021-12-22 10:57:50,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993043774] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:57:50,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 10:57:50,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-12-22 10:57:50,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602765493] [2021-12-22 10:57:50,502 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 10:57:50,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 10:57:50,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:57:50,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 10:57:50,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 10:57:50,503 INFO L87 Difference]: Start difference. First operand 178 states and 251 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 10:57:50,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:57:50,807 INFO L93 Difference]: Finished difference Result 273 states and 400 transitions. [2021-12-22 10:57:50,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 10:57:50,807 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 65 [2021-12-22 10:57:50,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:57:50,812 INFO L225 Difference]: With dead ends: 273 [2021-12-22 10:57:50,812 INFO L226 Difference]: Without dead ends: 266 [2021-12-22 10:57:50,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-12-22 10:57:50,813 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 48 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 10:57:50,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 364 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 10:57:50,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-22 10:57:50,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 193. [2021-12-22 10:57:50,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 112 states have (on average 1.2053571428571428) internal successors, (135), 117 states have internal predecessors, (135), 69 states have call successors, (69), 11 states have call predecessors, (69), 11 states have return successors, (68), 64 states have call predecessors, (68), 68 states have call successors, (68) [2021-12-22 10:57:50,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 272 transitions. [2021-12-22 10:57:50,848 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 272 transitions. Word has length 65 [2021-12-22 10:57:50,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:57:50,849 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 272 transitions. [2021-12-22 10:57:50,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 10:57:50,850 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 272 transitions. [2021-12-22 10:57:50,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 10:57:50,851 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:57:50,851 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:57:50,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-22 10:57:51,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-22 10:57:51,074 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:57:51,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:57:51,075 INFO L85 PathProgramCache]: Analyzing trace with hash -492391883, now seen corresponding path program 1 times [2021-12-22 10:57:51,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:57:51,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117951051] [2021-12-22 10:57:51,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:57:51,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:57:51,084 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 10:57:51,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1056550577] [2021-12-22 10:57:51,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:57:51,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:57:51,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:57:51,086 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:57:51,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 10:57:51,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:57:51,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 10:57:51,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:57:51,241 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-22 10:57:51,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 10:57:51,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:57:51,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117951051] [2021-12-22 10:57:51,242 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 10:57:51,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056550577] [2021-12-22 10:57:51,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056550577] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:57:51,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:57:51,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 10:57:51,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815163602] [2021-12-22 10:57:51,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:57:51,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 10:57:51,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:57:51,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 10:57:51,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 10:57:51,244 INFO L87 Difference]: Start difference. First operand 193 states and 272 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-22 10:57:51,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:57:51,303 INFO L93 Difference]: Finished difference Result 324 states and 455 transitions. [2021-12-22 10:57:51,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 10:57:51,304 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 68 [2021-12-22 10:57:51,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:57:51,305 INFO L225 Difference]: With dead ends: 324 [2021-12-22 10:57:51,305 INFO L226 Difference]: Without dead ends: 210 [2021-12-22 10:57:51,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-22 10:57:51,309 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:57:51,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 132 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:57:51,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-12-22 10:57:51,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 194. [2021-12-22 10:57:51,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 113 states have (on average 1.2035398230088497) internal successors, (136), 114 states have internal predecessors, (136), 69 states have call successors, (69), 11 states have call predecessors, (69), 11 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2021-12-22 10:57:51,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 273 transitions. [2021-12-22 10:57:51,334 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 273 transitions. Word has length 68 [2021-12-22 10:57:51,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:57:51,334 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 273 transitions. [2021-12-22 10:57:51,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-22 10:57:51,335 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 273 transitions. [2021-12-22 10:57:51,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-22 10:57:51,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:57:51,336 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:57:51,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-22 10:57:51,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-22 10:57:51,552 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:57:51,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:57:51,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1607561902, now seen corresponding path program 1 times [2021-12-22 10:57:51,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:57:51,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976461563] [2021-12-22 10:57:51,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:57:51,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:57:51,571 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 10:57:51,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [584270002] [2021-12-22 10:57:51,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:57:51,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:57:51,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:57:51,573 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:57:51,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-22 10:57:51,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:57:51,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-22 10:57:51,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:57:52,205 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 34 proven. 15 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-22 10:57:52,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:57:52,512 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-22 10:57:52,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:57:52,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976461563] [2021-12-22 10:57:52,512 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 10:57:52,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584270002] [2021-12-22 10:57:52,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584270002] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:57:52,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 10:57:52,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 19 [2021-12-22 10:57:52,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699171058] [2021-12-22 10:57:52,513 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 10:57:52,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-22 10:57:52,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:57:52,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-22 10:57:52,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-12-22 10:57:52,514 INFO L87 Difference]: Start difference. First operand 194 states and 273 transitions. Second operand has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2021-12-22 10:57:53,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:57:53,158 INFO L93 Difference]: Finished difference Result 237 states and 336 transitions. [2021-12-22 10:57:53,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 10:57:53,158 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) Word has length 70 [2021-12-22 10:57:53,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:57:53,160 INFO L225 Difference]: With dead ends: 237 [2021-12-22 10:57:53,160 INFO L226 Difference]: Without dead ends: 235 [2021-12-22 10:57:53,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2021-12-22 10:57:53,161 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 78 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 10:57:53,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 215 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 10:57:53,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-12-22 10:57:53,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 198. [2021-12-22 10:57:53,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 116 states have (on average 1.1982758620689655) internal successors, (139), 117 states have internal predecessors, (139), 69 states have call successors, (69), 12 states have call predecessors, (69), 12 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2021-12-22 10:57:53,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 276 transitions. [2021-12-22 10:57:53,186 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 276 transitions. Word has length 70 [2021-12-22 10:57:53,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:57:53,187 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 276 transitions. [2021-12-22 10:57:53,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2021-12-22 10:57:53,187 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 276 transitions. [2021-12-22 10:57:53,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 10:57:53,188 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:57:53,188 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:57:53,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-22 10:57:53,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-22 10:57:53,403 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:57:53,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:57:53,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1439093215, now seen corresponding path program 1 times [2021-12-22 10:57:53,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:57:53,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190712500] [2021-12-22 10:57:53,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:57:53,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:57:53,412 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 10:57:53,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1533994460] [2021-12-22 10:57:53,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:57:53,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:57:53,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:57:53,414 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:57:53,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-22 10:57:53,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:57:53,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-22 10:57:53,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:57:53,821 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-22 10:57:53,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:57:54,072 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-22 10:57:54,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:57:54,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190712500] [2021-12-22 10:57:54,073 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 10:57:54,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533994460] [2021-12-22 10:57:54,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533994460] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:57:54,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 10:57:54,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-12-22 10:57:54,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772106719] [2021-12-22 10:57:54,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 10:57:54,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 10:57:54,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:57:54,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 10:57:54,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-12-22 10:57:54,076 INFO L87 Difference]: Start difference. First operand 198 states and 276 transitions. Second operand has 15 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-22 10:57:54,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:57:54,642 INFO L93 Difference]: Finished difference Result 268 states and 365 transitions. [2021-12-22 10:57:54,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 10:57:54,642 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) Word has length 68 [2021-12-22 10:57:54,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:57:54,645 INFO L225 Difference]: With dead ends: 268 [2021-12-22 10:57:54,645 INFO L226 Difference]: Without dead ends: 266 [2021-12-22 10:57:54,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 123 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-12-22 10:57:54,648 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 111 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 10:57:54,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 266 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 10:57:54,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-22 10:57:54,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 210. [2021-12-22 10:57:54,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 125 states have (on average 1.184) internal successors, (148), 126 states have internal predecessors, (148), 69 states have call successors, (69), 15 states have call predecessors, (69), 15 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2021-12-22 10:57:54,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 285 transitions. [2021-12-22 10:57:54,678 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 285 transitions. Word has length 68 [2021-12-22 10:57:54,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:57:54,678 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 285 transitions. [2021-12-22 10:57:54,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-22 10:57:54,679 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 285 transitions. [2021-12-22 10:57:54,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-22 10:57:54,680 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:57:54,680 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:57:54,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-22 10:57:54,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:57:54,895 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:57:54,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:57:54,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1622368081, now seen corresponding path program 2 times [2021-12-22 10:57:54,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:57:54,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574507767] [2021-12-22 10:57:54,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:57:54,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:57:54,904 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 10:57:54,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1871510079] [2021-12-22 10:57:54,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 10:57:54,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:57:54,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:57:54,905 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:57:54,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-22 10:57:54,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 10:57:54,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:57:54,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-22 10:57:54,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:57:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-22 10:57:55,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:57:56,903 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-22 10:57:56,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:57:56,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574507767] [2021-12-22 10:57:56,904 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 10:57:56,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871510079] [2021-12-22 10:57:56,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871510079] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:57:56,904 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 10:57:56,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 25 [2021-12-22 10:57:56,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772323466] [2021-12-22 10:57:56,904 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 10:57:56,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-22 10:57:56,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:57:56,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-22 10:57:56,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-12-22 10:57:56,906 INFO L87 Difference]: Start difference. First operand 210 states and 285 transitions. Second operand has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 20 states have internal predecessors, (58), 9 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) [2021-12-22 10:58:11,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:58:11,435 INFO L93 Difference]: Finished difference Result 297 states and 390 transitions. [2021-12-22 10:58:11,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-22 10:58:11,436 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 20 states have internal predecessors, (58), 9 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) Word has length 73 [2021-12-22 10:58:11,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:58:11,438 INFO L225 Difference]: With dead ends: 297 [2021-12-22 10:58:11,438 INFO L226 Difference]: Without dead ends: 295 [2021-12-22 10:58:11,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=390, Invalid=1772, Unknown=0, NotChecked=0, Total=2162 [2021-12-22 10:58:11,439 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 100 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:58:11,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 356 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2021-12-22 10:58:11,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-12-22 10:58:11,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 245. [2021-12-22 10:58:11,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 152 states have (on average 1.1578947368421053) internal successors, (176), 154 states have internal predecessors, (176), 71 states have call successors, (71), 21 states have call predecessors, (71), 21 states have return successors, (70), 69 states have call predecessors, (70), 70 states have call successors, (70) [2021-12-22 10:58:11,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 317 transitions. [2021-12-22 10:58:11,484 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 317 transitions. Word has length 73 [2021-12-22 10:58:11,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:58:11,484 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 317 transitions. [2021-12-22 10:58:11,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 20 states have internal predecessors, (58), 9 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) [2021-12-22 10:58:11,485 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 317 transitions. [2021-12-22 10:58:11,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-22 10:58:11,486 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:58:11,486 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:58:11,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-22 10:58:11,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-22 10:58:11,706 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:58:11,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:58:11,707 INFO L85 PathProgramCache]: Analyzing trace with hash 593432004, now seen corresponding path program 1 times [2021-12-22 10:58:11,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:58:11,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33515707] [2021-12-22 10:58:11,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:58:11,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:58:11,719 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 10:58:11,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1218879568] [2021-12-22 10:58:11,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:58:11,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:58:11,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:58:11,722 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:58:11,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-22 10:58:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:58:11,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-22 10:58:11,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:58:12,413 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-12-22 10:58:12,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:58:14,025 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-12-22 10:58:14,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:58:14,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33515707] [2021-12-22 10:58:14,025 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 10:58:14,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218879568] [2021-12-22 10:58:14,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218879568] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:58:14,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 10:58:14,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-12-22 10:58:14,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31295071] [2021-12-22 10:58:14,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 10:58:14,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-22 10:58:14,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:58:14,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-22 10:58:14,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-12-22 10:58:14,027 INFO L87 Difference]: Start difference. First operand 245 states and 317 transitions. Second operand has 23 states, 21 states have (on average 2.238095238095238) internal successors, (47), 22 states have internal predecessors, (47), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-22 10:58:19,291 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-22 10:58:29,894 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.36s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-22 10:58:37,972 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-22 10:58:39,944 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-22 10:58:40,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:58:40,140 INFO L93 Difference]: Finished difference Result 447 states and 609 transitions. [2021-12-22 10:58:40,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-22 10:58:40,140 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.238095238095238) internal successors, (47), 22 states have internal predecessors, (47), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 82 [2021-12-22 10:58:40,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:58:40,143 INFO L225 Difference]: With dead ends: 447 [2021-12-22 10:58:40,144 INFO L226 Difference]: Without dead ends: 438 [2021-12-22 10:58:40,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=678, Invalid=3354, Unknown=0, NotChecked=0, Total=4032 [2021-12-22 10:58:40,145 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 183 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 1414 mSolverCounterSat, 440 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 1856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 1414 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.9s IncrementalHoareTripleChecker+Time [2021-12-22 10:58:40,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 586 Invalid, 1856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 1414 Invalid, 2 Unknown, 0 Unchecked, 18.9s Time] [2021-12-22 10:58:40,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-12-22 10:58:40,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 370. [2021-12-22 10:58:40,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 230 states have (on average 1.173913043478261) internal successors, (270), 233 states have internal predecessors, (270), 113 states have call successors, (113), 26 states have call predecessors, (113), 26 states have return successors, (112), 110 states have call predecessors, (112), 112 states have call successors, (112) [2021-12-22 10:58:40,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 495 transitions. [2021-12-22 10:58:40,249 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 495 transitions. Word has length 82 [2021-12-22 10:58:40,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:58:40,249 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 495 transitions. [2021-12-22 10:58:40,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.238095238095238) internal successors, (47), 22 states have internal predecessors, (47), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-22 10:58:40,249 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 495 transitions. [2021-12-22 10:58:40,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-22 10:58:40,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:58:40,251 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:58:40,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-22 10:58:40,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-22 10:58:40,467 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:58:40,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:58:40,467 INFO L85 PathProgramCache]: Analyzing trace with hash 160585404, now seen corresponding path program 2 times [2021-12-22 10:58:40,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:58:40,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536764489] [2021-12-22 10:58:40,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:58:40,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:58:40,474 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 10:58:40,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326781880] [2021-12-22 10:58:40,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 10:58:40,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:58:40,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:58:40,480 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:58:40,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-22 10:58:40,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 10:58:40,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:58:40,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 85 conjunts are in the unsatisfiable core [2021-12-22 10:58:40,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:58:41,308 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-22 10:58:41,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:58:43,396 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-22 10:58:43,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:58:43,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536764489] [2021-12-22 10:58:43,397 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 10:58:43,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326781880] [2021-12-22 10:58:43,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326781880] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:58:43,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 10:58:43,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-12-22 10:58:43,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450435101] [2021-12-22 10:58:43,397 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 10:58:43,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-22 10:58:43,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:58:43,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-22 10:58:43,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-12-22 10:58:43,398 INFO L87 Difference]: Start difference. First operand 370 states and 495 transitions. Second operand has 27 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20)