./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/dijkstra-u_unwindbound50.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 2616f51a0d79e0bd682803708141b0dc94462ecdbaee78ea9cc6b43878e4310d --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 15:47:24,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 15:47:24,139 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 15:47:24,180 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 15:47:24,181 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 15:47:24,182 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 15:47:24,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 15:47:24,184 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 15:47:24,186 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 15:47:24,186 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 15:47:24,187 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 15:47:24,188 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 15:47:24,189 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 15:47:24,189 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 15:47:24,190 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 15:47:24,191 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 15:47:24,192 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 15:47:24,193 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 15:47:24,194 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 15:47:24,195 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 15:47:24,196 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 15:47:24,197 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 15:47:24,198 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 15:47:24,199 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 15:47:24,200 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 15:47:24,208 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 15:47:24,211 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 15:47:24,212 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 15:47:24,212 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 15:47:24,213 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 15:47:24,213 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 15:47:24,214 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 15:47:24,215 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 15:47:24,216 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 15:47:24,217 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 15:47:24,218 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 15:47:24,219 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 15:47:24,219 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 15:47:24,220 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 15:47:24,220 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 15:47:24,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 15:47:24,221 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 15:47:24,223 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 15:47:24,250 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 15:47:24,251 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 15:47:24,251 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 15:47:24,251 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 15:47:24,252 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 15:47:24,252 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 15:47:24,253 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 15:47:24,253 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 15:47:24,253 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 15:47:24,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 15:47:24,254 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 15:47:24,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 15:47:24,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 15:47:24,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 15:47:24,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 15:47:24,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 15:47:24,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 15:47:24,255 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 15:47:24,255 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 15:47:24,256 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 15:47:24,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 15:47:24,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 15:47:24,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 15:47:24,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 15:47:24,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 15:47:24,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 15:47:24,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 15:47:24,257 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 15:47:24,257 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 15:47:24,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 15:47:24,258 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 15:47:24,258 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 15:47:24,258 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 15:47:24,258 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2616f51a0d79e0bd682803708141b0dc94462ecdbaee78ea9cc6b43878e4310d [2022-07-22 15:47:24,480 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 15:47:24,503 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 15:47:24,506 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 15:47:24,507 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 15:47:24,507 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 15:47:24,509 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c [2022-07-22 15:47:24,566 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e17fd2c61/a764f15d29a24da1aed52cff61f20925/FLAGe316c3c8a [2022-07-22 15:47:24,959 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 15:47:24,963 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c [2022-07-22 15:47:24,973 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e17fd2c61/a764f15d29a24da1aed52cff61f20925/FLAGe316c3c8a [2022-07-22 15:47:25,360 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e17fd2c61/a764f15d29a24da1aed52cff61f20925 [2022-07-22 15:47:25,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 15:47:25,363 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 15:47:25,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 15:47:25,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 15:47:25,369 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 15:47:25,369 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 03:47:25" (1/1) ... [2022-07-22 15:47:25,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f09e8c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:47:25, skipping insertion in model container [2022-07-22 15:47:25,371 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 03:47:25" (1/1) ... [2022-07-22 15:47:25,377 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 15:47:25,392 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 15:47:25,573 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/dijkstra-u_unwindbound50.c[525,538] [2022-07-22 15:47:25,596 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 15:47:25,602 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 15:47:25,612 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/dijkstra-u_unwindbound50.c[525,538] [2022-07-22 15:47:25,624 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 15:47:25,634 INFO L208 MainTranslator]: Completed translation [2022-07-22 15:47:25,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:47:25 WrapperNode [2022-07-22 15:47:25,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 15:47:25,636 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 15:47:25,636 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 15:47:25,636 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 15:47:25,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:47:25" (1/1) ... [2022-07-22 15:47:25,648 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:47:25" (1/1) ... [2022-07-22 15:47:25,664 INFO L137 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2022-07-22 15:47:25,665 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 15:47:25,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 15:47:25,666 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 15:47:25,666 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 15:47:25,672 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:47:25" (1/1) ... [2022-07-22 15:47:25,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:47:25" (1/1) ... [2022-07-22 15:47:25,674 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:47:25" (1/1) ... [2022-07-22 15:47:25,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:47:25" (1/1) ... [2022-07-22 15:47:25,677 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:47:25" (1/1) ... [2022-07-22 15:47:25,680 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:47:25" (1/1) ... [2022-07-22 15:47:25,681 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:47:25" (1/1) ... [2022-07-22 15:47:25,683 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 15:47:25,684 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 15:47:25,684 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 15:47:25,684 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 15:47:25,685 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:47:25" (1/1) ... [2022-07-22 15:47:25,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 15:47:25,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:47:25,708 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) [2022-07-22 15:47:25,733 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 [2022-07-22 15:47:25,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 15:47:25,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 15:47:25,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 15:47:25,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 15:47:25,747 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 15:47:25,747 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 15:47:25,799 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 15:47:25,800 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 15:47:25,959 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 15:47:25,964 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 15:47:25,964 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 15:47:25,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:47:25 BoogieIcfgContainer [2022-07-22 15:47:25,966 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 15:47:25,968 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 15:47:25,968 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 15:47:25,980 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 15:47:25,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 03:47:25" (1/3) ... [2022-07-22 15:47:25,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46663565 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 03:47:25, skipping insertion in model container [2022-07-22 15:47:25,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:47:25" (2/3) ... [2022-07-22 15:47:25,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46663565 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 03:47:25, skipping insertion in model container [2022-07-22 15:47:25,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:47:25" (3/3) ... [2022-07-22 15:47:25,983 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound50.c [2022-07-22 15:47:25,996 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 15:47:25,996 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 15:47:26,055 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 15:47:26,065 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2a7b9fc0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5497883 [2022-07-22 15:47:26,066 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 15:47:26,071 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-22 15:47:26,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-22 15:47:26,078 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:47:26,079 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:47:26,080 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:47:26,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:47:26,084 INFO L85 PathProgramCache]: Analyzing trace with hash -797370321, now seen corresponding path program 1 times [2022-07-22 15:47:26,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:47:26,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188387146] [2022-07-22 15:47:26,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:47:26,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:47:26,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:47:26,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:47:26,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:47:26,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188387146] [2022-07-22 15:47:26,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188387146] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:47:26,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:47:26,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 15:47:26,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784428675] [2022-07-22 15:47:26,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:47:26,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 15:47:26,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:47:26,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 15:47:26,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 15:47:26,243 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 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 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:47:26,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:47:26,257 INFO L93 Difference]: Finished difference Result 57 states and 97 transitions. [2022-07-22 15:47:26,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 15:47:26,259 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-22 15:47:26,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:47:26,264 INFO L225 Difference]: With dead ends: 57 [2022-07-22 15:47:26,265 INFO L226 Difference]: Without dead ends: 26 [2022-07-22 15:47:26,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 15:47:26,272 INFO L413 NwaCegarLoop]: 42 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, 42 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 [2022-07-22 15:47:26,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:47:26,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-22 15:47:26,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-07-22 15:47:26,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 15:47:26,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 38 transitions. [2022-07-22 15:47:26,304 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 38 transitions. Word has length 10 [2022-07-22 15:47:26,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:47:26,305 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 38 transitions. [2022-07-22 15:47:26,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:47:26,305 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 38 transitions. [2022-07-22 15:47:26,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-22 15:47:26,307 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:47:26,307 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:47:26,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 15:47:26,308 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:47:26,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:47:26,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1698606518, now seen corresponding path program 1 times [2022-07-22 15:47:26,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:47:26,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479526659] [2022-07-22 15:47:26,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:47:26,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:47:26,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:47:26,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:47:26,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:47:26,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479526659] [2022-07-22 15:47:26,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479526659] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:47:26,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:47:26,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 15:47:26,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546011538] [2022-07-22 15:47:26,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:47:26,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 15:47:26,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:47:26,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 15:47:26,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 15:47:26,388 INFO L87 Difference]: Start difference. First operand 26 states and 38 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:47:26,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:47:26,423 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2022-07-22 15:47:26,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 15:47:26,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-22 15:47:26,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:47:26,425 INFO L225 Difference]: With dead ends: 47 [2022-07-22 15:47:26,427 INFO L226 Difference]: Without dead ends: 28 [2022-07-22 15:47:26,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 15:47:26,429 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:47:26,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 101 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:47:26,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-22 15:47:26,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-07-22 15:47:26,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 15:47:26,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2022-07-22 15:47:26,435 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 12 [2022-07-22 15:47:26,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:47:26,435 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2022-07-22 15:47:26,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:47:26,435 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2022-07-22 15:47:26,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-22 15:47:26,436 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:47:26,436 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:47:26,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 15:47:26,436 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:47:26,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:47:26,437 INFO L85 PathProgramCache]: Analyzing trace with hash 776097594, now seen corresponding path program 1 times [2022-07-22 15:47:26,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:47:26,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727096059] [2022-07-22 15:47:26,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:47:26,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:47:26,475 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:47:26,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1684229610] [2022-07-22 15:47:26,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:47:26,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:47:26,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:47:26,478 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) [2022-07-22 15:47:26,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 15:47:26,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:47:26,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 15:47:26,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:47:26,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:47:26,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 15:47:26,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:47:26,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727096059] [2022-07-22 15:47:26,634 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:47:26,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684229610] [2022-07-22 15:47:26,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684229610] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:47:26,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:47:26,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 15:47:26,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601407569] [2022-07-22 15:47:26,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:47:26,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 15:47:26,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:47:26,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 15:47:26,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 15:47:26,645 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:47:26,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:47:26,686 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2022-07-22 15:47:26,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 15:47:26,687 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-22 15:47:26,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:47:26,688 INFO L225 Difference]: With dead ends: 41 [2022-07-22 15:47:26,689 INFO L226 Difference]: Without dead ends: 32 [2022-07-22 15:47:26,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 15:47:26,692 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 4 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:47:26,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 130 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:47:26,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-22 15:47:26,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-07-22 15:47:26,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 15:47:26,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 44 transitions. [2022-07-22 15:47:26,706 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 44 transitions. Word has length 13 [2022-07-22 15:47:26,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:47:26,707 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 44 transitions. [2022-07-22 15:47:26,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:47:26,708 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 44 transitions. [2022-07-22 15:47:26,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-22 15:47:26,708 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:47:26,709 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:47:26,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 15:47:26,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:47:26,931 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:47:26,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:47:26,932 INFO L85 PathProgramCache]: Analyzing trace with hash 777587144, now seen corresponding path program 1 times [2022-07-22 15:47:26,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:47:26,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437269959] [2022-07-22 15:47:26,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:47:26,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:47:26,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:47:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:47:27,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:47:27,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437269959] [2022-07-22 15:47:27,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437269959] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:47:27,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:47:27,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 15:47:27,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071118356] [2022-07-22 15:47:27,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:47:27,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 15:47:27,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:47:27,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 15:47:27,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 15:47:27,137 INFO L87 Difference]: Start difference. First operand 31 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:47:27,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:47:27,457 INFO L93 Difference]: Finished difference Result 64 states and 96 transitions. [2022-07-22 15:47:27,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 15:47:27,458 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-22 15:47:27,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:47:27,459 INFO L225 Difference]: With dead ends: 64 [2022-07-22 15:47:27,459 INFO L226 Difference]: Without dead ends: 45 [2022-07-22 15:47:27,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 15:47:27,460 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 11 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:47:27,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 148 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:47:27,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-22 15:47:27,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2022-07-22 15:47:27,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-22 15:47:27,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2022-07-22 15:47:27,476 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 13 [2022-07-22 15:47:27,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:47:27,476 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions. [2022-07-22 15:47:27,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:47:27,477 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions. [2022-07-22 15:47:27,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-22 15:47:27,477 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:47:27,478 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:47:27,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 15:47:27,478 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:47:27,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:47:27,479 INFO L85 PathProgramCache]: Analyzing trace with hash 84493759, now seen corresponding path program 1 times [2022-07-22 15:47:27,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:47:27,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365384052] [2022-07-22 15:47:27,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:47:27,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:47:27,494 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:47:27,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441276305] [2022-07-22 15:47:27,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:47:27,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:47:27,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:47:27,504 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) [2022-07-22 15:47:27,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 15:47:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:47:27,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 15:47:27,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:47:27,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:47:27,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:47:27,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:47:27,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:47:27,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365384052] [2022-07-22 15:47:27,610 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:47:27,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441276305] [2022-07-22 15:47:27,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441276305] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:47:27,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:47:27,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-07-22 15:47:27,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551366503] [2022-07-22 15:47:27,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:47:27,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 15:47:27,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:47:27,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 15:47:27,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-22 15:47:27,621 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:47:33,359 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.67s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:47:38,154 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.79s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:47:40,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:47:40,021 INFO L93 Difference]: Finished difference Result 98 states and 142 transitions. [2022-07-22 15:47:40,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 15:47:40,022 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-22 15:47:40,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:47:40,023 INFO L225 Difference]: With dead ends: 98 [2022-07-22 15:47:40,023 INFO L226 Difference]: Without dead ends: 79 [2022-07-22 15:47:40,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-22 15:47:40,024 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 61 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2022-07-22 15:47:40,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 228 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 57 Invalid, 2 Unknown, 0 Unchecked, 12.4s Time] [2022-07-22 15:47:40,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-07-22 15:47:40,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 57. [2022-07-22 15:47:40,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 37 states have internal predecessors, (45), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-22 15:47:40,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2022-07-22 15:47:40,034 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 15 [2022-07-22 15:47:40,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:47:40,039 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2022-07-22 15:47:40,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:47:40,040 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2022-07-22 15:47:40,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-22 15:47:40,041 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:47:40,042 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:47:40,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 15:47:40,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:47:40,248 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:47:40,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:47:40,248 INFO L85 PathProgramCache]: Analyzing trace with hash -2016757679, now seen corresponding path program 1 times [2022-07-22 15:47:40,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:47:40,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655246864] [2022-07-22 15:47:40,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:47:40,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:47:40,273 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:47:40,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1850129160] [2022-07-22 15:47:40,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:47:40,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:47:40,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:47:40,280 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) [2022-07-22 15:47:40,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 15:47:40,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:47:40,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 15:47:40,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:47:40,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:47:40,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:47:40,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:47:40,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:47:40,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655246864] [2022-07-22 15:47:40,400 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:47:40,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850129160] [2022-07-22 15:47:40,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850129160] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:47:40,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:47:40,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-07-22 15:47:40,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758003825] [2022-07-22 15:47:40,401 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:47:40,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 15:47:40,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:47:40,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 15:47:40,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-22 15:47:40,402 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:47:43,873 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 [] [2022-07-22 15:47:46,483 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:47:48,484 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:47:50,504 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:47:52,506 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:47:53,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:47:53,980 INFO L93 Difference]: Finished difference Result 124 states and 173 transitions. [2022-07-22 15:47:53,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 15:47:53,981 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-22 15:47:53,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:47:53,982 INFO L225 Difference]: With dead ends: 124 [2022-07-22 15:47:53,982 INFO L226 Difference]: Without dead ends: 115 [2022-07-22 15:47:53,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-07-22 15:47:53,984 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 117 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 32 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2022-07-22 15:47:53,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 305 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 93 Invalid, 5 Unknown, 0 Unchecked, 13.5s Time] [2022-07-22 15:47:53,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-22 15:47:54,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 106. [2022-07-22 15:47:54,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 60 states have (on average 1.3333333333333333) internal successors, (80), 65 states have internal predecessors, (80), 39 states have call successors, (39), 6 states have call predecessors, (39), 6 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-22 15:47:54,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 154 transitions. [2022-07-22 15:47:54,006 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 154 transitions. Word has length 16 [2022-07-22 15:47:54,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:47:54,006 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 154 transitions. [2022-07-22 15:47:54,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:47:54,006 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 154 transitions. [2022-07-22 15:47:54,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-22 15:47:54,007 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:47:54,007 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:47:54,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 15:47:54,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:47:54,232 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:47:54,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:47:54,232 INFO L85 PathProgramCache]: Analyzing trace with hash -2015268129, now seen corresponding path program 1 times [2022-07-22 15:47:54,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:47:54,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203266702] [2022-07-22 15:47:54,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:47:54,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:47:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:47:54,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 15:47:54,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:47:54,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203266702] [2022-07-22 15:47:54,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203266702] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:47:54,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:47:54,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 15:47:54,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579616291] [2022-07-22 15:47:54,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:47:54,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 15:47:54,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:47:54,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 15:47:54,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 15:47:54,399 INFO L87 Difference]: Start difference. First operand 106 states and 154 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:47:56,917 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:47:58,922 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:48:00,924 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:48:04,014 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:48:04,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:48:04,283 INFO L93 Difference]: Finished difference Result 168 states and 248 transitions. [2022-07-22 15:48:04,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 15:48:04,286 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-22 15:48:04,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:48:04,288 INFO L225 Difference]: With dead ends: 168 [2022-07-22 15:48:04,288 INFO L226 Difference]: Without dead ends: 166 [2022-07-22 15:48:04,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 15:48:04,289 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 18 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 18 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-07-22 15:48:04,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 164 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 100 Invalid, 4 Unknown, 0 Unchecked, 9.8s Time] [2022-07-22 15:48:04,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-22 15:48:04,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 133. [2022-07-22 15:48:04,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 80 states have (on average 1.2625) internal successors, (101), 88 states have internal predecessors, (101), 42 states have call successors, (42), 10 states have call predecessors, (42), 10 states have return successors, (38), 34 states have call predecessors, (38), 38 states have call successors, (38) [2022-07-22 15:48:04,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 181 transitions. [2022-07-22 15:48:04,326 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 181 transitions. Word has length 16 [2022-07-22 15:48:04,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:48:04,327 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 181 transitions. [2022-07-22 15:48:04,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:48:04,333 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 181 transitions. [2022-07-22 15:48:04,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-22 15:48:04,335 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:48:04,336 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:48:04,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 15:48:04,336 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:48:04,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:48:04,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1484248551, now seen corresponding path program 1 times [2022-07-22 15:48:04,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:48:04,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347580851] [2022-07-22 15:48:04,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:48:04,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:48:04,350 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:48:04,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1837428696] [2022-07-22 15:48:04,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:48:04,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:48:04,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:48:04,357 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) [2022-07-22 15:48:04,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 15:48:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:48:04,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 15:48:04,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:48:04,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:48:04,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 15:48:04,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:48:04,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347580851] [2022-07-22 15:48:04,456 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:48:04,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837428696] [2022-07-22 15:48:04,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837428696] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:48:04,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:48:04,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 15:48:04,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579082783] [2022-07-22 15:48:04,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:48:04,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 15:48:04,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:48:04,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 15:48:04,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 15:48:04,460 INFO L87 Difference]: Start difference. First operand 133 states and 181 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 15:48:06,623 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:48:07,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:48:07,140 INFO L93 Difference]: Finished difference Result 186 states and 257 transitions. [2022-07-22 15:48:07,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 15:48:07,141 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-07-22 15:48:07,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:48:07,143 INFO L225 Difference]: With dead ends: 186 [2022-07-22 15:48:07,143 INFO L226 Difference]: Without dead ends: 176 [2022-07-22 15:48:07,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 15:48:07,144 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 10 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-22 15:48:07,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 107 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-22 15:48:07,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-07-22 15:48:07,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2022-07-22 15:48:07,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 105 states have (on average 1.2476190476190476) internal successors, (131), 116 states have internal predecessors, (131), 55 states have call successors, (55), 15 states have call predecessors, (55), 15 states have return successors, (49), 44 states have call predecessors, (49), 49 states have call successors, (49) [2022-07-22 15:48:07,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 235 transitions. [2022-07-22 15:48:07,172 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 235 transitions. Word has length 18 [2022-07-22 15:48:07,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:48:07,172 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 235 transitions. [2022-07-22 15:48:07,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 15:48:07,173 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 235 transitions. [2022-07-22 15:48:07,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-22 15:48:07,173 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:48:07,173 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:48:07,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 15:48:07,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:48:07,396 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:48:07,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:48:07,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1188910040, now seen corresponding path program 1 times [2022-07-22 15:48:07,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:48:07,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183170550] [2022-07-22 15:48:07,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:48:07,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:48:07,405 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:48:07,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1469234112] [2022-07-22 15:48:07,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:48:07,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:48:07,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:48:07,407 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) [2022-07-22 15:48:07,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 15:48:07,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:48:07,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 15:48:07,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:48:07,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 15:48:07,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 15:48:07,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:48:07,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183170550] [2022-07-22 15:48:07,552 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:48:07,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469234112] [2022-07-22 15:48:07,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469234112] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:48:07,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:48:07,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 15:48:07,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139773160] [2022-07-22 15:48:07,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:48:07,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 15:48:07,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:48:07,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 15:48:07,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 15:48:07,554 INFO L87 Difference]: Start difference. First operand 176 states and 235 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 15:48:08,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:48:08,792 INFO L93 Difference]: Finished difference Result 182 states and 239 transitions. [2022-07-22 15:48:08,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 15:48:08,794 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), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-07-22 15:48:08,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:48:08,795 INFO L225 Difference]: With dead ends: 182 [2022-07-22 15:48:08,795 INFO L226 Difference]: Without dead ends: 154 [2022-07-22 15:48:08,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 15:48:08,796 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:48:08,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 122 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 15:48:08,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-07-22 15:48:08,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2022-07-22 15:48:08,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 93 states have (on average 1.2580645161290323) internal successors, (117), 103 states have internal predecessors, (117), 48 states have call successors, (48), 12 states have call predecessors, (48), 12 states have return successors, (43), 38 states have call predecessors, (43), 43 states have call successors, (43) [2022-07-22 15:48:08,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 208 transitions. [2022-07-22 15:48:08,816 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 208 transitions. Word has length 23 [2022-07-22 15:48:08,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:48:08,817 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 208 transitions. [2022-07-22 15:48:08,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 15:48:08,817 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 208 transitions. [2022-07-22 15:48:08,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-22 15:48:08,818 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:48:08,818 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:48:08,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 15:48:09,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:48:09,044 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:48:09,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:48:09,044 INFO L85 PathProgramCache]: Analyzing trace with hash -158866305, now seen corresponding path program 1 times [2022-07-22 15:48:09,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:48:09,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77957253] [2022-07-22 15:48:09,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:48:09,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:48:09,053 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:48:09,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1364000216] [2022-07-22 15:48:09,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:48:09,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:48:09,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:48:09,057 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) [2022-07-22 15:48:09,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 15:48:09,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:48:09,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 15:48:09,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:48:09,207 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 15:48:09,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 15:48:09,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:48:09,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77957253] [2022-07-22 15:48:09,207 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:48:09,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364000216] [2022-07-22 15:48:09,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364000216] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:48:09,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:48:09,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 15:48:09,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22374605] [2022-07-22 15:48:09,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:48:09,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 15:48:09,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:48:09,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 15:48:09,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 15:48:09,209 INFO L87 Difference]: Start difference. First operand 154 states and 208 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 15:48:09,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:48:09,925 INFO L93 Difference]: Finished difference Result 199 states and 265 transitions. [2022-07-22 15:48:09,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 15:48:09,926 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-07-22 15:48:09,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:48:09,927 INFO L225 Difference]: With dead ends: 199 [2022-07-22 15:48:09,927 INFO L226 Difference]: Without dead ends: 194 [2022-07-22 15:48:09,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 15:48:09,928 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 15:48:09,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 124 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 15:48:09,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-07-22 15:48:09,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 182. [2022-07-22 15:48:09,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 105 states have (on average 1.180952380952381) internal successors, (124), 113 states have internal predecessors, (124), 59 states have call successors, (59), 17 states have call predecessors, (59), 17 states have return successors, (55), 51 states have call predecessors, (55), 55 states have call successors, (55) [2022-07-22 15:48:09,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 238 transitions. [2022-07-22 15:48:09,960 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 238 transitions. Word has length 26 [2022-07-22 15:48:09,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:48:09,960 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 238 transitions. [2022-07-22 15:48:09,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 15:48:09,961 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 238 transitions. [2022-07-22 15:48:09,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-22 15:48:09,964 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:48:09,964 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:48:09,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-22 15:48:10,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:48:10,169 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:48:10,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:48:10,169 INFO L85 PathProgramCache]: Analyzing trace with hash -2097639676, now seen corresponding path program 1 times [2022-07-22 15:48:10,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:48:10,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793647900] [2022-07-22 15:48:10,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:48:10,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:48:10,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:48:10,263 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:48:10,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:48:10,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793647900] [2022-07-22 15:48:10,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793647900] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:48:10,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404698329] [2022-07-22 15:48:10,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:48:10,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:48:10,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:48:10,265 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) [2022-07-22 15:48:10,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 15:48:10,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:48:10,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 15:48:10,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:48:10,346 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:48:10,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:48:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:48:10,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404698329] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:48:10,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:48:10,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-07-22 15:48:10,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080446267] [2022-07-22 15:48:10,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:48:10,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 15:48:10,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:48:10,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 15:48:10,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-07-22 15:48:10,454 INFO L87 Difference]: Start difference. First operand 182 states and 238 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:48:12,744 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 [] [2022-07-22 15:48:15,327 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:48:17,706 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:48:19,709 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:48:21,715 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:48:23,134 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:48:25,147 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:48:29,307 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:48:31,312 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:48:33,316 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:48:35,331 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:48:37,342 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:48:39,361 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:48:41,566 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:48:43,779 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:48:46,064 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:48:49,683 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:48:51,688 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:48:53,757 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:48:55,939 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:48:58,757 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:49:00,286 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:49:02,584 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:49:04,588 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:49:06,591 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:49:10,331 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:49:12,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:49:12,450 INFO L93 Difference]: Finished difference Result 512 states and 696 transitions. [2022-07-22 15:49:12,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 15:49:12,451 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-22 15:49:12,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:49:12,454 INFO L225 Difference]: With dead ends: 512 [2022-07-22 15:49:12,454 INFO L226 Difference]: Without dead ends: 461 [2022-07-22 15:49:12,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2022-07-22 15:49:12,455 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 282 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 163 mSolverCounterUnsat, 22 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 61.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 22 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.8s IncrementalHoareTripleChecker+Time [2022-07-22 15:49:12,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 497 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 308 Invalid, 22 Unknown, 0 Unchecked, 61.8s Time] [2022-07-22 15:49:12,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-07-22 15:49:12,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 443. [2022-07-22 15:49:12,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 240 states have (on average 1.2291666666666667) internal successors, (295), 256 states have internal predecessors, (295), 161 states have call successors, (161), 41 states have call predecessors, (161), 41 states have return successors, (147), 145 states have call predecessors, (147), 147 states have call successors, (147) [2022-07-22 15:49:12,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 603 transitions. [2022-07-22 15:49:12,494 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 603 transitions. Word has length 24 [2022-07-22 15:49:12,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:49:12,494 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 603 transitions. [2022-07-22 15:49:12,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:49:12,495 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 603 transitions. [2022-07-22 15:49:12,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-22 15:49:12,496 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:49:12,496 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:49:12,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-22 15:49:12,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:49:12,716 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:49:12,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:49:12,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1271100124, now seen corresponding path program 2 times [2022-07-22 15:49:12,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:49:12,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318725209] [2022-07-22 15:49:12,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:49:12,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:49:12,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:49:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:49:12,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:49:12,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318725209] [2022-07-22 15:49:12,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318725209] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:49:12,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709987176] [2022-07-22 15:49:12,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:49:12,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:49:12,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:49:12,924 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) [2022-07-22 15:49:12,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 15:49:12,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-22 15:49:12,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:49:12,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 15:49:12,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:49:13,002 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-22 15:49:13,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 15:49:13,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709987176] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:49:13,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 15:49:13,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 18 [2022-07-22 15:49:13,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645574889] [2022-07-22 15:49:13,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:49:13,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 15:49:13,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:49:13,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 15:49:13,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-07-22 15:49:13,005 INFO L87 Difference]: Start difference. First operand 443 states and 603 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:49:13,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:49:13,052 INFO L93 Difference]: Finished difference Result 491 states and 672 transitions. [2022-07-22 15:49:13,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 15:49:13,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-07-22 15:49:13,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:49:13,056 INFO L225 Difference]: With dead ends: 491 [2022-07-22 15:49:13,056 INFO L226 Difference]: Without dead ends: 440 [2022-07-22 15:49:13,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2022-07-22 15:49:13,057 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:49:13,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 133 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:49:13,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-07-22 15:49:13,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 211. [2022-07-22 15:49:13,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 117 states have (on average 1.1794871794871795) internal successors, (138), 124 states have internal predecessors, (138), 72 states have call successors, (72), 21 states have call predecessors, (72), 21 states have return successors, (66), 65 states have call predecessors, (66), 66 states have call successors, (66) [2022-07-22 15:49:13,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2022-07-22 15:49:13,080 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 42 [2022-07-22 15:49:13,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:49:13,081 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2022-07-22 15:49:13,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:49:13,081 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2022-07-22 15:49:13,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-22 15:49:13,082 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:49:13,082 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 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] [2022-07-22 15:49:13,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 15:49:13,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-22 15:49:13,296 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:49:13,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:49:13,296 INFO L85 PathProgramCache]: Analyzing trace with hash 2047122003, now seen corresponding path program 1 times [2022-07-22 15:49:13,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:49:13,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882378445] [2022-07-22 15:49:13,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:49:13,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:49:13,304 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:49:13,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [981475375] [2022-07-22 15:49:13,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:49:13,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:49:13,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:49:13,306 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) [2022-07-22 15:49:13,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process