./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test8-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/uthash-2.0.2/uthash_FNV_test8-2.i -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 b8fb715e20e93734f29581bef128b7f826b4b5933b157899cd0cb0d668434a9d --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 17:46:15,321 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 17:46:15,322 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 17:46:15,364 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 17:46:15,365 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 17:46:15,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 17:46:15,370 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 17:46:15,376 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 17:46:15,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 17:46:15,382 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 17:46:15,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 17:46:15,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 17:46:15,384 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 17:46:15,386 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 17:46:15,387 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 17:46:15,389 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 17:46:15,390 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 17:46:15,390 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 17:46:15,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 17:46:15,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 17:46:15,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 17:46:15,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 17:46:15,402 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 17:46:15,403 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 17:46:15,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 17:46:15,407 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 17:46:15,407 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 17:46:15,408 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 17:46:15,409 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 17:46:15,409 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 17:46:15,410 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 17:46:15,410 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 17:46:15,412 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 17:46:15,413 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 17:46:15,414 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 17:46:15,414 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 17:46:15,414 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 17:46:15,414 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 17:46:15,415 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 17:46:15,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 17:46:15,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 17:46:15,416 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 17:46:15,440 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 17:46:15,440 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 17:46:15,441 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 17:46:15,441 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 17:46:15,442 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 17:46:15,442 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 17:46:15,442 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 17:46:15,443 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 17:46:15,443 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 17:46:15,443 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 17:46:15,444 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 17:46:15,444 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 17:46:15,444 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 17:46:15,444 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 17:46:15,444 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 17:46:15,445 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 17:46:15,445 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 17:46:15,445 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 17:46:15,445 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 17:46:15,445 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 17:46:15,445 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 17:46:15,446 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 17:46:15,446 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 17:46:15,446 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 17:46:15,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 17:46:15,446 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 17:46:15,447 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 17:46:15,447 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 17:46:15,447 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 17:46:15,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 17:46:15,447 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 17:46:15,448 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 17:46:15,448 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 17:46:15,448 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 17:46:15,448 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8fb715e20e93734f29581bef128b7f826b4b5933b157899cd0cb0d668434a9d [2021-12-21 17:46:15,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 17:46:15,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 17:46:15,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 17:46:15,700 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 17:46:15,700 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 17:46:15,701 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test8-2.i [2021-12-21 17:46:15,756 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbe5397be/7d4a27041da0405788823be06a898ce6/FLAGaed36e3f0 [2021-12-21 17:46:16,286 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 17:46:16,286 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test8-2.i [2021-12-21 17:46:16,311 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbe5397be/7d4a27041da0405788823be06a898ce6/FLAGaed36e3f0 [2021-12-21 17:46:16,727 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbe5397be/7d4a27041da0405788823be06a898ce6 [2021-12-21 17:46:16,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 17:46:16,730 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 17:46:16,731 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 17:46:16,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 17:46:16,733 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 17:46:16,734 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 05:46:16" (1/1) ... [2021-12-21 17:46:16,735 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8efa3f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:46:16, skipping insertion in model container [2021-12-21 17:46:16,735 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 05:46:16" (1/1) ... [2021-12-21 17:46:16,740 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 17:46:16,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 17:46:17,091 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/uthash-2.0.2/uthash_FNV_test8-2.i[33021,33034] [2021-12-21 17:46:17,190 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/uthash-2.0.2/uthash_FNV_test8-2.i[45234,45247] [2021-12-21 17:46:17,202 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 17:46:17,216 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 17:46:17,253 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/uthash-2.0.2/uthash_FNV_test8-2.i[33021,33034] [2021-12-21 17:46:17,322 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/uthash-2.0.2/uthash_FNV_test8-2.i[45234,45247] [2021-12-21 17:46:17,330 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 17:46:17,359 INFO L208 MainTranslator]: Completed translation [2021-12-21 17:46:17,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:46:17 WrapperNode [2021-12-21 17:46:17,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 17:46:17,360 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 17:46:17,360 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 17:46:17,360 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 17:46:17,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:46:17" (1/1) ... [2021-12-21 17:46:17,414 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:46:17" (1/1) ... [2021-12-21 17:46:17,480 INFO L137 Inliner]: procedures = 177, calls = 348, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1151 [2021-12-21 17:46:17,480 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 17:46:17,481 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 17:46:17,481 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 17:46:17,481 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 17:46:17,496 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:46:17" (1/1) ... [2021-12-21 17:46:17,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:46:17" (1/1) ... [2021-12-21 17:46:17,505 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:46:17" (1/1) ... [2021-12-21 17:46:17,505 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:46:17" (1/1) ... [2021-12-21 17:46:17,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:46:17" (1/1) ... [2021-12-21 17:46:17,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:46:17" (1/1) ... [2021-12-21 17:46:17,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:46:17" (1/1) ... [2021-12-21 17:46:17,612 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 17:46:17,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 17:46:17,613 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 17:46:17,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 17:46:17,619 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:46:17" (1/1) ... [2021-12-21 17:46:17,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 17:46:17,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:46:17,648 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 17:46:17,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 17:46:17,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 17:46:17,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-21 17:46:17,686 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-21 17:46:17,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 17:46:17,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-21 17:46:17,687 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-21 17:46:17,687 INFO L130 BoogieDeclarations]: Found specification of procedure test_int [2021-12-21 17:46:17,687 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int [2021-12-21 17:46:17,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 17:46:17,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 17:46:17,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 17:46:17,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 17:46:17,688 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-21 17:46:17,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 17:46:17,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 17:46:17,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 17:46:17,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 17:46:17,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 17:46:17,920 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 17:46:17,921 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 17:46:18,775 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 17:46:18,787 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 17:46:18,788 INFO L299 CfgBuilder]: Removed 71 assume(true) statements. [2021-12-21 17:46:18,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 05:46:18 BoogieIcfgContainer [2021-12-21 17:46:18,790 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 17:46:18,792 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 17:46:18,792 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 17:46:18,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 17:46:18,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 05:46:16" (1/3) ... [2021-12-21 17:46:18,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@620a0bf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 05:46:18, skipping insertion in model container [2021-12-21 17:46:18,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:46:17" (2/3) ... [2021-12-21 17:46:18,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@620a0bf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 05:46:18, skipping insertion in model container [2021-12-21 17:46:18,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 05:46:18" (3/3) ... [2021-12-21 17:46:18,797 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test8-2.i [2021-12-21 17:46:18,801 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 17:46:18,803 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-21 17:46:18,839 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 17:46:18,846 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 17:46:18,846 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-21 17:46:18,869 INFO L276 IsEmpty]: Start isEmpty. Operand has 255 states, 229 states have (on average 1.6943231441048034) internal successors, (388), 246 states have internal predecessors, (388), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 6 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-21 17:46:18,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-21 17:46:18,872 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:46:18,873 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:46:18,873 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 17:46:18,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:46:18,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1334755327, now seen corresponding path program 1 times [2021-12-21 17:46:18,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:46:18,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431517497] [2021-12-21 17:46:18,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:46:18,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:46:18,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:46:19,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:46:19,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:46:19,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431517497] [2021-12-21 17:46:19,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431517497] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 17:46:19,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 17:46:19,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 17:46:19,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80243493] [2021-12-21 17:46:19,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 17:46:19,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 17:46:19,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:46:19,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 17:46:19,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 17:46:19,069 INFO L87 Difference]: Start difference. First operand has 255 states, 229 states have (on average 1.6943231441048034) internal successors, (388), 246 states have internal predecessors, (388), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 6 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:46:19,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:46:19,120 INFO L93 Difference]: Finished difference Result 508 states and 871 transitions. [2021-12-21 17:46:19,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 17:46:19,122 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-21 17:46:19,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:46:19,130 INFO L225 Difference]: With dead ends: 508 [2021-12-21 17:46:19,130 INFO L226 Difference]: Without dead ends: 222 [2021-12-21 17:46:19,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 17:46:19,137 INFO L933 BasicCegarLoop]: 351 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, 351 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 17:46:19,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 17:46:19,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-12-21 17:46:19,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2021-12-21 17:46:19,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 197 states have (on average 1.3553299492385786) internal successors, (267), 213 states have internal predecessors, (267), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 6 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-21 17:46:19,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 307 transitions. [2021-12-21 17:46:19,184 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 307 transitions. Word has length 9 [2021-12-21 17:46:19,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:46:19,185 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 307 transitions. [2021-12-21 17:46:19,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:46:19,185 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 307 transitions. [2021-12-21 17:46:19,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 17:46:19,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:46:19,188 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:46:19,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 17:46:19,188 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 17:46:19,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:46:19,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1790395171, now seen corresponding path program 1 times [2021-12-21 17:46:19,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:46:19,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250367867] [2021-12-21 17:46:19,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:46:19,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:46:19,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:46:19,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:46:19,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:46:19,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250367867] [2021-12-21 17:46:19,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250367867] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 17:46:19,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 17:46:19,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 17:46:19,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905816071] [2021-12-21 17:46:19,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 17:46:19,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 17:46:19,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:46:19,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 17:46:19,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 17:46:19,294 INFO L87 Difference]: Start difference. First operand 222 states and 307 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:46:19,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:46:19,649 INFO L93 Difference]: Finished difference Result 463 states and 642 transitions. [2021-12-21 17:46:19,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 17:46:19,650 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-21 17:46:19,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:46:19,653 INFO L225 Difference]: With dead ends: 463 [2021-12-21 17:46:19,653 INFO L226 Difference]: Without dead ends: 338 [2021-12-21 17:46:19,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 17:46:19,654 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 143 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 17:46:19,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 782 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 17:46:19,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-12-21 17:46:19,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 224. [2021-12-21 17:46:19,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 199 states have (on average 1.3517587939698492) internal successors, (269), 215 states have internal predecessors, (269), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 6 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-21 17:46:19,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 309 transitions. [2021-12-21 17:46:19,675 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 309 transitions. Word has length 44 [2021-12-21 17:46:19,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:46:19,675 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 309 transitions. [2021-12-21 17:46:19,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:46:19,675 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 309 transitions. [2021-12-21 17:46:19,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-21 17:46:19,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:46:19,677 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:46:19,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 17:46:19,678 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 17:46:19,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:46:19,678 INFO L85 PathProgramCache]: Analyzing trace with hash -342228401, now seen corresponding path program 1 times [2021-12-21 17:46:19,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:46:19,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083271364] [2021-12-21 17:46:19,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:46:19,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:46:19,813 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 17:46:19,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [7871794] [2021-12-21 17:46:19,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:46:19,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:46:19,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:46:19,827 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 17:46:19,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 17:46:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:46:20,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 1551 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 17:46:20,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:46:20,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:46:20,529 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 17:46:20,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:46:20,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083271364] [2021-12-21 17:46:20,530 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 17:46:20,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7871794] [2021-12-21 17:46:20,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7871794] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 17:46:20,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 17:46:20,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 17:46:20,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387043002] [2021-12-21 17:46:20,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 17:46:20,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 17:46:20,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:46:20,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 17:46:20,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 17:46:20,533 INFO L87 Difference]: Start difference. First operand 224 states and 309 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:46:20,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:46:20,599 INFO L93 Difference]: Finished difference Result 465 states and 645 transitions. [2021-12-21 17:46:20,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 17:46:20,599 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-21 17:46:20,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:46:20,601 INFO L225 Difference]: With dead ends: 465 [2021-12-21 17:46:20,601 INFO L226 Difference]: Without dead ends: 245 [2021-12-21 17:46:20,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 17:46:20,603 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 9 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 17:46:20,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 559 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 17:46:20,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-12-21 17:46:20,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 244. [2021-12-21 17:46:20,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 219 states have (on average 1.3196347031963471) internal successors, (289), 235 states have internal predecessors, (289), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 6 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-21 17:46:20,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 329 transitions. [2021-12-21 17:46:20,617 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 329 transitions. Word has length 61 [2021-12-21 17:46:20,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:46:20,617 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 329 transitions. [2021-12-21 17:46:20,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:46:20,617 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 329 transitions. [2021-12-21 17:46:20,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-21 17:46:20,619 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:46:20,619 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:46:20,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 17:46:20,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:46:20,843 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 17:46:20,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:46:20,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1749706579, now seen corresponding path program 1 times [2021-12-21 17:46:20,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:46:20,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207874961] [2021-12-21 17:46:20,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:46:20,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:46:20,945 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 17:46:20,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558632715] [2021-12-21 17:46:20,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:46:20,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:46:20,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:46:20,947 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 17:46:20,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 17:46:21,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:46:21,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 1555 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 17:46:21,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:46:21,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:46:21,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 17:46:21,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:46:21,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207874961] [2021-12-21 17:46:21,663 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 17:46:21,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558632715] [2021-12-21 17:46:21,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558632715] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 17:46:21,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 17:46:21,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 17:46:21,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557822639] [2021-12-21 17:46:21,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 17:46:21,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 17:46:21,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:46:21,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 17:46:21,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 17:46:21,671 INFO L87 Difference]: Start difference. First operand 244 states and 329 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:46:21,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:46:21,776 INFO L93 Difference]: Finished difference Result 476 states and 646 transitions. [2021-12-21 17:46:21,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 17:46:21,777 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-21 17:46:21,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:46:21,780 INFO L225 Difference]: With dead ends: 476 [2021-12-21 17:46:21,780 INFO L226 Difference]: Without dead ends: 236 [2021-12-21 17:46:21,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 17:46:21,783 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 213 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 17:46:21,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 647 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 17:46:21,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-12-21 17:46:21,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 230. [2021-12-21 17:46:21,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 205 states have (on average 1.3073170731707318) internal successors, (268), 221 states have internal predecessors, (268), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 6 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-21 17:46:21,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 308 transitions. [2021-12-21 17:46:21,794 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 308 transitions. Word has length 61 [2021-12-21 17:46:21,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:46:21,795 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 308 transitions. [2021-12-21 17:46:21,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:46:21,795 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 308 transitions. [2021-12-21 17:46:21,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-21 17:46:21,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:46:21,798 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:46:21,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-21 17:46:22,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-21 17:46:22,020 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 17:46:22,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:46:22,020 INFO L85 PathProgramCache]: Analyzing trace with hash 933653125, now seen corresponding path program 1 times [2021-12-21 17:46:22,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:46:22,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653738445] [2021-12-21 17:46:22,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:46:22,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:46:22,104 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 17:46:22,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [496954653] [2021-12-21 17:46:22,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:46:22,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:46:22,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:46:22,106 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 17:46:22,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 17:46:22,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:46:22,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 1541 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 17:46:22,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:46:23,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:46:23,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 17:46:23,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:46:23,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653738445] [2021-12-21 17:46:23,023 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 17:46:23,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496954653] [2021-12-21 17:46:23,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496954653] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 17:46:23,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 17:46:23,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 17:46:23,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075064804] [2021-12-21 17:46:23,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 17:46:23,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 17:46:23,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:46:23,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 17:46:23,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 17:46:23,025 INFO L87 Difference]: Start difference. First operand 230 states and 308 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:46:23,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:46:23,095 INFO L93 Difference]: Finished difference Result 567 states and 751 transitions. [2021-12-21 17:46:23,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 17:46:23,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-21 17:46:23,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:46:23,097 INFO L225 Difference]: With dead ends: 567 [2021-12-21 17:46:23,097 INFO L226 Difference]: Without dead ends: 341 [2021-12-21 17:46:23,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 17:46:23,099 INFO L933 BasicCegarLoop]: 344 mSDtfsCounter, 98 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 17:46:23,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 616 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 17:46:23,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-12-21 17:46:23,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 338. [2021-12-21 17:46:23,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 312 states have (on average 1.2852564102564104) internal successors, (401), 328 states have internal predecessors, (401), 21 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (21), 7 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-21 17:46:23,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 443 transitions. [2021-12-21 17:46:23,110 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 443 transitions. Word has length 61 [2021-12-21 17:46:23,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:46:23,111 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 443 transitions. [2021-12-21 17:46:23,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:46:23,111 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 443 transitions. [2021-12-21 17:46:23,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-21 17:46:23,113 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:46:23,113 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:46:23,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 17:46:23,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:46:23,336 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 17:46:23,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:46:23,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1452917895, now seen corresponding path program 1 times [2021-12-21 17:46:23,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:46:23,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385126817] [2021-12-21 17:46:23,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:46:23,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:46:23,390 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 17:46:23,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [410049670] [2021-12-21 17:46:23,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:46:23,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:46:23,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:46:23,393 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 17:46:23,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 17:46:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:46:23,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 17:46:23,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:46:24,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:46:24,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 17:46:24,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:46:24,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385126817] [2021-12-21 17:46:24,085 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 17:46:24,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410049670] [2021-12-21 17:46:24,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410049670] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 17:46:24,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 17:46:24,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 17:46:24,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538443103] [2021-12-21 17:46:24,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 17:46:24,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 17:46:24,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:46:24,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 17:46:24,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 17:46:24,088 INFO L87 Difference]: Start difference. First operand 338 states and 443 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 17:46:24,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:46:24,132 INFO L93 Difference]: Finished difference Result 631 states and 839 transitions. [2021-12-21 17:46:24,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 17:46:24,133 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76 [2021-12-21 17:46:24,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:46:24,136 INFO L225 Difference]: With dead ends: 631 [2021-12-21 17:46:24,136 INFO L226 Difference]: Without dead ends: 341 [2021-12-21 17:46:24,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 17:46:24,138 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 2 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 17:46:24,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 887 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 17:46:24,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-12-21 17:46:24,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 341. [2021-12-21 17:46:24,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 314 states have (on average 1.286624203821656) internal successors, (404), 331 states have internal predecessors, (404), 21 states have call successors, (21), 3 states have call predecessors, (21), 4 states have return successors, (22), 7 states have call predecessors, (22), 21 states have call successors, (22) [2021-12-21 17:46:24,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 447 transitions. [2021-12-21 17:46:24,155 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 447 transitions. Word has length 76 [2021-12-21 17:46:24,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:46:24,156 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 447 transitions. [2021-12-21 17:46:24,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 17:46:24,156 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 447 transitions. [2021-12-21 17:46:24,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-21 17:46:24,157 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:46:24,157 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:46:24,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 17:46:24,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:46:24,373 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 17:46:24,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:46:24,374 INFO L85 PathProgramCache]: Analyzing trace with hash -975375717, now seen corresponding path program 1 times [2021-12-21 17:46:24,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:46:24,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938643473] [2021-12-21 17:46:24,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:46:24,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:46:24,413 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 17:46:24,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114628721] [2021-12-21 17:46:24,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:46:24,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:46:24,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:46:24,415 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 17:46:24,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 17:46:25,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:46:25,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 17:46:25,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:46:25,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 17:46:25,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 17:46:25,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 17:46:25,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:46:25,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938643473] [2021-12-21 17:46:25,327 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 17:46:25,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114628721] [2021-12-21 17:46:25,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114628721] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 17:46:25,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 17:46:25,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-21 17:46:25,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076229925] [2021-12-21 17:46:25,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 17:46:25,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 17:46:25,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:46:25,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 17:46:25,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 17:46:25,329 INFO L87 Difference]: Start difference. First operand 341 states and 447 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 17:46:25,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:46:25,433 INFO L93 Difference]: Finished difference Result 645 states and 861 transitions. [2021-12-21 17:46:25,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 17:46:25,433 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 78 [2021-12-21 17:46:25,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:46:25,435 INFO L225 Difference]: With dead ends: 645 [2021-12-21 17:46:25,436 INFO L226 Difference]: Without dead ends: 352 [2021-12-21 17:46:25,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-12-21 17:46:25,437 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 24 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 17:46:25,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 888 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 17:46:25,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-12-21 17:46:25,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 350. [2021-12-21 17:46:25,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 322 states have (on average 1.2981366459627328) internal successors, (418), 339 states have internal predecessors, (418), 21 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (23), 7 states have call predecessors, (23), 21 states have call successors, (23) [2021-12-21 17:46:25,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 462 transitions. [2021-12-21 17:46:25,449 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 462 transitions. Word has length 78 [2021-12-21 17:46:25,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:46:25,450 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 462 transitions. [2021-12-21 17:46:25,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 17:46:25,450 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 462 transitions. [2021-12-21 17:46:25,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-21 17:46:25,451 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:46:25,451 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:46:25,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 17:46:25,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:46:25,675 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 17:46:25,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:46:25,676 INFO L85 PathProgramCache]: Analyzing trace with hash -111872071, now seen corresponding path program 2 times [2021-12-21 17:46:25,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:46:25,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780076202] [2021-12-21 17:46:25,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:46:25,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:46:25,714 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 17:46:25,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1696039799] [2021-12-21 17:46:25,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 17:46:25,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:46:25,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:46:25,716 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 17:46:25,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 17:47:18,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 17:47:18,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 17:47:18,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-21 17:47:18,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:47:18,898 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 17:47:18,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 17:47:19,145 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 17:47:19,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:47:19,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780076202] [2021-12-21 17:47:19,146 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 17:47:19,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696039799] [2021-12-21 17:47:19,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696039799] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 17:47:19,146 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 17:47:19,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-12-21 17:47:19,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252202733] [2021-12-21 17:47:19,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 17:47:19,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 17:47:19,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:47:19,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 17:47:19,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-21 17:47:19,148 INFO L87 Difference]: Start difference. First operand 350 states and 462 transitions. Second operand has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 17:47:19,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:47:19,400 INFO L93 Difference]: Finished difference Result 695 states and 924 transitions. [2021-12-21 17:47:19,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 17:47:19,400 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 82 [2021-12-21 17:47:19,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:47:19,402 INFO L225 Difference]: With dead ends: 695 [2021-12-21 17:47:19,402 INFO L226 Difference]: Without dead ends: 350 [2021-12-21 17:47:19,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-12-21 17:47:19,416 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 237 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 17:47:19,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 1230 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 17:47:19,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-12-21 17:47:19,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 348. [2021-12-21 17:47:19,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 320 states have (on average 1.29375) internal successors, (414), 337 states have internal predecessors, (414), 21 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (22), 7 states have call predecessors, (22), 21 states have call successors, (22) [2021-12-21 17:47:19,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 457 transitions. [2021-12-21 17:47:19,429 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 457 transitions. Word has length 82 [2021-12-21 17:47:19,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:47:19,429 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 457 transitions. [2021-12-21 17:47:19,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 17:47:19,430 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 457 transitions. [2021-12-21 17:47:19,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-21 17:47:19,431 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:47:19,431 INFO L514 BasicCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:47:19,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 17:47:19,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:47:19,655 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 17:47:19,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:47:19,655 INFO L85 PathProgramCache]: Analyzing trace with hash -290633159, now seen corresponding path program 3 times [2021-12-21 17:47:19,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:47:19,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198735327] [2021-12-21 17:47:19,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:47:19,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:47:19,703 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 17:47:19,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1969798116] [2021-12-21 17:47:19,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 17:47:19,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:47:19,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:47:19,705 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 17:47:19,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process