./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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_test10-3.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 c098eb2ea0abe7b0f4b25f613d67df9ef36b2215e5396f258b75924d2167f9c8 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 15:58:43,954 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 15:58:43,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 15:58:43,996 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 15:58:43,996 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 15:58:43,997 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 15:58:44,000 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 15:58:44,003 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 15:58:44,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 15:58:44,008 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 15:58:44,009 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 15:58:44,013 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 15:58:44,013 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 15:58:44,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 15:58:44,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 15:58:44,018 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 15:58:44,019 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 15:58:44,020 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 15:58:44,022 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 15:58:44,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 15:58:44,040 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 15:58:44,041 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 15:58:44,041 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 15:58:44,042 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 15:58:44,043 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 15:58:44,048 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 15:58:44,050 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 15:58:44,051 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 15:58:44,052 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 15:58:44,052 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 15:58:44,052 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 15:58:44,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 15:58:44,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 15:58:44,055 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 15:58:44,055 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 15:58:44,056 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 15:58:44,056 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 15:58:44,056 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 15:58:44,056 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 15:58:44,057 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 15:58:44,057 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 15:58:44,058 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 15:58:44,058 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 15:58:44,073 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 15:58:44,074 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 15:58:44,074 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 15:58:44,074 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 15:58:44,075 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 15:58:44,075 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 15:58:44,076 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 15:58:44,076 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 15:58:44,076 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 15:58:44,076 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 15:58:44,077 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 15:58:44,077 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 15:58:44,077 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 15:58:44,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 15:58:44,077 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 15:58:44,078 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 15:58:44,078 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 15:58:44,078 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 15:58:44,078 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 15:58:44,078 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 15:58:44,078 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 15:58:44,079 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 15:58:44,079 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 15:58:44,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 15:58:44,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 15:58:44,080 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 15:58:44,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 15:58:44,080 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 15:58:44,080 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 15:58:44,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 15:58:44,081 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 15:58:44,081 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 15:58:44,081 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 15:58:44,081 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c098eb2ea0abe7b0f4b25f613d67df9ef36b2215e5396f258b75924d2167f9c8 [2022-07-21 15:58:44,401 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 15:58:44,418 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 15:58:44,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 15:58:44,421 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 15:58:44,421 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 15:58:44,422 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-3.i [2022-07-21 15:58:44,466 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7f79415d/27953186be934b6d91a00de28eefea3d/FLAGf63f348ae [2022-07-21 15:58:44,933 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 15:58:44,934 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test10-3.i [2022-07-21 15:58:44,953 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7f79415d/27953186be934b6d91a00de28eefea3d/FLAGf63f348ae [2022-07-21 15:58:45,227 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7f79415d/27953186be934b6d91a00de28eefea3d [2022-07-21 15:58:45,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 15:58:45,230 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 15:58:45,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 15:58:45,231 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 15:58:45,234 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 15:58:45,234 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:58:45" (1/1) ... [2022-07-21 15:58:45,235 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61ddeab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:58:45, skipping insertion in model container [2022-07-21 15:58:45,235 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:58:45" (1/1) ... [2022-07-21 15:58:45,240 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 15:58:45,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 15:58:45,543 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_test10-3.i[33022,33035] [2022-07-21 15:58:45,669 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 15:58:45,675 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 15:58:45,718 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_test10-3.i[33022,33035] [2022-07-21 15:58:45,804 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 15:58:45,834 INFO L208 MainTranslator]: Completed translation [2022-07-21 15:58:45,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:58:45 WrapperNode [2022-07-21 15:58:45,838 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 15:58:45,839 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 15:58:45,839 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 15:58:45,839 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 15:58:45,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:58:45" (1/1) ... [2022-07-21 15:58:45,889 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:58:45" (1/1) ... [2022-07-21 15:58:46,015 INFO L137 Inliner]: procedures = 177, calls = 623, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2467 [2022-07-21 15:58:46,016 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 15:58:46,017 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 15:58:46,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 15:58:46,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 15:58:46,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:58:45" (1/1) ... [2022-07-21 15:58:46,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:58:45" (1/1) ... [2022-07-21 15:58:46,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:58:45" (1/1) ... [2022-07-21 15:58:46,041 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:58:45" (1/1) ... [2022-07-21 15:58:46,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:58:45" (1/1) ... [2022-07-21 15:58:46,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:58:45" (1/1) ... [2022-07-21 15:58:46,170 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:58:45" (1/1) ... [2022-07-21 15:58:46,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 15:58:46,205 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 15:58:46,205 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 15:58:46,205 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 15:58:46,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:58:45" (1/1) ... [2022-07-21 15:58:46,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 15:58:46,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 15:58:46,245 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 15:58:46,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 15:58:46,272 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2022-07-21 15:58:46,273 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2022-07-21 15:58:46,273 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 15:58:46,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-21 15:58:46,273 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-21 15:58:46,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 15:58:46,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-07-21 15:58:46,273 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-07-21 15:58:46,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 15:58:46,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 15:58:46,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 15:58:46,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 15:58:46,274 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-07-21 15:58:46,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 15:58:46,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 15:58:46,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 15:58:46,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 15:58:46,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 15:58:46,520 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 15:58:46,521 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 15:58:48,077 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 15:58:48,091 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 15:58:48,091 INFO L299 CfgBuilder]: Removed 168 assume(true) statements. [2022-07-21 15:58:48,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:58:48 BoogieIcfgContainer [2022-07-21 15:58:48,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 15:58:48,096 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 15:58:48,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 15:58:48,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 15:58:48,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 03:58:45" (1/3) ... [2022-07-21 15:58:48,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e5e6fcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:58:48, skipping insertion in model container [2022-07-21 15:58:48,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:58:45" (2/3) ... [2022-07-21 15:58:48,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e5e6fcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:58:48, skipping insertion in model container [2022-07-21 15:58:48,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:58:48" (3/3) ... [2022-07-21 15:58:48,101 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test10-3.i [2022-07-21 15:58:48,111 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 15:58:48,112 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 15:58:48,158 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 15:58:48,164 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3eca758f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6d40e693 [2022-07-21 15:58:48,164 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 15:58:48,169 INFO L276 IsEmpty]: Start isEmpty. Operand has 478 states, 459 states have (on average 1.7124183006535947) internal successors, (786), 464 states have internal predecessors, (786), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-21 15:58:48,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 15:58:48,176 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 15:58:48,177 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 15:58:48,177 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 15:58:48,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 15:58:48,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1002051803, now seen corresponding path program 1 times [2022-07-21 15:58:48,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 15:58:48,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763569794] [2022-07-21 15:58:48,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:58:48,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 15:58:48,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 15:58:48,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 15:58:48,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 15:58:48,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763569794] [2022-07-21 15:58:48,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763569794] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 15:58:48,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 15:58:48,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 15:58:48,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147159026] [2022-07-21 15:58:48,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 15:58:48,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 15:58:48,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 15:58:48,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 15:58:48,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 15:58:48,324 INFO L87 Difference]: Start difference. First operand has 478 states, 459 states have (on average 1.7124183006535947) internal successors, (786), 464 states have internal predecessors, (786), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-07-21 15:58:48,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 15:58:48,387 INFO L93 Difference]: Finished difference Result 954 states and 1634 transitions. [2022-07-21 15:58:48,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 15:58:48,390 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 13 [2022-07-21 15:58:48,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 15:58:48,399 INFO L225 Difference]: With dead ends: 954 [2022-07-21 15:58:48,399 INFO L226 Difference]: Without dead ends: 424 [2022-07-21 15:58:48,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 15:58:48,407 INFO L413 NwaCegarLoop]: 638 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, 638 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 15:58:48,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 15:58:48,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-07-21 15:58:48,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 424. [2022-07-21 15:58:48,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 406 states have (on average 1.3251231527093597) internal successors, (538), 411 states have internal predecessors, (538), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-21 15:58:48,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 565 transitions. [2022-07-21 15:58:48,472 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 565 transitions. Word has length 13 [2022-07-21 15:58:48,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 15:58:48,472 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 565 transitions. [2022-07-21 15:58:48,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-07-21 15:58:48,473 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 565 transitions. [2022-07-21 15:58:48,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-21 15:58:48,475 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 15:58:48,475 INFO L195 NwaCegarLoop]: 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] [2022-07-21 15:58:48,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 15:58:48,476 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 15:58:48,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 15:58:48,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1116117503, now seen corresponding path program 1 times [2022-07-21 15:58:48,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 15:58:48,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848573409] [2022-07-21 15:58:48,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:58:48,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 15:58:48,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 15:58:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 15:58:48,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 15:58:48,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848573409] [2022-07-21 15:58:48,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848573409] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 15:58:48,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 15:58:48,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 15:58:48,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998768692] [2022-07-21 15:58:48,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 15:58:48,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 15:58:48,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 15:58:48,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 15:58:48,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 15:58:48,601 INFO L87 Difference]: Start difference. First operand 424 states and 565 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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) [2022-07-21 15:58:49,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 15:58:49,017 INFO L93 Difference]: Finished difference Result 745 states and 997 transitions. [2022-07-21 15:58:49,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 15:58:49,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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 48 [2022-07-21 15:58:49,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 15:58:49,020 INFO L225 Difference]: With dead ends: 745 [2022-07-21 15:58:49,020 INFO L226 Difference]: Without dead ends: 499 [2022-07-21 15:58:49,021 INFO L412 NwaCegarLoop]: 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 [2022-07-21 15:58:49,022 INFO L413 NwaCegarLoop]: 536 mSDtfsCounter, 96 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 15:58:49,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 1471 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 15:58:49,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-07-21 15:58:49,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 426. [2022-07-21 15:58:49,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 408 states have (on average 1.3235294117647058) internal successors, (540), 413 states have internal predecessors, (540), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-21 15:58:49,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 567 transitions. [2022-07-21 15:58:49,038 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 567 transitions. Word has length 48 [2022-07-21 15:58:49,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 15:58:49,039 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 567 transitions. [2022-07-21 15:58:49,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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) [2022-07-21 15:58:49,039 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 567 transitions. [2022-07-21 15:58:49,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-21 15:58:49,042 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 15:58:49,042 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 15:58:49,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 15:58:49,042 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 15:58:49,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 15:58:49,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1476092237, now seen corresponding path program 1 times [2022-07-21 15:58:49,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 15:58:49,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195584233] [2022-07-21 15:58:49,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:58:49,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 15:58:49,134 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 15:58:49,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [563034269] [2022-07-21 15:58:49,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:58:49,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:58:49,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 15:58:49,136 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 15:58:49,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 15:58:49,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 15:58:49,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 1679 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 15:58:49,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 15:58:49,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 15:58:49,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 15:58:49,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 15:58:49,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195584233] [2022-07-21 15:58:49,833 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 15:58:49,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563034269] [2022-07-21 15:58:49,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563034269] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 15:58:49,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 15:58:49,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 15:58:49,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61742126] [2022-07-21 15:58:49,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 15:58:49,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 15:58:49,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 15:58:49,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 15:58:49,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 15:58:49,835 INFO L87 Difference]: Start difference. First operand 426 states and 567 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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) [2022-07-21 15:58:49,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 15:58:49,927 INFO L93 Difference]: Finished difference Result 869 states and 1161 transitions. [2022-07-21 15:58:49,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 15:58:49,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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 101 [2022-07-21 15:58:49,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 15:58:49,930 INFO L225 Difference]: With dead ends: 869 [2022-07-21 15:58:49,930 INFO L226 Difference]: Without dead ends: 447 [2022-07-21 15:58:49,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 15:58:49,934 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 9 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1075 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 [2022-07-21 15:58:49,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1075 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 15:58:49,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-07-21 15:58:49,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 446. [2022-07-21 15:58:49,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 428 states have (on average 1.308411214953271) internal successors, (560), 433 states have internal predecessors, (560), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-21 15:58:49,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 587 transitions. [2022-07-21 15:58:49,953 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 587 transitions. Word has length 101 [2022-07-21 15:58:49,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 15:58:49,957 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 587 transitions. [2022-07-21 15:58:49,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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) [2022-07-21 15:58:49,957 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 587 transitions. [2022-07-21 15:58:49,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-21 15:58:49,959 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 15:58:49,960 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 15:58:49,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 15:58:50,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:58:50,176 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 15:58:50,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 15:58:50,176 INFO L85 PathProgramCache]: Analyzing trace with hash -418254159, now seen corresponding path program 1 times [2022-07-21 15:58:50,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 15:58:50,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285010584] [2022-07-21 15:58:50,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:58:50,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 15:58:50,305 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 15:58:50,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [164743750] [2022-07-21 15:58:50,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:58:50,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:58:50,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 15:58:50,307 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 15:58:50,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 15:58:50,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 15:58:50,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 1681 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 15:58:50,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 15:58:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 15:58:50,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 15:58:50,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 15:58:50,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285010584] [2022-07-21 15:58:50,957 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 15:58:50,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164743750] [2022-07-21 15:58:50,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164743750] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 15:58:50,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 15:58:50,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 15:58:50,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28233016] [2022-07-21 15:58:50,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 15:58:50,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 15:58:50,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 15:58:50,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 15:58:50,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 15:58:50,967 INFO L87 Difference]: Start difference. First operand 446 states and 587 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2022-07-21 15:58:51,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 15:58:51,021 INFO L93 Difference]: Finished difference Result 701 states and 934 transitions. [2022-07-21 15:58:51,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 15:58:51,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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 101 [2022-07-21 15:58:51,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 15:58:51,025 INFO L225 Difference]: With dead ends: 701 [2022-07-21 15:58:51,025 INFO L226 Difference]: Without dead ends: 467 [2022-07-21 15:58:51,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 15:58:51,028 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 9 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1075 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 15:58:51,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1075 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 15:58:51,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-07-21 15:58:51,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 466. [2022-07-21 15:58:51,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 448 states have (on average 1.2946428571428572) internal successors, (580), 453 states have internal predecessors, (580), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-21 15:58:51,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 607 transitions. [2022-07-21 15:58:51,040 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 607 transitions. Word has length 101 [2022-07-21 15:58:51,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 15:58:51,041 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 607 transitions. [2022-07-21 15:58:51,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2022-07-21 15:58:51,041 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 607 transitions. [2022-07-21 15:58:51,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-21 15:58:51,043 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 15:58:51,044 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 15:58:51,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-21 15:58:51,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-21 15:58:51,254 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 15:58:51,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 15:58:51,255 INFO L85 PathProgramCache]: Analyzing trace with hash -637108877, now seen corresponding path program 1 times [2022-07-21 15:58:51,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 15:58:51,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455695671] [2022-07-21 15:58:51,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:58:51,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 15:58:51,354 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 15:58:51,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262029716] [2022-07-21 15:58:51,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:58:51,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:58:51,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 15:58:51,372 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 15:58:51,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 15:58:52,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 15:58:52,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 1683 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 15:58:52,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 15:58:52,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 15:58:52,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 15:58:52,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 15:58:52,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455695671] [2022-07-21 15:58:52,046 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 15:58:52,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262029716] [2022-07-21 15:58:52,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262029716] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 15:58:52,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 15:58:52,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 15:58:52,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931612669] [2022-07-21 15:58:52,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 15:58:52,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 15:58:52,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 15:58:52,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 15:58:52,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 15:58:52,048 INFO L87 Difference]: Start difference. First operand 466 states and 607 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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) [2022-07-21 15:58:52,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 15:58:52,115 INFO L93 Difference]: Finished difference Result 1004 states and 1314 transitions. [2022-07-21 15:58:52,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 15:58:52,116 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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 101 [2022-07-21 15:58:52,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 15:58:52,118 INFO L225 Difference]: With dead ends: 1004 [2022-07-21 15:58:52,118 INFO L226 Difference]: Without dead ends: 542 [2022-07-21 15:58:52,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 15:58:52,119 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 506 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 1460 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 15:58:52,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 1460 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 15:58:52,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-07-21 15:58:52,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 452. [2022-07-21 15:58:52,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 434 states have (on average 1.2880184331797235) internal successors, (559), 439 states have internal predecessors, (559), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-21 15:58:52,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 586 transitions. [2022-07-21 15:58:52,131 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 586 transitions. Word has length 101 [2022-07-21 15:58:52,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 15:58:52,131 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 586 transitions. [2022-07-21 15:58:52,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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) [2022-07-21 15:58:52,131 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 586 transitions. [2022-07-21 15:58:52,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-21 15:58:52,132 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 15:58:52,133 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 15:58:52,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 15:58:52,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:58:52,354 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 15:58:52,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 15:58:52,355 INFO L85 PathProgramCache]: Analyzing trace with hash 416687617, now seen corresponding path program 1 times [2022-07-21 15:58:52,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 15:58:52,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85444327] [2022-07-21 15:58:52,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:58:52,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 15:58:52,429 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 15:58:52,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1669688941] [2022-07-21 15:58:52,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:58:52,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:58:52,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 15:58:52,486 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 15:58:52,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 15:58:53,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 15:58:53,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 1669 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 15:58:53,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 15:58:53,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 15:58:53,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 15:58:53,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 15:58:53,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85444327] [2022-07-21 15:58:53,205 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 15:58:53,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669688941] [2022-07-21 15:58:53,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669688941] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 15:58:53,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 15:58:53,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 15:58:53,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389354313] [2022-07-21 15:58:53,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 15:58:53,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 15:58:53,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 15:58:53,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 15:58:53,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 15:58:53,207 INFO L87 Difference]: Start difference. First operand 452 states and 586 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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) [2022-07-21 15:58:53,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 15:58:53,259 INFO L93 Difference]: Finished difference Result 675 states and 882 transitions. [2022-07-21 15:58:53,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 15:58:53,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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 101 [2022-07-21 15:58:53,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 15:58:53,261 INFO L225 Difference]: With dead ends: 675 [2022-07-21 15:58:53,261 INFO L226 Difference]: Without dead ends: 439 [2022-07-21 15:58:53,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 15:58:53,262 INFO L413 NwaCegarLoop]: 531 mSDtfsCounter, 287 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 15:58:53,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 1308 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 15:58:53,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-07-21 15:58:53,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 438. [2022-07-21 15:58:53,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 420 states have (on average 1.2809523809523808) internal successors, (538), 425 states have internal predecessors, (538), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-21 15:58:53,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 565 transitions. [2022-07-21 15:58:53,271 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 565 transitions. Word has length 101 [2022-07-21 15:58:53,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 15:58:53,272 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 565 transitions. [2022-07-21 15:58:53,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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) [2022-07-21 15:58:53,272 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 565 transitions. [2022-07-21 15:58:53,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-21 15:58:53,273 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 15:58:53,273 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 15:58:53,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 15:58:53,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:58:53,488 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 15:58:53,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 15:58:53,489 INFO L85 PathProgramCache]: Analyzing trace with hash 893903923, now seen corresponding path program 1 times [2022-07-21 15:58:53,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 15:58:53,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601210958] [2022-07-21 15:58:53,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:58:53,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 15:58:53,602 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 15:58:53,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1073853065] [2022-07-21 15:58:53,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:58:53,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:58:53,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 15:58:53,628 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 15:58:53,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 15:58:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 15:58:54,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 1655 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 15:58:54,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 15:58:54,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 15:58:54,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 15:58:54,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 15:58:54,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601210958] [2022-07-21 15:58:54,529 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 15:58:54,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073853065] [2022-07-21 15:58:54,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073853065] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 15:58:54,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 15:58:54,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 15:58:54,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035074015] [2022-07-21 15:58:54,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 15:58:54,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 15:58:54,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 15:58:54,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 15:58:54,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 15:58:54,531 INFO L87 Difference]: Start difference. First operand 438 states and 565 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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) [2022-07-21 15:58:54,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 15:58:54,586 INFO L93 Difference]: Finished difference Result 1102 states and 1424 transitions. [2022-07-21 15:58:54,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 15:58:54,586 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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 101 [2022-07-21 15:58:54,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 15:58:54,589 INFO L225 Difference]: With dead ends: 1102 [2022-07-21 15:58:54,589 INFO L226 Difference]: Without dead ends: 668 [2022-07-21 15:58:54,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 15:58:54,590 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 249 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1126 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 15:58:54,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 1126 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 15:58:54,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-07-21 15:58:54,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 664. [2022-07-21 15:58:54,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 641 states have (on average 1.2792511700468019) internal successors, (820), 646 states have internal predecessors, (820), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-21 15:58:54,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 857 transitions. [2022-07-21 15:58:54,606 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 857 transitions. Word has length 101 [2022-07-21 15:58:54,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 15:58:54,607 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 857 transitions. [2022-07-21 15:58:54,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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) [2022-07-21 15:58:54,607 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 857 transitions. [2022-07-21 15:58:54,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-21 15:58:54,608 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 15:58:54,609 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 15:58:54,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-21 15:58:54,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:58:54,814 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 15:58:54,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 15:58:54,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1884551189, now seen corresponding path program 1 times [2022-07-21 15:58:54,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 15:58:54,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95819010] [2022-07-21 15:58:54,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:58:54,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 15:58:54,883 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 15:58:54,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1989517710] [2022-07-21 15:58:54,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:58:54,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:58:54,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 15:58:54,885 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 15:58:54,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 15:58:55,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 15:58:55,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 15:58:55,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 15:58:55,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 15:58:55,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 15:58:55,635 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 15:58:55,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 15:58:55,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 15:58:55,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 15:58:55,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 15:58:55,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 15:58:55,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 15:58:55,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95819010] [2022-07-21 15:58:55,669 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 15:58:55,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989517710] [2022-07-21 15:58:55,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989517710] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 15:58:55,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 15:58:55,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 15:58:55,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368412990] [2022-07-21 15:58:55,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 15:58:55,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 15:58:55,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 15:58:55,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 15:58:55,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 15:58:55,671 INFO L87 Difference]: Start difference. First operand 664 states and 857 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 15:58:56,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 15:58:56,324 INFO L93 Difference]: Finished difference Result 1238 states and 1596 transitions. [2022-07-21 15:58:56,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 15:58:56,324 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 116 [2022-07-21 15:58:56,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 15:58:56,326 INFO L225 Difference]: With dead ends: 1238 [2022-07-21 15:58:56,327 INFO L226 Difference]: Without dead ends: 664 [2022-07-21 15:58:56,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-21 15:58:56,328 INFO L413 NwaCegarLoop]: 528 mSDtfsCounter, 95 mSDsluCounter, 1311 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1839 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 15:58:56,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 1839 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 15:58:56,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-07-21 15:58:56,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 664. [2022-07-21 15:58:56,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 641 states have (on average 1.2776911076443058) internal successors, (819), 646 states have internal predecessors, (819), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-21 15:58:56,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 856 transitions. [2022-07-21 15:58:56,343 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 856 transitions. Word has length 116 [2022-07-21 15:58:56,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 15:58:56,343 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 856 transitions. [2022-07-21 15:58:56,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 15:58:56,344 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 856 transitions. [2022-07-21 15:58:56,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-21 15:58:56,345 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 15:58:56,345 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 15:58:56,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 15:58:56,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:58:56,560 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 15:58:56,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 15:58:56,560 INFO L85 PathProgramCache]: Analyzing trace with hash -227193184, now seen corresponding path program 1 times [2022-07-21 15:58:56,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 15:58:56,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314666900] [2022-07-21 15:58:56,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:58:56,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 15:58:56,660 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 15:58:56,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1953253660] [2022-07-21 15:58:56,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:58:56,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:58:56,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 15:58:56,662 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 15:58:56,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 15:58:57,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 15:58:57,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 2237 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 15:58:57,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 15:58:57,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 15:58:57,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 15:58:57,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 15:58:57,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314666900] [2022-07-21 15:58:57,577 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 15:58:57,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953253660] [2022-07-21 15:58:57,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953253660] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 15:58:57,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 15:58:57,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 15:58:57,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798447154] [2022-07-21 15:58:57,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 15:58:57,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 15:58:57,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 15:58:57,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 15:58:57,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 15:58:57,579 INFO L87 Difference]: Start difference. First operand 664 states and 856 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 15:58:57,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 15:58:57,642 INFO L93 Difference]: Finished difference Result 1352 states and 1753 transitions. [2022-07-21 15:58:57,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 15:58:57,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 163 [2022-07-21 15:58:57,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 15:58:57,646 INFO L225 Difference]: With dead ends: 1352 [2022-07-21 15:58:57,646 INFO L226 Difference]: Without dead ends: 706 [2022-07-21 15:58:57,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 15:58:57,647 INFO L413 NwaCegarLoop]: 531 mSDtfsCounter, 9 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 15:58:57,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1047 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 15:58:57,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-07-21 15:58:57,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 704. [2022-07-21 15:58:57,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 681 states have (on average 1.261380323054332) internal successors, (859), 686 states have internal predecessors, (859), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-21 15:58:57,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 896 transitions. [2022-07-21 15:58:57,662 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 896 transitions. Word has length 163 [2022-07-21 15:58:57,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 15:58:57,662 INFO L495 AbstractCegarLoop]: Abstraction has 704 states and 896 transitions. [2022-07-21 15:58:57,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 15:58:57,662 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 896 transitions. [2022-07-21 15:58:57,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-21 15:58:57,664 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 15:58:57,664 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 15:58:57,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 15:58:57,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:58:57,888 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 15:58:57,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 15:58:57,888 INFO L85 PathProgramCache]: Analyzing trace with hash 2136648478, now seen corresponding path program 1 times [2022-07-21 15:58:57,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 15:58:57,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952179972] [2022-07-21 15:58:57,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:58:57,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 15:58:58,017 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 15:58:58,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553609684] [2022-07-21 15:58:58,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:58:58,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:58:58,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 15:58:58,018 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 15:58:58,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 15:58:58,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 15:58:59,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 2239 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 15:58:59,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 15:58:59,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 15:58:59,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 15:58:59,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 15:58:59,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952179972] [2022-07-21 15:58:59,029 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 15:58:59,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553609684] [2022-07-21 15:58:59,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553609684] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 15:58:59,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 15:58:59,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 15:58:59,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192068503] [2022-07-21 15:58:59,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 15:58:59,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 15:58:59,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 15:58:59,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 15:58:59,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 15:58:59,032 INFO L87 Difference]: Start difference. First operand 704 states and 896 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 15:58:59,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 15:58:59,094 INFO L93 Difference]: Finished difference Result 1346 states and 1718 transitions. [2022-07-21 15:58:59,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 15:58:59,094 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 163 [2022-07-21 15:58:59,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 15:58:59,097 INFO L225 Difference]: With dead ends: 1346 [2022-07-21 15:58:59,098 INFO L226 Difference]: Without dead ends: 678 [2022-07-21 15:58:59,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 15:58:59,099 INFO L413 NwaCegarLoop]: 532 mSDtfsCounter, 492 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 15:58:59,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 1099 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 15:58:59,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-07-21 15:58:59,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 676. [2022-07-21 15:58:59,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 653 states have (on average 1.2511485451761102) internal successors, (817), 658 states have internal predecessors, (817), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-21 15:58:59,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 854 transitions. [2022-07-21 15:58:59,117 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 854 transitions. Word has length 163 [2022-07-21 15:58:59,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 15:58:59,118 INFO L495 AbstractCegarLoop]: Abstraction has 676 states and 854 transitions. [2022-07-21 15:58:59,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 15:58:59,119 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 854 transitions. [2022-07-21 15:58:59,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-21 15:58:59,120 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 15:58:59,120 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 15:58:59,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 15:58:59,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-21 15:58:59,344 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 15:58:59,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 15:58:59,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1984933676, now seen corresponding path program 1 times [2022-07-21 15:58:59,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 15:58:59,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119856695] [2022-07-21 15:58:59,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:58:59,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 15:58:59,465 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 15:58:59,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1725655527] [2022-07-21 15:58:59,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:58:59,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:58:59,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 15:58:59,488 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 15:58:59,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 15:59:00,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 15:59:00,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 2225 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 15:59:00,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 15:59:00,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 15:59:00,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 15:59:00,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 15:59:00,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119856695] [2022-07-21 15:59:00,701 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 15:59:00,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725655527] [2022-07-21 15:59:00,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725655527] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 15:59:00,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 15:59:00,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 15:59:00,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375350661] [2022-07-21 15:59:00,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 15:59:00,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 15:59:00,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 15:59:00,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 15:59:00,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 15:59:00,704 INFO L87 Difference]: Start difference. First operand 676 states and 854 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 15:59:00,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 15:59:00,775 INFO L93 Difference]: Finished difference Result 1533 states and 1962 transitions. [2022-07-21 15:59:00,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 15:59:00,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 163 [2022-07-21 15:59:00,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 15:59:00,780 INFO L225 Difference]: With dead ends: 1533 [2022-07-21 15:59:00,780 INFO L226 Difference]: Without dead ends: 915 [2022-07-21 15:59:00,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 15:59:00,782 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 220 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 15:59:00,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 1061 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 15:59:00,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-07-21 15:59:00,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 813. [2022-07-21 15:59:00,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 787 states have (on average 1.2617534942820838) internal successors, (993), 792 states have internal predecessors, (993), 22 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-21 15:59:00,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1036 transitions. [2022-07-21 15:59:00,802 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1036 transitions. Word has length 163 [2022-07-21 15:59:00,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 15:59:00,802 INFO L495 AbstractCegarLoop]: Abstraction has 813 states and 1036 transitions. [2022-07-21 15:59:00,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 15:59:00,802 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1036 transitions. [2022-07-21 15:59:00,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-07-21 15:59:00,804 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 15:59:00,805 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 15:59:00,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 15:59:01,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:59:01,019 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 15:59:01,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 15:59:01,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1090168527, now seen corresponding path program 1 times [2022-07-21 15:59:01,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 15:59:01,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718748353] [2022-07-21 15:59:01,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:59:01,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 15:59:01,078 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 15:59:01,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [855780476] [2022-07-21 15:59:01,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:59:01,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:59:01,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 15:59:01,080 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 15:59:01,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 15:59:02,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 15:59:02,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 1362 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 15:59:02,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 15:59:02,296 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 15:59:02,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 15:59:02,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 15:59:02,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718748353] [2022-07-21 15:59:02,297 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 15:59:02,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855780476] [2022-07-21 15:59:02,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855780476] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 15:59:02,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 15:59:02,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 15:59:02,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530169198] [2022-07-21 15:59:02,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 15:59:02,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 15:59:02,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 15:59:02,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 15:59:02,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 15:59:02,299 INFO L87 Difference]: Start difference. First operand 813 states and 1036 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 15:59:03,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 15:59:03,052 INFO L93 Difference]: Finished difference Result 1342 states and 1716 transitions. [2022-07-21 15:59:03,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 15:59:03,053 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 178 [2022-07-21 15:59:03,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 15:59:03,055 INFO L225 Difference]: With dead ends: 1342 [2022-07-21 15:59:03,056 INFO L226 Difference]: Without dead ends: 665 [2022-07-21 15:59:03,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 15:59:03,057 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 835 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 15:59:03,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [835 Valid, 639 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-21 15:59:03,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-07-21 15:59:03,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 665. [2022-07-21 15:59:03,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 644 states have (on average 1.2468944099378882) internal successors, (803), 649 states have internal predecessors, (803), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-21 15:59:03,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 836 transitions. [2022-07-21 15:59:03,074 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 836 transitions. Word has length 178 [2022-07-21 15:59:03,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 15:59:03,074 INFO L495 AbstractCegarLoop]: Abstraction has 665 states and 836 transitions. [2022-07-21 15:59:03,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 15:59:03,075 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 836 transitions. [2022-07-21 15:59:03,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-07-21 15:59:03,076 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 15:59:03,076 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 15:59:03,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-21 15:59:03,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-21 15:59:03,291 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 15:59:03,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 15:59:03,292 INFO L85 PathProgramCache]: Analyzing trace with hash -559500548, now seen corresponding path program 1 times [2022-07-21 15:59:03,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 15:59:03,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277594919] [2022-07-21 15:59:03,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:59:03,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 15:59:03,352 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 15:59:03,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597272651] [2022-07-21 15:59:03,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 15:59:03,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 15:59:03,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 15:59:03,354 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 15:59:03,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process